Co-reporter:Yan-Zhu Du, Ji-Min Zheng
Inorganic Chemistry Communications 2016 Volume 66() pp:59-63
Publication Date(Web):April 2016
DOI:10.1016/j.inoche.2016.01.020
•A new series of lanthanide metal complexes based on p-methoxybenzoic acid have been synthesized and characterized.•These complexes are isostructural, giving 1D chain structures.•Magnetic studies show different magnetic properties for these complexes.A new series of lanthanide metal complexes [Ln(L)3]n (L = p-methoxybenzoic acid, Ln = Pr 1, Eu 2, Tb 3, Dy 4, Ho 5, Er 6, Yb 7) have been synthesized under hydrothermal conditions. Single-crystal X-ray diffraction measurements reveal that these compounds are isostructural, crystallizing in the monoclinic space group P21/c and giving 1D chain structures. Magnetic studies reveal antiferromagnetic behavior for complexes 1, 3, 5 and 6, ferromagnetic behavior for complex 4 and spin-canting behavior for 7.A new series of lanthanide metal complexes have been synthesized and characterized. These compounds are isostructural, crystallizing in the monoclinic space group P21/c and giving 1D chain structures. Magnetic studies reveal antiferromagnetic behavior for complexes 1, 3, 5 and 6, ferromagnetic behavior for complex 4 and spin-canting behavior for 7.
Co-reporter:Yu Zhang, Ji-Min Zheng
Inorganic Chemistry Communications 2015 Volume 59() pp:21-24
Publication Date(Web):September 2015
DOI:10.1016/j.inoche.2015.06.018
•We have synthesized and characterized three novel lanthanide polymers.•Magnetic studies of polymers 1–3 have been implemented.•1–3 present ferromagnetic, antiferromagnetic and spin canting behavior, respectively.•For 1 and 3, sigmoidal curve hysteresis loops without hysteresis was observed.Three novel lanthanide polymers, [Ln(III)(L)3EtOH]n (Ln = Tb(1), Ho(2), Er(3), HL = 2,3,5-trichlorobenzoic acid), have been solvothermal synthesized and characterized by single-crystal X-ray diffraction, infrared spectroscopy and element analyses. The three polymers crystallize in triclinic space group P-1. The Ln(III) ions are in turn bridged by double and quadruple carboxylate of L− ligands to form one-dimensional (1D) chains. Magnetic studies reveal that polymer 1 demonstrates dominant ferromagnetic behavior, polymer 2 shows antiferromagnetic behavior, and polymer 3 present spin-canting behavior.Three novel lanthanide polymers based on 2,3,5-trichlorobenzoic acid have been solvothermal synthesized and characterized. Polymers 1–3 are isostructural which crystallize in the triclinic space group P-1. Magnetic studies reveal that polymer 1 demonstrates dominant ferromagnetic behavior, polymer 2 shows antiferromagnetic behavior, and polymer 3 presents spin-canting behavior.
Co-reporter:Fang-Hua Zhao, Hui Li, Yun-Xia Che, Ji-Min Zheng, Veacheslav Vieru, Liviu F. Chibotaru, Fernande Grandjean, and Gary J. Long
Inorganic Chemistry 2014 Volume 53(Issue 18) pp:9785-9799
Publication Date(Web):August 29, 2014
DOI:10.1021/ic501374q
Co-reporter:Fang-Hua Zhao and Ji-Min Zheng
RSC Advances 2014 vol. 4(Issue 99) pp:56434-56439
Publication Date(Web):08 Oct 2014
DOI:10.1039/C4RA09588J
Two new Zn(II) complexes, namely, [Zn2(BTEC)0.5(ATZ)2(H2O)3]·H2O (1) and [Zn1.5(2,5-PYDC)(ATZ)(H2O)]2 (2) have been assembled from 5-amino-1-H-tetrazole (HATZ) with two aromatic polycarboxylate ligands under hydrothermal conditions (H4BTEC = 1,2,4,5-benzenetetracarboxylic acid, 2,5-PYDC = 2,5-pyridinedicarboxylic acid). Single crystal X-ray analysis reveals that both complexes display three-dimensional (3D) structures. Complex 1 is a binodal (4,4)-connected bbf net with a (64·82)(66)2 topological symbol. Complex 2 displays a trinodal (3,3,4)-connected net with (4·102)2(102·12)2(42·102·122) topology. In the two structures, all the HATZ ligands are deprotonated and act as the anions, and the ATZ− anions all connected two Zn(II) centers with a μ2-mode. In addition, the two complexes display photoluminescence at 442 nm (λex = 342 nm) and 468 nm (λex = 374 nm), respectively. And their thermal stability has also been studied.
Co-reporter:Xin Tan, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2014 Volume 39() pp:110-113
Publication Date(Web):January 2014
DOI:10.1016/j.inoche.2013.11.012
•Two 1D lanthanide complexes have been synthesized and characterized.•Magnetic studies reveal antiferromagnetic behavior for complex 1.•The luminescence spectrum of complex 2 exhibits characteristic emissions of Sm(III).Two novel lanthanide complexes, [Nd2(L)6(bipy)(H2O)]n (1) and [Sm2(L)6(bipy)(H2O)]n (2) (HL = 3,5-bis(trifluoromethyl)benzoic acid, bipy = 2,2′-bipyridine), have been solvothermal synthesized and characterized by single-crystal X-ray diffraction, infrared spectroscopy, element analyses and powder X-ray diffraction. Single-crystal X-ray diffraction measurements reveal that the crystal structures are isostructural, crystallizing in the orthorhombic space group P-1 and they consist of linear tetrameric Ln4 units which are connected through carboxylate of L ligands into a one-dimensional (1D) zigzag chain and spread into 2D supramolecular (4,4) sql net. Furthermore, magnetic studies reveal antiferromagnetic behavior for complex 1. The luminescent properties of 2 were also studied.Two novel lanthanide complexes have been synthesized and characterized. The crystal structures are isostructural and they consist of linear tetrameric Ln4 units which are connected into a 1D zigzag chain and spread into 2D supramolecular (4,4) sql net. Furthermore, magnetic and luminescent properties were also studied.
Co-reporter:Xin Tan, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2013 Volume 37() pp:17-20
Publication Date(Web):November 2013
DOI:10.1016/j.inoche.2013.09.019
•Two novel 3d–4f tetranuclear complexes have been synthesized and characterized.•They display tetranuclear feature, while exhibiting diverse magnetic behaviors.•The magnetic studies demonstrate slow magnetic relaxation processes for 2.The solvothermal reactions of 3,5-bis(trifluoromethyl)benzoic acid (HL) and 2,2′-bipyridine (bipy) with the corresponding metal salts afforded two novel 3d–4f tetranuclear complexes M2Dy2(L)10(bipy)2 (M = Mn 1, Cu 2), which have been characterized by single-crystal X-ray diffraction, infrared spectroscopy, element analyses, powder X-ray diffraction and thermal gravimetric analyses. Complexes 1 crystallizes in the triclinic space group P-1, and the completely deprotonated L ligands possess μ2: η1, η1 and μ2: η2, η1 coordination modes to bridge adjacent metal ions which further connect into 2D layers by hydrogen bonds. Complex 2 crystallizes in the distinct monoclinic space group P21/c, and adjacent metal ions were linked by L ligands with the same coordinated patterns with 1, and supramolecular sheets were formed in the ab plane. Dynamic magnetic susceptibility studies reveal slow magnetic relaxation processes for 2, suggesting SMM type behavior.Two novel 3d–4f tetranuclear complexes based on 3,5-bis(trifluoromethyl)benzoic acid have been solvothermal synthesized and characterized. They both exhibit tetranuclear structure feature, whereas crystallize in different space group and have various magnetic behavior. Complex 2 shows slow magnetic relaxation processes.
Co-reporter:Xin Tan, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2013 Volume 35() pp:231-234
Publication Date(Web):September 2013
DOI:10.1016/j.inoche.2013.06.043
•Two lanthanide complexes from 3,5-dichlorobenzoic acid have been synthesized.•Complex 1 affords 1D chains with La6 units which are peculiar.•Complex 2 gives 1D Dy chains and exhibits antiferromagnetic behavior.Two novel lanthanide complexes, [La3(L)8(phen)(OH)(H2O)]n (1) and [Dy(L)3(EtOH)]n (2) (HL = 3,5-dichlorobenzoic acid, phen = phenanthroline), have been solvothermal synthesized and characterized by single-crystal X-ray diffraction, infrared spectroscopy, element analyses, powder X-ray diffraction and thermal gravimetric analyses. Complex 1 affords one-dimensional chains with hexanuclear La6 units which are peculiar in the coordination chemistry of La(III) and extended into a 3D supramolecular network via π–π stacking and hydrogen-bonding interactions. Whereas complex 2 gives 1D Dy chains, which are in turn bridged by double and quadruple carboxylate of L ligands and construct a 2D layer by weak hydrogen bonds. In addition, magnetic studies reveal antiferromagnetic behavior for complex 2.Two novel lanthanide complexes based on 3,5-dichlorobenzoic acid have been solvothermal synthesized and characterized. Complex 1 affords one-dimensional chains with hexanuclear La6 units which are peculiar in the coordination chemistry of La(III). Complex 2 gives one-dimensional Dy chains and displays antiferromagnetic behavior.
Co-reporter:Xin Tan, Yan-Zhu Du, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2013 Volume 36() pp:63-67
Publication Date(Web):October 2013
DOI:10.1016/j.inoche.2013.08.012
•Eleven chiral 3d-4f MOFs have been synthesized and characterized.•They exhibit unique 6-connected frameworks.•The magnetic behaviors have been systematically investigated.The hydrothermal reactions of D(+)-camphoric acid (D-H2Cam) and 1,10-phenanthroline (phen)/2,2′-bipyridine (2,2′-bipy) with the corresponding metal salts gave rise to eleven chiral 3d–4f heterometallic metal-organic frameworks (MOFs). Single-crystal X-ray diffraction measurements reveal that the crystal structures are isostructural, crystallizing in the orthorhombic space group P212121 and they exhibit unique three-dimensional chiral 6-connected frameworks involving 1D zigzag chains aligned parallel to the a axis and the 2D wave-like lanthanide layers, with the Schläfli symbol (49 · 66). Moreover, we have systematically investigated the magnetic behaviors of partial compounds.Eleven chiral 3d-4f Metal-Organic Frameworks constructed from D(+)-camphoric acid have been synthesized. The crystal structures exhibit unique three-dimensional chiral 6-connected frameworks. The magnetic behaviors have been systematically investigated.
Co-reporter:Fernande Grandjean ;Gary J. Long
Inorganic Chemistry 2012 Volume 51(Issue 8) pp:4862-4868
Publication Date(Web):April 5, 2012
DOI:10.1021/ic300394c
Two acentric, i.e., noncentrosymmetric, mononuclear complexes, Co(5-ATZ)4Cl2, 1, and Cu(5-ATZ)4Cl2, 2, where 5-ATZ is the monodentate 5-amino-1-H-tetrazole ligand, have been prepared and characterized. Both complexes crystallize in the tetragonal system with the P4nc space group, a member of the polar noncentrosymmetric 4mm class, and thus both 1 and 2 can exhibit ferroelectric and nonlinear optical properties. Magnetic studies indicate that 1 is a paramagnetic high-spin cobalt(II) complex with a rather extensive spin–orbit coupling, modeled as a zero-field splitting parameter, D, of ±91(3) cm–1 and with very weak long-range antiferromagnetic exchange interactions. Direct current (dc) and ac magnetic studies indicate that 2 is a paramagnetic copper(II) complex that exhibits weak ferromagnetic exchange interactions below 15 K. Both 1 and 2 exhibit ferroelectric hysteresis loops at room temperature with remanent polarizations of 0.015 μC/cm2 and coercive electric fields of 5.5 and 5.7 kV/cm, respectively.
Co-reporter:Fang-Hua Zhao, Yun-Xia Che, and Ji-Min Zheng
Crystal Growth & Design 2012 Volume 12(Issue 10) pp:4712
Publication Date(Web):September 18, 2012
DOI:10.1021/cg300979c
The hydrothermal reaction of NiCl2·6H2O, azelaic acid (H2aze), and 1,4-bis(1-imidazolyl)benzene (L) has afforded a new 3D polynuclear nickel complex, {[Ni5(aze)3(H2aze)0.5(μ3-OH)2(L)4][Ni(aze)(L)(H2O)2]2Cl2}·4H2O (1). The cationic [Ni5(aze)3(H2aze)0.5(μ3-OH)2(L)4]2+ forms the 3D host-framework, representing as an α-Po net, and neutral [Ni(aze)(L)(H2O)2] displays as left- and right-handed chiral helical chains and acts as guest, penetrating the 1D channels of the host-framework alternately along the b direction. Magnetic studies reveal spin-canting behavior for complex 1.
Co-reporter:Fanghua Zhao, Shuai Jing, Yunxia Che and Jimin Zheng
CrystEngComm 2012 vol. 14(Issue 13) pp:4478-4485
Publication Date(Web):20 Apr 2012
DOI:10.1039/C2CE25272D
Reactions of Co(II) salts with rigid 5-amino-isophthalic acid (AIP) and flexible bis(imidazole) ligands by controlling the metal–ligand ratio gave rise to two pairs of new complexes: [Co(AIP)(bimb)] (1) and [Co(AIP)(bimb)0.5] (2), [Co(AIP)(bix)]·H2O (3) and [Co2(AIP)2(bix)1.5] (4) (bimb = 1,4-bis (imidazol-1-yl)-butane, bix = 1,4-bis(imidazol-1-yl-methylene)-benzene). Comparative study revealed that the different metal–ligand ratios affected the coordination modes of the ligand and thus resulted in four different structures. All complexes display 2D structures and extend into 3D supramolecular frameworks via intermolecular hydrogen bonds. Complex 1 features a (4,5)-connected hydrogen-bond network. Complex 2 displays a 2D bilayered structure with a rare (3,4)-connected (63)(65 ·8) topology. Complex 3 is an 2D (4,4) network showing 2-fold parallel interpenetrating 2D → 2D structure, which features the 2-fold interpenetrating cds hydrogen-bond net. Complex 4 shows a trinodal (4,4,5)-connected hydrogen-bond net. Magnetic studies of 1 reveal ferromagnetic interaction at low temperature and 4 displays antiferromagnetic behavior.
Co-reporter:Fang-Hua Zhao, Yun-Xia Che and Ji-Min Zheng
CrystEngComm 2012 vol. 14(Issue 20) pp:6397-6399
Publication Date(Web):27 Jul 2012
DOI:10.1039/C2CE25911G
A new nickel complex, [Ni(pim)(bibp)1.5(H2O)]·1.25H2O (1, pim = pimelic acid, bibp = 4,4′-bis(1-imidazolyl)biphenyl), was obtained via hydrothermal synthesis. The complex shows an unprecedented 2D→3D net with the coexistence of polycatenation and polythreading based on the T-shaped bilayer motifs.
Co-reporter:Hong-Yu Xu, Fang-Hua Zhao, Yun-Xia Che and Ji-Min Zheng
CrystEngComm 2012 vol. 14(Issue 20) pp:6869-6874
Publication Date(Web):14 Aug 2012
DOI:10.1039/C2CE25859E
Three 3d–4f heterometallic complexes, namely, [Co3Ln2(L)4(C2O4)2(H2O)2·6H2O]n (Ln = Pr (1), Nd (2), Sm (3); H2L = benzimidazole-5,6-dicarboxylic acid, H2C2O4 = oxalic acid), have been synthesized hydrothermally and characterized by single crystal X-ray diffraction study, IR, TGA and elemental analysis. The three complexes are isostructural; in their structures, the Co(II) centers are connected into a linear Co3 cluster by the C2O42− anions, the Ln(III) centers are connected into one-dimensional (1D) {Ln–O–C}n rod-like chains by the carboxyl groups of L2− anions, the linear Co3 clusters and {Ln–O–C}n rod-like chains are further connected by the L2− anions, and finally construct three 3D frameworks, which contain 1D channels along the b direction occupied by (H2O)8 clusters. In addition, magnetic studies of the three complexes all reveal antiferromagnetic behaviors.
Co-reporter:Dan FENG, Yunxia CHE, Jimin ZHENG
Journal of Rare Earths 2012 Volume 30(Issue 8) pp:798-801
Publication Date(Web):August 2012
DOI:10.1016/S1002-0721(12)60133-1
An acentric complex, [Sm(HCOO)3]n (1), was hydrothermally synthesized and characterized by single-crystal X-ray diffraction, IR, and element analysis. Complex 1 crystallized in the rhombohedral system with acentric space group R3m and afforded a three-dimensional (3D) structure. Interestingly, ferroelectric and magnetic studies revealed that complex 1 demonstrated both ferroelectric and antiferromagnetic properties.
Co-reporter:Yu-Ting Yang, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 Volume 17() pp:49-53
Publication Date(Web):March 2012
DOI:10.1016/j.inoche.2011.12.012
A novel chiral copper-based complex constructed from chiral ligand, namely [Cu(L)(H2O)]·H2O (1) (L = (S)-3-phenyl-2-(pyrazine-2-carboxamido) propanoic acid). Complex 1 was prepared through solvothermal reactions and characterized by single-crystal X-ray diffraction. Complex 1 crystallizes in the tetragonal system with non-centrosymmetric polar space group P43 and affords one-dimensional (1D) chiral helical chain. Ferroelectric and magnetic studies reveal that 1 shows both ferroelectric and weak ferromagnetic properties.A novel chiral copper-based complex crystallizes in the tetragonal system with non-centrosymmetric polar space group P43 and affords one-dimensional (1D) chiral helical chain. Ferroelectric and magnetic studies reveal that 1 shows both ferroelectric and weak ferromagnetic properties.Highlights► Crystallizes in the tetragonal system with non-centrosymmetric polar space group P43 and affords one-dimensional (1D) chiral helical chain. ► The adjacent helical chains are linked by intermolecular hydrogen bonds, generating a 3D supermolecular network. ► Ferroelectric and magnetic measurements show both ferroelectric and weak ferromagnetic properties.
Co-reporter:Fang-Hua Zhao, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 Volume 16() pp:55-60
Publication Date(Web):February 2012
DOI:10.1016/j.inoche.2011.11.030
Two new coordination complexes, {[Co3(nip)2(ina)2(H2O)2]·4H2O}n (1) and {[Mn3(nip)2(ina)2]}n (2) (nip = 5-nitroisophthalic acid, ina = isonicotinic acid), have been hydrothermally synthesized from mixed rigid ligands. Complex 1 consists of linear trimeric Co3 units which are connected through double bridges into a two-dimensional (2D) (4,4) sql net. While for complex 2, the metal Mn centers are connected into infinite {⋯Mn2⋯Mn2⋯Mn1⋯}n chains which are bridged by nip and ina ligands into a 3D structure with pcu topology. Magnetic properties of the two complexes have also been studied, complex 1 displays ferromagnetic interaction between intracluster Co(II) ions, and complex 2 shows antiferromagnetic behavior.Syntheses and characterizations of two novel complexes based on mixed rigid ligands are described. Complexes 1 and 2 display 2D (4, 4) sql network and 3D pcu network, respectively. Their magnetic properties have also been investigated.Highlights►Two complexes based on mixed rigid ligands have been synthesized and characterized. ►Complex 1 consists of linear Co3 units and displays ferromagnetic behavior. ►Complex 2 consists of infinite metal chains and displays antiferromagnetic behavior.
Co-reporter:Fang-Hua Zhao, Yun-Xia Che, Ji-Min Zheng
Inorganica Chimica Acta 2012 Volume 384() pp:170-175
Publication Date(Web):1 April 2012
DOI:10.1016/j.ica.2011.11.057
Two new MOFs, [Mn(HBTC)(2-PyBim)(H2O)] (1) and [Zn2(BTC)(OH)(2-PyBim)] (2) (H3BTC = 1,3,5-benzenetricarboxylic acid, 2-PyBim = 2-(2-pyridyl)benzimidazole), have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction (XRD), infrared spectroscopy (IR), elemental analysis (EA). In 1, adjacent two Mn(II) ions are connected into binuclear Mn2 units which are bridged by HBTC2− anions to generate a two-dimensional (2D) (4,4) network. In 2, the Zn(II) ions are connected into tetranuclear Zn4 units which are bridged by the BTC3− anions to generate a 2D (3,6)-connected non-interpenetrating CdI2-type network with (43)2(46 · 66 · 83) topology symbol. Both 1 and 2 are extended into 3D supramolecular structure by hydrogen bonds and π⋯π interactions. Magnetic studies of 1 indicate that it exhibits ferromagnetic coupling between the binuclear Mn(II) ions, polymer 2 was found to exhibit photoluminescence at about 437 nm (λex = 365 nm).Graphical abstractSyntheses and characterizations of two novel metal–organic frameworks based on binuclear and tetranuclear units are described. 1 and 2 display 2D (4,4) network and (3,6)-connected network, respectively. The magnetic and photoluminescent properties have also been reported.Highlights► Two novel 2D metal–organic frameworks with different topology have been synthesized and structurally characterized. ► 1 Consists of binuclear Mn2 units and displays ferromagnetic behavior. ► 2 Consists of tetranuclear Zn4 units and displays intense photoluminescent emission in the solid state.
Co-reporter:Fang-Hua Zhao, Shu-Hui Liang, Shuai Jing, Yue Wang, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 Volume 21() pp:109-113
Publication Date(Web):July 2012
DOI:10.1016/j.inoche.2012.04.025
A novel chiral cyanide-bridged Pr(III)-Cr(III) bimetallic complex, [Pr(DMSO)4(H2O)3Cr(CN)6] (1) (DMSO = dimethylsulfoxide) has been prepared and characterized by single-crystal X-ray diffraction, IR, elemental analysis and solid-state CD spectra. Complex 1 crystallizes in the monoclinic with chiral space group P21 and displays as a dinuclear molecule. The solid-state CD spectra confirm the chiral nature of complex 1. Magnetic studies indicate ferromagnetic interactions between Pr(III) and Cr(III) ions. Ferroelectric measurements reveal that complex 1 exhibits ferroelectric features representing electric hysteresis loops at room temperature with remanent polarizations of 0.111 μC/cm2 and coercive electric fields of 4.13 kV/cm.Synthesis and characterizations of a novel chiral cyanide-bridged Pr(III)-Cr(III) bimetallic complex are discribed. Complex 1 crystallizes in the monoclinic with chiral space group P21 and displays as a dinuclear molecule. Ferromagnetic interactions between Pr(III) and Cr(III) ions and electric hysteresis loops at room temperature were observed for complex 1.Highlights► A novel chiral cyanide-bridged Pr(III)-Cr(III) bimetallic complex is described. ► Complex 1 crystallizes in chiral space group P21 showing a dinuclear molecule. ► Magnetic and ferroelectric properties of 1 have been investigated.
Co-reporter:Xin Tan, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 Volume 22() pp:10-13
Publication Date(Web):August 2012
DOI:10.1016/j.inoche.2012.05.001
Two chiral complexes, [Cu(L1)(L2)H2O]·3H2O (1) and [Ni(L1)(SCN)(H2O)2]·2H2O (2) (HL1 = L-histidine, HL2 = L-alanine), have been synthesized through slow evaporation of solvent and characterized by single-crystal X-ray diffraction, IR, powder X-ray diffraction, element analysis and circular dichroism measurements. Complexes 1 and 2 crystallize in the monoclinic system with chiral space group P21, respectively. Interestingly, magnetic and ferroelectric studies reveal that complexes 1 and 2 demonstrate ferromagnetic and ferroelectric properties.Two chiral complexes constructed from mixed L-histidine and L-alanine or thiocyanate ligands have been synthesized through slow evaporation of solvent. Magnetic and ferroelectric studies reveal that complexes 1 and 2 demonstrate ferromagnetic and ferroelectric double functions in aspect of multiferroic complexes.Highlights► Two chiral complexes have been synthesized through slow evaporation of solvent. ► The two complexes crystallize in the monoclinic system with chiral space group P21, respectively. ► Both ferromagnetic and ferroelectric behaviors were observed.
Co-reporter:Yue Wang, Fang-Hua Zhao, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 Volume 17() pp:180-183
Publication Date(Web):March 2012
DOI:10.1016/j.inoche.2012.01.007
The hydrothermal reaction of CdCl2·2.5H2O with 3,5-bis-oxyacetate-benzoic acid (H3BOABA) and 4,4′-bis(1-imidazolyl)biphenyl (L) generates a new three-dimensional (3D) coordination polymer, {[Cd2(BOABA)(L)(μ3-OH)]2·3H2O}n (1). In 1, the Cd(II) centers are connected by carboxylate and μ3-OH bridges into Cd-O-C rod-like secondary building units (SBUs) which are further linked by BOABA3 − and L ligands into the 3D framework. Two types of irregular rhombic channels occupied by free water molecules were observed in the framework. And the topology analysis suggests an unusual (4,8)-connected net for 1. Furthermore, the thermal and photoluminescent properties of 1 have also been studied.This paper described the synthesis and characterizations of one novel complex based on 3,5-bis-oxyacetate-benzoic acid and rigid bis(imidazole) ligand. Complex 1 consists of Cd-O-C rod-like secondary building units (SBUs) and displays a three-dimensional (4,8)-connected net. The thermal and photoluminescent properties of 1 have also been investigated.Highlights► One new 3D complex based on mixed O- and N-donor ligands was described. ► Complex 1 consists of Cd-O-C rod-like SBUs and displays a (4,8)-connected net. ► The thermal and photoluminescent properties of 1 have also been investigated.
Co-reporter:Fang-Hua Zhao, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 Volume 17() pp:99-103
Publication Date(Web):March 2012
DOI:10.1016/j.inoche.2011.12.024
Three new complexes, namely, [M(Pim)(L)] (M = Co (1), Cd (2), Pim = Pimelic acid, L = 1,4-bis(1-imidazolyl)-benzene), [Zn(Pim)(L)]·H2O (3), have been synthesized hydrothermally from the self-assembly of the transtion metal ions (M2 +) with flexible aliphatic dicarboxylate ligand (Pim) and the rigid bis(imidazole) ligand(L). Both complexes 1 and 2 consist of left- and right-handed single-helical chains and present a two-dimensional (2D) layer with 36-hxl topology. Complex 3 displays a 2D structure constructed by right-handed single-helical chains and left-handed double-helical chains with intercrossed arrangement. Furthermore, thermogravimetric analyses for 1–3 and the photoluminescent properties of 2 and 3 have also been studied.Syntheses and characterizations of three novel 2D complexes based on pimelic acid and rigid bis(imidazole) ligand are discribed. Complexes 1 and 2 display as 36-hxl nets with left- and right-handed single-helical chains. Complex 3 is constructed by right-handed single-helical chains and left-handed double-helical chains with intercrossed arrangement. Their thermal and photoluminescent properties have also been investigated.Highlights► Three 2D complexes with helical chains have been synthesized and characterized. ► 1 and 2 consist of left- and right-handed helical chains and display 36-hxl nets. ► 3 consists of single-helical and double-helical chains with intercrossed arrangement.
Co-reporter:Yue Wang, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 Volume 21() pp:69-71
Publication Date(Web):July 2012
DOI:10.1016/j.inoche.2012.04.015
The hydrothermal reaction of CoCl2·6H2O, 4,4′-(ethene-1,2-diyl)dibenzoic acid (H2L) and 1,3,5-tris(imidazol-1-ylmethyl)-2,4,6-trimethylbenzene (titb) generates a new three-dimensional (3D) coordination polymer [Co(titb)(L)]·3H2O (1). Compound 1 crystallizes in a noncentrosymmetric Cc space group and the topology analysis suggests it features a rare binodal (3,5)-connected (63)(69·8) hms net with 2-fold interpenetration, constructed by the 2D Co(titb)2 + sheet pillared by L ligands via coordination to the Co atoms. Furthermore, the thermal and ferroelectric properties of 1 have also been studied.This work reported a new 3D ferroelectric Co(II) polymer showing (3,5)-connected hms topology with 2-fold interpenetration constructed by the 2D Co(titb)2 + sheet pillared by L ligands.Highlights► A noncentrosymmetric polar compound 1 showing a rare (3,5)-connected hms topology. ► Two of these nets interpenetrate. ► Ferroelectric behavior was observed for compound 1.
Co-reporter:Fang-Hua Zhao, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 Volume 24() pp:200-204
Publication Date(Web):October 2012
DOI:10.1016/j.inoche.2012.07.012
Three new 3D transition metal coordination complexes, namely, [Co(Aze)(L)] (1), [Cu(Aze)(L)]2 (2) and [Cd(Aze)(L)]·3H2O (3) (Aze = azelaic acid, L = 1,4-bis (1-imidazolyl)-benzene) have been synthesized hydrothermally from the self-assembly of the transition metal ions (M2 +) with flexible aliphatic dicarboxylate ligand (Aze) and the rigid bis(imidazole) ligand (L). All complexes display three-dimensional (3D) structures. Complex 1 shows a three-fold interpenetrating 4-connected dmp net. Complex 2 shows a noninterpenetrating 4-connected cds net. Complex 3 shows the pcu net built on 6-connected Cd2 units and particularly there exists weave-like water chains penetrating the channels of the pcu net along b direction. Furthermore, thermogravimetric studies of 1, 2 and 3, and photoluminescent property of 3 have also been investigated.Three 3D complexes constructed from azelaic acid and rigid bis(imidazole) ligand are described. Complex 1 displays a 3-fold interpenetrating dmp net. Complex 2 shows a noninterpenetrating cds net. Complex 3 shows the pcu net with weave-like water chains along b direction. The thermogravimetric and photoluminescent properties have also been investigated.Highlights► Three 3D complexes based on azelaic acid and bis(imidazole) ligands are described. ► Complex 1 displays a 3-fold interpenetrating dmp net. ► Complex 2 displays a noninterpenetrating cds net. ► Complex 3 shows a pcu net containing weave-like water chains with photoluminescence.
Co-reporter:Yue Wang, Fang-Hua Zhao, Ai-Hua Shi, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2012 20() pp: 23-26
Publication Date(Web):
DOI:10.1016/j.inoche.2012.02.005
Co-reporter:Yan-Hua Su, Feng Luo, Hui Li, Yun-Xia Che and Ji-Min Zheng
CrystEngComm 2011 vol. 13(Issue 1) pp:44-46
Publication Date(Web):26 Oct 2010
DOI:10.1039/C0CE00066C
A new metal–organic polymer, namely {Co(2,2′,4,4′-H2bptc)}n (1), 2,2′,4,4′-H4bptc = biphenyl-2,2′,4,4′-tetracarboxylic acid) obtained viahydrothermal reaction, compound 1 shows an unusual hex-type rod-packing architecture. Moreover, the magnetic studies of 1 disclose a weak intra-chain ferromagnetic interaction.
Co-reporter:Yun Xu;Yun-Xia Che;Fang-Yi Cheng
European Journal of Inorganic Chemistry 2011 Volume 2011( Issue 34) pp:5299-5304
Publication Date(Web):
DOI:10.1002/ejic.201100450
Abstract
Two new LaIII–MgII heterometallic polymers, {[La2(oda)6Mg2][Mg(H2O)6]·6H2O}n (1) and {[La2(pda)6Mg3(H2O)6]·11H2O}n (2) (H2oda = oxydiacetic acid, H2pda = pyridine-2,6-dicarboxylic acid), have been synthesized under solvothermal conditions. Structural analysis reveals that 1 contains two types of 3D cavities, one of which is occupied by [Mg(H2O)6]2+ units, and the other is occupied by free water molecules. The metal-only structure of 2 is a hexagonal network, in which the cavities are occupied by free water molecules. The adsorption properties of 1 and 2 have been investigated. The hydrogen adsorption and desorption curves of the two polymers show an unusual, pronounced hysteresis behavior.
Co-reporter:Yu-Ting Yang, Fang-Hua Zhao, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2011 Volume 14(Issue 11) pp:1802-1806
Publication Date(Web):November 2011
DOI:10.1016/j.inoche.2011.08.014
Two novel complexes, [Co3(N3)2(bca)4(phen)2] (1, bca = benzenecarboxylic acid, phen = 1,10-Phenanthroline) and [Co3(N3)2(bdc)2(phen)2]n (2, bdc = terephthalic acid), have been synthesized hydrothermally and characterized by single crystal X-ray diffraction (XRD), infrared spectra (IR) and element analysis (EA). Complex 1 features unprecedented discrete linear Co3 clusters that formed by mixed (μ-EO-N3)(μ-COO)2 (EO = end-on) triple bridges whereas 2 presents an extended (2D) network based on the similar trinuclear units as 1. Magnetic studies of 1 and 2 reveal that the mixed (μ-EO-N3)(μ-COO)2 triple bridges transmit ferromagnetic behavior.Two novel complexes based on a linear trinuclear Co (II) unit with the mixed (μ-EO-N3)(μ-COO)2 triple bridges motif were synthesized under hydrothermal condition. Magnetic measurements show ferromagnetic coupling during linear Co3 units.Highlights► A unique mixed-bridged trinuclear Co3 cluster and its extended system. ► Linear trinuclear Co (II) unit with mixed triple bridges. ► Ferromagnetic coupling within [Co3(μ-EO-N3)2(μ-COO)4] trimer unit.
Co-reporter:Yu-Ting Yang, Fang-Hua Zhao, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2011 Volume 14(Issue 12) pp:1855-1859
Publication Date(Web):December 2011
DOI:10.1016/j.inoche.2011.08.011
Two novel metal–organic frameworks of [M3(ptz)2(N3)4(H2O)2] (M = Zn(1), Cd(2)) (ptz = 5-(4-pyridyl)tetrazolate) have been prepared hydro(solvo)thermally by reactions of 4-cyanopyridine and excess NaN3 in the presence of zinc and cadmium chloride, respectively. The overall structure motif of complexes 1 and 2 show pillared layered frameworks and feature an unprecedented 3-nodal network with (3,5,6)-connectivity. The layer is of particular interest as it is constructed by μ1,1–N3− and μ1,1,3–N3− bridging modes, simultaneously. Furthermore, the solid fluorescent properties and TGA were studied.Two isostructural complexes feature a novel 3D pillared layered structure which represents an uncommon example of a (3,5,6)-connected net with Schläfli symbol of (4.53.6.73.8.9)(42.54.62.74.93)(4.7.8)(4.5.6).Highlights► Two pillared layered three-dimensional complexes have been synthesized. ► The layer is constructed by μ1,1–N3− and μ1,1,3–N3− bridging modes, simultaneously. ► The frameworks exhibit 3-nodal network with (3,5,6)-connectivity topology. ► Complexes 1 and 2 exhibit strong photoluminescence at room temperature.
Co-reporter:Pang-kuan Chen, Yan Qi, Yun-xia Che and Ji-min Zheng
CrystEngComm 2010 vol. 12(Issue 3) pp:720-724
Publication Date(Web):08 Oct 2009
DOI:10.1039/B919676P
Two coordination polymers, [CoIICuI(m-BDC)(BIPY)1.5(m-NBZ)]n (1) and [CoII4(BPTC)2(BBI)4]n (2), (where BIPY = 4,4′-bipyridine, BBI = 1,1′-(1,4-butanediyl)bis(imidazole), m-BDC = 1,3-benzenedicarboxylate, m-HNBZ = m-nitrobenzoic acid and H4BPTC = 3,3′,4,4′-biphenyltetracarboxylic acid), have been obtained under solvo/hydrothermal conditions, which were characterized by single-crystal X-ray diffraction, XRPD, IR, ICP, TGA, and elemental analysis. Both 1 and 2 feature two unusual binodal self-penetrated architectures: 1 presents a 2-D network with (4·62)2(42·62·82) topology in terms of the rationalization of T-shaped CuI and Co2 unit as 3- and 4-connected node, respectively; however, compound 2 built up from a flexible long-chain ligand and a polycarboxylate confers a 3-D (62·84)(64·82)2 net based on the definition of square-planar and tetrahedral 4-connected nodes. The magnetic study of 1 was carried out in the temperature range of 5–300 K, showing antiferromagnetic coupling interaction within the dimeric Co2 unit. In addition, 1 was found to exhibit fluorescence at about 420 nm (λex = 330 nm).
Co-reporter:Li Zhang, Ya-Li Yao, Yun-Xia Che and Ji-Min Zheng
Crystal Growth & Design 2010 Volume 10(Issue 2) pp:528-533
Publication Date(Web):January 5, 2010
DOI:10.1021/cg9006229
Four entangled polymers, namely, [Ni(bpea)(L1)(H2O)]n (1), [Ni(bpea)(L2)]n (2), {[Ni(bpea)(L3)1.5(H2O)]·(L3)}n (3), and [Co(bpea)(L3)]n (4) (H2bpea = biphenylethene-4′,4-dicarboxylic acid, L1 = 1,3-di(4-pyridyl)propane, L2 = 1,4-bis(imidazol-1-yl-methylene)benzene, L3 = 1,4-bis(1-imidazolyl)benzene) have been synthesized by a hydrothermal reaction. Complex 1 has a 2-fold (4,4)-net parallel interpenetrating structure, while complex 2 shows three-dimensional (3D) structure with 2-fold (4,4)-net inclined polycatenation. Complex 3 displays 3-fold interpenetrated 3D structure, which is the first example of an interpenetrated structure of 4466-sqp topology. Complex 4 is a 3D structure with a 3-fold interpenetrated α-Po topology. Our results imply that the self-assembly of long multicarboxylate and long heterocyclic aromatic ligands with metal ions is a facile assay to produce various interpenetrated metal−organic frameworks. Furthermore, their thermal properties were studied by thermogravimetric analysis. The magnetic property of 4 was measured.
Co-reporter:Li-Xin Sun, Yan Qi, You-Ming Wang, Yun-Xia Che and Ji-Min Zheng
CrystEngComm 2010 vol. 12(Issue 5) pp:1540-1547
Publication Date(Web):08 Jan 2010
DOI:10.1039/B909590J
A polycarboxylate ligand, biphenyl-3,3′,4,4′-tetracarboxylic acid (H4bptc), as an organic linker with different flexible bis(imidazole) ligands as co-ligands were selected to react with metal ions under hydrothermal conditions and six new metal–organic frameworks consisting of 1D, 2D and 3D structures were successfully isolated. Compound 1 is a fascinating self-penetrating network with the [Co2L12] loops and 2D [Co(bptc)0.5] sheet intra-catenated (L1 = 1,4-bis(imidazol-1-yl-methylene)-benzene). Compounds 2 and 3 feature an identical binodal 4-connected (64·82)2(65·8) net. Compound 4 is a 1D chain containing loops that further interconnected via O–H⋯O hydrogen bonds to form a 3D supramolecular framework. Compounds 5 and 6 are both corrugated 2D networks, however, the 1D [Zn(bptc)0.5] chains are linked by [Zn2L42] metallocycles in 5 and a pair of 1D [Cd(L4)]n chains in 6 (L4 = 1,1′-(2,2′-oxybis(ethane-2,1-diyl))bis(1-imidazole)). A comparison of all complexes demonstrates that the coordination modes of bptc4− anions and the structural characteristics of flexible N-donor ligands simultaneously play an important role in the construction of the complexes.
Co-reporter:Yang Liu, Yan Qi, Yan-Hua Su, Fang-Hua Zhao, Yun-Xia Che and Ji-Min Zheng
CrystEngComm 2010 vol. 12(Issue 10) pp:3283-3290
Publication Date(Web):25 Jun 2010
DOI:10.1039/B925829A
Five novel metal–organic frameworks (MOFs) have been hydrothermally synthesized, namely, [Co(bimb)(2,4′-bpdc)(H2O)2]·H2O (1), [Co2(bimb)3(2,4′-bpdc)2(H2O)2]·H2O (2), [Co(bix)(2,4′-bpdc)] (3), [Co(bix)0.5(2,4′-bpdc)(H2O)0.25] (4) and [Co(bimh)(2,4′-bpdc)] (5), based on mixed ligands, 2,4′-biphenyldicarboxylic acid (2,4′-H2bpdc) as organic linkers and different bis(imidazole) ligands as co-ligands: (1,4-bis(imidazol-1-yl)-butane (bimb), 1,4-bis(imidazol-1-yl-methylene)-benzene (bix) and 1,6-bis(imidazol-1-yl)-hexane (bimh)). The coordination polymers were characterized by single-crystal X-ray diffraction, thermogravimetric analysis (TGA) and element analysis (EA). Reactions between CoCl2·6H2O, 2,4′-H2bpdc and neutral bimb ligand afforded two crystallographically different coordination polymers (1 and 2) through tuning the ligand/metal ratio meticulously. Compound 1 crystallizes in a noncentrosymmetric Pna21 space group with 65·8 CdSO4-type topology, while compound 2 is isolated with P21/c space group and displays a 4-connected 66 network. By substituting bix for bimb ligand, alteration of the metal/ligand ratio in the initial reaction system induced a transition from 2D layer (compound 3) to 3D architecture (compound 4). Notably, the structure of 4 is constructed from [Co(2,4′-bpdc)] layers, which are further pillared by bix ligands into a 3D 3,4-connected (63)·(63·103) network. In 5, the left- and right-handed helical chains constructed by Co(II) and bimh ligands are bridged by 2,4′-bpdc2− anions to form a layer-like structure.
Co-reporter:Yun Xu;Pang-Kuan Chen;Yun-Xia Che
European Journal of Inorganic Chemistry 2010 Volume 2010( Issue 34) pp:5478-5483
Publication Date(Web):
DOI:10.1002/ejic.201000832
Abstract
In this paper we report three new metal–organic frameworks (MOFs), [Zn(oba)(L1)0.5(H2O)]n (1), [Zn2(oba)2(L2)2](H2O)3 (2) and [Co(oba)(L1)]n (3) [oba = 4,4′-oxybis(benzoate), L1 = 1,4-bis(imidazol-1-ylmethyl)benzene, L2 = 1,4-bis(imidazol-1-yl)benzene] that have been obtained under hydrothermal conditions and characterized by single-crystal X-ray diffraction, powder X-ray diffraction (PXRD), infrared spectroscopy (IR), thermogravimetric analysis (TGA) and elemental analysis (EA). A structural investigation revealed that all three coordination compounds present polycatenation features. Interestingly, 1 shows a rare 1D 2D structure formed by the catenation of 1D ladders. Both 2 and 3, however, are unusual cases that have 3D frameworks constructed from 2D 44-sql layers by parallel polycatenation. The photoluminescence properties of 1 and 2 have also been investigated.
Co-reporter:Yanyan Lv;Yan Qi;Lixin Sun;Feng Luo;Yunxia Che ;Jimin Zheng
European Journal of Inorganic Chemistry 2010 Volume 2010( Issue 35) pp:5592-5596
Publication Date(Web):
DOI:10.1002/ejic.201000402
Abstract
Three novel metal-organic polymers, namely, [Ni(L1)0.5(3,5-pdc)(μ-H2O)]·H2O (1), [Co(L2)(3,5-pdc)]·2H2O (2), and [Co(L3)(3,5-pdc)(μ-H2O)]·H2O (3) [3,5-pdc = pyridine-3,5-dicarboxylate, L1 = 1,4-bis(imidazol-1-ylmethyl)benzene, L2 = 1,1′-(1,4-butanediyl)bis(imidazole), and L3 = 1,1′-(1,4-hexanediyl)bis(imidazole)], have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction (XRD), thermogravimetric (TG) analysis, and elemental analysis (EA). Polymers 1 and 2 have the identical 2D [M(3,5-pdc)] sheet skeleton, however, different bis(imidazole) ligands cause 1 to have a 2D (3,4)-connected double-layer net featuring the (63)(64·82) topology symbol and 2 to have a 2D (3,5)-connected net characterized by the (3 52)(32·53·64·7) topology symbol. They are both extended to 3D supramolecular frameworks through the O–H···O hydrogen bonds. In particular, in 2 there exists a four-membered Z-shape water cluster. The Co ions in 3 are connected by 3,5-pdc and L3 to give rise to a complicated 3D framework that can be described as a (3,5)-connected (42·5)(42·63·82·102·12) network. In addition, the thermal analysis of these three complexes has been measured and discussed.
Co-reporter:Yun Xu, Feng Luo, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2010 Volume 13(Issue 12) pp:1489-1492
Publication Date(Web):December 2010
DOI:10.1016/j.inoche.2010.08.024
A novel coordination polymer [Zn3(btrc)2(L1)]n (1) (H3btrc = 1, 2, 4-benzenetricarboxylic acid; L1 = 1, 3-bis(4-pyridyl)propane) has been synthesized under hydrothermal conditions. Single crystal X-ray diffraction study reveals that polymer 1 presents an unusual example of (3, 6, 10)-connected net with (4·6·7) (52·66·77) (416·512·64·713) topology symbol, where btrc3−, Zn2(CO2)4, and Zn4(CO2)8 units act as three-, six-, and ten-connecting nodes, respectively. In addition, the IR spectra, luminescence properties and thermogravimetric analysis of this polymer are investigated in this study.A new 3D coordination polymer with unusual example of trinodal (3, 6, 10)-connected net topology constructed from Zn2- and Zn4-based SBUs is shown. Our results provide an intriguing example of topological matrix and further demonstrate the concept of using metal clusters as building blocks for constructing new highly connecting solid-state materials.
Co-reporter:Feng Luo, Yun-xia Che and Ji-min Zheng
CrystEngComm 2009 vol. 11(Issue 6) pp:1097-1102
Publication Date(Web):13 Feb 2009
DOI:10.1039/B812479E
Two new metal–triazole-benzenedicarboxylate coordination polymers are obtained by the hydrothermal self-assembly of Zn(or Cd)(NO3)2, trz, and 1,3-H2BDC(or 1,4-H2BDC), where trz and BDC are triazole and benzenedicarboxylate. Polymer 1, Zn(trz)(1,3-HBDC), crystallizes in the P21/c space group and shows the 2D fes 4·82 net, which is further extended via strong O–H⋯O/2.641 Å hydrogen bonds, creating the supramolecular 3,4-connected net described by (4·82)(4·82·103) Schläfli symbol. Polymer 2, Cd4(H2O)2 (trz)2(1,4-BDC)3·H2O, have the C2/c space group and complicated 3D architecture, an architecture that is comprised of two distinct rod-like substructures, viz. 4-connected {Cd(trz)(H2O)(CO2)}n of corner-sharing octahedra and 6-connected {Cd(trz)(CO2)}n of edge-sharing octahedra. In the solid, both 1 and 2 have strong luminescence, viz. 453 nm for 1 and 398 nm for 2, which suggests the potential luminescence material of 1 and 2.
Co-reporter:Li-Xin Sun, Yan Qi, Yun-Xia Che, Stuart R. Batten and Ji-Min Zheng
Crystal Growth & Design 2009 Volume 9(Issue 7) pp:2995
Publication Date(Web):June 1, 2009
DOI:10.1021/cg9002719
Three unprecedented entangled systems are successfully obtained. Compounds 1 and 2 are self-penetrating networks with intracatenated [M2bimh2] loops and two-dimensional [M2(bptc)] sheets ((H4bptc = biphenyl-3,3′,4,4′-tetracarboxylic acid, bimh = 1,6-bis(imidazol-1-yl)-hexane), while compound 3 is a three-dimensional self-penetrating network which results from the hydrothermal in situ formation of a new tetradentate ligand, 1,2,4,5-tetra(4-pyridyl)benzene, through dehydrogenative coupling of 1,3-bis(4-pyridyl)propane molecules.
Co-reporter:Feng Luo, Yun-xia Che and Ji-min Zheng
Crystal Growth & Design 2009 Volume 9(Issue 2) pp:1066
Publication Date(Web):December 2, 2008
DOI:10.1021/cg800895g
One-pot solvothermal self-assembly is employed to prepare a series of Co3 based porous coordination polymers, viz. 1, [H2N(CH3)2]2[Co3(ip)4]·H2O, 2, [H2N(CH3)2]2[Co3(bdc)4]·(DMF)2, 3, [H2N(CH3)2]2[Co3(bpdc)4]·(CH3OH)2(DMF)1.5, where ip, bdc, bpdc, and DMF are 1,3-benzenedicarboxylate, 1,4-benzenedicarboxylate, 4,4′-biphenyldicarboxylate, and N,N′-dimethylformamide, respectively. Via different organic connectors such as ip, bdc, and bpdc, such Co3 molecular building blocks (MBB), [Co3(CO2)8]2−, are associated together to give a tunable 8-connected topological framework, viz. 42464 for 1, 36414576 for 2, and 36418536 for 3. Upon the geometry and the length of organic connectors, their corresponding porosity occupied by c counterions plus solvent molecules also can be tunable, for example, with the consideration of [H2N(CH3)2]+ counterions, the solvent-accessible volume is 460.2 Å3 for 1, equal to 23.9% of the cell volume, 3320.4 Å3 for 2, equal to 56.3% of the cell volume, 4107.2 Å3 for 3, equal to 50% of the cell volume. Notably, besides these outstanding features of tunable 8-connected topology and porosity, their magnetic properties such as ferromagnetic behavior without magnetic ordering for 1, spin-canting and metamagnetic behavior with magnetic ordering for 2, as well as spin-canting, metamagnetic, and spin-glass behavior with magnetic ordering for 3 also can be tunable.
Co-reporter:Ya-Li Yao, Lin Xue, Yun-Xia Che and Ji-Min Zheng
Crystal Growth & Design 2009 Volume 9(Issue 1) pp:606-610
Publication Date(Web):November 26, 2008
DOI:10.1021/cg8009157
Two pairs of Cd(II)-5-aminotetrazolate coordination complexes, {[Cd(5-HATZ)2(H2O)2(μ2-SO4)]·H2O}n (1a) and [Cd5(5-ATZ)4(μ3-OH)2(μ5-SO4)2]n (1b), [Cd(5-HATZ)2(μ2-Cl)2]n (2a), and [Cd3(5-ATZ)4(MeCN)2(μ2-Cl)2]n (2b), have been synthesized and structurally characterized. At room temperature 1D single-bridged and double-bridged chain-like compounds 1a and 2a were isolated by solution evaporation method. Under hydrothermal synthesis at 180 °C, two three-dimensional coordination polymers 1b and 2b were isolated from compounds 1a and 2a, respectively. 1b is constructed by 3D [Cd5(μ5-SO4)2(μ3-OH)2]n4+ network templated by 5-ATZ anions. 2b exhibits the 3D metal-organic framework with a (8.122)(844.122)(42.124) topology. 5-Aminotetrazolate is a terminal ligand in 1a and 2a, whereas it is three-coordinated and/or four-coordinated in 1b and 2b. Thermal studies show that high-dimensional structures have higher thermal stability than that of 1D structures.
Co-reporter:Feng Luo, Ji-min Zheng and Gary J. Long
Crystal Growth & Design 2009 Volume 9(Issue 3) pp:1271-1274
Publication Date(Web):February 3, 2009
DOI:10.1021/cg801164f
[(CH3)2NH2]2[Co6(μ3-OH)2(μ-H2O)(ip)6]·2.5H2O (1), where ip2− is the 1,3-benzenedicarboxylate dianion, has been prepared by the solvothermal self-assembly of CoCl2 and H2ip in N,N′-dimethylformamide. Complex 1 contains a rare Co6(μ3-OH)2(μ-H2O)(CO2)12 building block with six crystallographically distinct cobalt(II) ions, one with a trigonal bipyramidal, two with a pseudotetrahedral, and three with a pseudooctahedral coordination environment; the bridging ip2− dianions serve as spacers to yield a unique anionic eight-connected net with 36418536 topology. The magnetic properties of 1 indicate that the six cobalt(II) ions are paramagnetic with, at most, very weak intramolecular antiferromagnetic exchange coupling.
Co-reporter:Feng Luo, Yun-xia Che and Ji-min Zheng
Crystal Growth & Design 2009 Volume 9(Issue 5) pp:2047
Publication Date(Web):April 7, 2009
DOI:10.1021/cg801208z
Polymer 1, Cu3(μ2-OH)2(nic)4 (Hnic= isonic otinic acid), was prepared by the hydrothermal self-assembly of CuCl and Hnic in the presence of HClO4. The outstanding feature of it is the moganite matrix with 2-fold interpenetration built on two distinct copper nodes and ferromagnetic coupling pathway in the Cu(tetrahedron)−Cu(square)−Cu(tetrahedron) fashion.
Co-reporter:Pang-kuan Chen, Stuart R. Batten, Yan Qi and Ji-Min Zheng
Crystal Growth & Design 2009 Volume 9(Issue 6) pp:2756
Publication Date(Web):April 20, 2009
DOI:10.1021/cg8013893
A couple of metal-organic frameworks (MOFs) constructed from rigid bicarboxylates are presented herein, namely, Co3(ndc)3(bbi)(CH3CN)2 (1) and Dy2Mn3(ndc)6(bipy)2 (2), where H2ndc = 2,6-naphthalenedicarboxylic acid, bipy = 2,2′-pyridine, and bbi = 1,1′-(1,4-butanediyl)bis(imidazole). These two coordination polymers have been prepared through solvo/hydrothermal reactions and characterized by single-crystal X-ray study, TG, IR, and elemental analysis. Polymer 1 features a novel self-penetrating network mediated by flexible long-chain ligand and well defines a unique 416·58·64 topology with the treatment of Co3 unit as an 8-connected node, which equals the highest connectivity for monometallic self-penetrating system so far. Polymer 2 represents the first example of a MnII−DyIII (3d-4f) heteropentanuclear complex showing an intriguing 3-D 36·418·53·6 framework upon the assignment of Dy2Mn3 cluster to an 8-connected node. In addition, magnetic studies of 1 reveal that the antiferromagnetic behavior is operative within the trimeric Co3 cluster and 2 demonstrates dominant ferromagnetic coupling interactions between DyIII and MnII ions.
Co-reporter:Yang Liu, Yan Qi, Yan-Yan Lv, Yun-Xia Che and Ji-Min Zheng
Crystal Growth & Design 2009 Volume 9(Issue 11) pp:4797
Publication Date(Web):September 18, 2009
DOI:10.1021/cg9006372
The paper presents three interesting entanglement systems, including two polyrotaxane-like and one interpenetrating frameworks, namely, [Co(L1)(bpdc)] (1), [Co(L2)(bpdc)] (2), and [Co(L3)1.5(bpdc)(H2O)]·(L3) (3), constructed from biphenyl-4,4′-dicarboxylate and bis(imidazole) ligands (L1 = 1,6-bis(imidazol-1-yl)-hexane, and rods that are interlaced in a parallel fashion to result in 2D → 2D polyrotaxane-like motifs (L2 = 1,4-bis(imidazol-1-ylmethyl)benzene and L3 = 1,4-bis(1-imidazolyl)-benzene)). Both compounds 1 and 2 contain loops. Compound 3 represents the first example of a triply interpenetrated 5-connected 4466 topology network.
Co-reporter:Feng Luo, Yun-xia Che, Ji-min Zheng
Microporous and Mesoporous Materials 2009 Volume 117(1–2) pp:486-489
Publication Date(Web):1 January 2009
DOI:10.1016/j.micromeso.2008.07.044
Via solvothermal synthesis, the self-assembly of CuCl2, 1,4-benzenedicarboxylic acid, and N,N′-bis(4-pyridylformamide)-1,4-benzene in DMF generated a layer-pillared metal-organic coordination polymer, which affords two-fold interpenetration and considerable solvent-accessible channels where the guest water molecules reside. Further, the TG and XRD researches disclose that such interpenetrating net stabilized by H-bonds can be maintained up to 350 °C even after the release of free water molecules, and through the calcination and immersion experiments, it is suggested that the guest water molecules in the channels are reversible, which is traced by XRD and IR studies.
Co-reporter:Yi Jin, Yan Qi, Stuart R. Batten, Pengzhen Cao, Wei Chen, Yunxia Che, Jimin Zheng
Inorganica Chimica Acta 2009 Volume 362(Issue 10) pp:3395-3400
Publication Date(Web):1 August 2009
DOI:10.1016/j.ica.2008.04.019
Two cyano-bridged cadmium(II) and copper(II)–copper(I) mixed-valence polymer compounds [CuII(en)2]{[CuII(en)2]2-μ-(CN)4-[Cd3Cu6I(CN)14]}1 and [CuII(en)2]0.5[CdCuI(CN)3] · Cl · H2O 2 (en = 1,2-ethanediamine) through systematically varying the solution environment have been synthesized and structurally characterized by single crystal X-ray diffraction analysis. The cyano anions connected the copper and cadmium centres with bidentate or tridentate bridging modes resulting in two complicated 3D networks for 1 and 2. Compound 1 has a rare 5,6-connected network, while compound 2 can be reduced to a 6-connected α-Po net. The magnetic and thermal properties of 1 and 2 are also studied.In this paper, we first report two 3D coordination network configurations in which cadmium(II) and copper(II) – copper(I) centres connect though cyano- bridges. The cyano anions connected the cadmium and copper centres with bidentate or tridentate bridging modes resulting in two complicated 3D networks for 1 and 2. Complex 1 has a rare 5,6-connected network, while complex 2 can be reduced to a 6-connected a-Po net. The magnetic and thermal properties of 1 and 2 are also studied.
Co-reporter:Yun Xu, Feng Luo, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2009 Volume 12(Issue 7) pp:639-641
Publication Date(Web):July 2009
DOI:10.1016/j.inoche.2009.05.009
A new metal-organic framework (MOF) [Co2(μ3-OH)(μ2-OH2)(oba)(Hoba)(pyz)]n(1), (oba = 4,4’-oxybis(benzoate), pyz = pyrazine) has been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, infrared spectroscopy, thermal gravimetric analysis, elemental analysis, and magnetic techniques. The framework defines an eight-connected CsCl net with 424·64 topology symbol. To the best of our knowledge, this is the first eight-connected CsCl-type net built on unique [Co2(μ3-OH)(μ2-OH2)(CO2)3]2 molecular building blocks (MBBs).The combination of the flexible v-shaped H2oba ligands and the cabinet pyz ligands lead to a new metal-organic framework that contains unique [Co2(μ3-OH)(μ2-OH2)(CO2)3]2 molecular building blocks and defines an eight-connected CsCl net with 424·64 topology.
Co-reporter:Yan Qi, Feng Luo, Stuart R. Batten, Yun-Xia Che and Ji-Min Zheng
Crystal Growth & Design 2008 Volume 8(Issue 8) pp:2806
Publication Date(Web):July 2, 2008
DOI:10.1021/cg701061q
This paper reports eight novel one-dimensional (1D) helical chain polymers consisting of metal salts and flexible bis(imidazole) ligands, formulated as [Co(L1)2(bimb)] (1), [Cu2(bimb)2Cl2] (2), [Co(L2)2(bimb)] (3), [Co(L3)(bix)Cl] (4), [Co(L4)2(bix)] (5), [Co(L5)2(bimb)] (6), [Ni(L6)2(bimb)] (7), and [Ni(L7)2(bimb)] (8) (bimb = 1,4-bis(imidazol-1-yl)-butane, bix = 1,4-bis(imidazol-1-yl-methylene)-benzene, HL1 = 3,5-dinitrobenzoic acid, HL2 = 4-methoxylbenzoic acid, HL3 = benzoic acid, HL4 = 4-methylbenzoic acid, HL5 = 3-nitrobenzoic acid, HL6 = 4-nitrobenzoic acid and HL7 = 4-chlorobenzoic acid), which have been obtained via hydrothermal reaction and characterized by single-crystal X-ray diffraction, elemental analysis, IR and thermogravimetric analyses. 1 consists of chiral polymer chains assembled from achiral components due to the presence of left-handed helices. 2 is a very unusual racemic compound based on perpendicular left- and right-handed helical chains. 3 contains two distinct types of helical chains, one with an almost flat, zigzag type geometry and the other showing a distinct tubular motif. 4 is also a racemic compound with tubes larger than those in 3. 5−8 show rare meso-helical structures. This series of complexes provides new examples of 1D infinite helical structures for flexible bis(imidazole) ligands.
Co-reporter:Feng Luo, Yunxia Che and Jimin Zheng
Crystal Growth & Design 2008 Volume 8(Issue 6) pp:2006
Publication Date(Web):May 16, 2008
DOI:10.1021/cg8001898
In this work, we report two 3,8-connected nets. The first one is polymers 1−3, La(pydc)(L)0.5(µ-H2O) (pydc = pyridine-2,5-carboxylate, H2L = adipic acid), which are isostructural and described by the (4·5·6)2(42·56·616·72·82) topology notation, and the other one is polymer 4, Co3(1,4-BDC)(1,2-BDC)2(µ2-H2O)2(µ-H2O)2 (1,4-BDC = 1,4-benzenedicarboxylate, 1,2-BDC = 1,2-benzenedicarboxylate), characterized by the tfz-d net with the (43)2(46·618·84) topology symbol. Comparing with the reported 3,8-connected nets, the present examples show several unique properties: (a) the La2- and Co3-based MBBs are unprecedented; (b) two different multicarboxylate ligands are employed to construct such nets; (c) the 3D matrix of polymers 1−3 is unique and unprecedented.
Co-reporter:Yan Qi, Yunxia Che, Feng Luo, Stuart R. Batten, Yang Liu and Jimin Zheng
Crystal Growth & Design 2008 Volume 8(Issue 5) pp:1654
Publication Date(Web):March 26, 2008
DOI:10.1021/cg7011217
A new long flexible ligand, L = 1,1′-(2,2′-oxybis(ethane-2,1-diyl))bis(1H-imidazole), has been prepared. The hydrothermal reactions of L with various metal ions (M(II) = Co, Zn, and Cd) as well as a series of aromatic polycarboxylate co-ligands yielded seven new metal−organic frameworks consisting of 1D, 2D, and 3D structures. Complexes 1–5 are constructed by SBU I (a M2L2 metallocycle), while complexes 6 and 7 are assembled by SBU II (left- and right-handed helical [M(L)]n chains). In 1and 2, the SBUs I are bridged by 1,2-BDC (1,2-benzenedicarboxylate) and 3,5-DNP (3,5-dinitrophthalate) anions with the same coordination modes to generate 1D chains with repeated rings. 3 exhibits a typically 3-fold interpenetrated 3-connected (10,3)-b net. In 4, the Co centers are connected by μ3-OH and carboxylic O atoms to form a cobalt−oxygen tetranuclear cluster. 5 represents an uncommon example of a 3,4-connected net with (83)2(85 × 10) topology. In 6, the SBUs II are extended by 1,4-BDC (1,4-benzenedicarboxylate) anions to afford highly undulated 2D (4, 4) layers. In 7, the [Cd3(1,3-BDC)3] ladders connect to SBUs II to form a corrugated 2D network. A comparison of all complexes demonstrates that the structural characteristics of L ligand and organic counteranions simultaneously play an important role in the construction of the complexes. In addition, complexes 3 and 7 exhibit strong blue photoluminescence, and compound 4 is an antiferromagnet.
Co-reporter:Yan Qi, Yun-Xia Che and Ji-Min Zheng
Crystal Growth & Design 2008 Volume 8(Issue 10) pp:3602-3608
Publication Date(Web):September 17, 2008
DOI:10.1021/cg800087q
This paper presents four interesting entanglement systems, including one self-penetrating and three interpenetrating frameworks, namely, [Ni3(L)3(BTC)2·2H2O]·6H2O (1), [Mn(L)(HBTC)] (2), [Ni2(L)2(BDC)2·2H2O]·H2O (3), and [Mn4(L)4(BDC)4]·H2O (4) (H3BTC = 1,3,5-benzenetricarboxylic acid and H2BDC = 1,4-benzenedicarboxylic acid), based on a rigid 1,4-bis(1-imidazolyl)benzene (L) ligand. Compound 1 is the first example of a (3,4)-connected self-penetrating three-dimensional (3D) polymer containing two types of catenated rings with the unprecedented (6·82)2(62·84)2(64·82) topology. Compound 3 has self-assembled into a 5-fold interpenetrating 3D structure with diamond nets, while both compounds 2 and 4 display 2-fold interpenetrating 3D structures with α-Po structural topology.
Co-reporter:Yali Yao, Yunxia Che and Jimin Zheng
Crystal Growth & Design 2008 Volume 8(Issue 7) pp:2299-2306
Publication Date(Web):June 13, 2008
DOI:10.1021/cg7010106
The first coordination chemistry of a multidentate ligand benzimidazole-5,6-dicarboxylic acid (H2L) was investigated, and six novel two-dimensional (2D) coordination polymers based on this ligand, namely, [MnL]n (1), {[Ni2L2(H2O)4]·3H2O}n (2), {[Tb(L)(HL)(H2O)]·H2O}n (3) and {[Ln2L2(HL)2(H2O)2]}n (Ln = Ho (4), Er (5), Lu (6)), were synthesized under hydrothermal conditions. Compund 1 shows a novel coordination network with 4462 topology and contains unusual five-coordinated one-dimensional {Mn−O}n chains along the b-axis. Compound 2 is a 2D layer structure of 4.82 topology in the ab plane and displays a three-dimensional (3D) supramolecular network via multiple intermolecular hydrogen bonds. Compound 3 also shows a 4462 topology, but its coordination network is completely different from compound 1. Compounds 4−6 were isostructural, and each Ln (Ln = Ho (4), Er (5), Lu (6)) center in the framework acts as a five-connected node to give rise to a unique network with a (3.4.6)(32.4.5.62.74) topology in the ab plane. Six complexes exhibit six types of bridging modes of the ligand. The numbers of L ligands around the metal centers increase from 3 (Ni) to 4 (Mn) and finally to 5 (Ln) as a result of an increase in metal ionic radii. The temperature-dependent magnetic susceptibility data have been explained with the Fisher model, with parameters g = 2.05, J = −3.06 cm−1 for 1, and g = 2.09, J = −0.35 cm−1 for 2, indicating antiferromagnetic coupling. The luminescent properties of 3 were studied.
Co-reporter:Feng Luo, Gary J. Long, Yun-xia Che and Ji-min Zheng
Crystal Growth & Design 2008 Volume 8(Issue 10) pp:3511-3513
Publication Date(Web):August 28, 2008
DOI:10.1021/cg800640u
Hydrothermal synthesis was used to prepare Ln2(C2O4)(O2CCH2OH)4 (Ln = Gd(III)/1 Tb(III)/2) from HCO2CH2OH and C2O42−, the latter being formed in situ from HCO2CH2OH. The new compounds crystallize with the same unique 2-fold interpenetrating 4,6-connected net described by (32·62·72)(34·42·64·75) topology, a topology that is based on a combination of highly unusual rectangular and distorted hexagonal lanthanide nodes. Gd2(C2O4)(O2CCH2OH)4, 1, exhibits fully paramagnetic behavior with µeff = 7.938(5) µB per Gd(III) ion; in the solid state, Tb2(C2O4)(O2CCH2OH)4, 2, exhibits very strong luminescence.
Co-reporter:Yu-ting Yang, Feng Luo, Yun-xia Che and Ji-min Zheng
Crystal Growth & Design 2008 Volume 8(Issue 10) pp:3508-3510
Publication Date(Web):August 22, 2008
DOI:10.1021/cg800431b
A series of heterometallic Co(II)−Ln(III) metal-azido complexes, Co2Ln(μ3-OH) (nic)5(N3)(1) (Hnic = nicotinic acid) (Ln = Tb/1, Gd/2, Dy/3, Eu/4, Sm/5), have been synthesized hydrothermally and characterized by X-ray diffraction analysis, which shows the 6-connected α-Po net, where the uncommon [Co2Ln(μ3-OH)(CO2)5(N3)]2 MBBs act as six-connected nodes and display ferromagnetic interactions.
Co-reporter:Yan Qi, Feng Luo, Yunxia Che and Jimin Zheng
Crystal Growth & Design 2008 Volume 8(Issue 2) pp:606
Publication Date(Web):December 13, 2007
DOI:10.1021/cg700758c
Via hydrothermal synthesis, the self-assembly of M(II) ions, H3BTC or H2NDC with three structure-related flexible bis(imidazole) ligands, L1, L2, and L3, generated six metal−organic polymers (M = Co, Ni, Zn; BTC = 1,3,5-benzenetricarboxylate, NDC = 1,2-benzenebicarboxylate, L1 = 1,4-bis(imidazol-1-ylmethyl)benzene, L2 = 1,1′-(1,4-butanediyl)bis(imidazole), L3 = 1,1′-(1,4-hexanediyl)bis (imidazole)): {Co3(L1)3(BTC)2(μ-H2O)3·2H2O}n (1), {Zn2(L2)(HBTC)2·2H2O}n (2), {Co(L3)(HBTC)}n (3), {Co(L1) (NDC)}n (4), {Ni(L2)(NDC)}n (5), and {Co(L3) (NDC)}n (6). The structure of 1 is the rare 4-connected self-penetrating metal−organic framework (MOF) with the (63)2(64·82)2(62·84) topology notation; polymers 2 and 6 are two-dimensional (2D) (3,4)-connected and 4-connected nets, respectively. If the O−H…O/2.631 Å hydrogen bonds between HBTC2− dianions are not accounted for, then polymer 3 is a 2D (3,5)-connected net; contrarily, it is a pillar-layered three-dimensional supramolecular framework characterized by (4,5)-connected (42·62·82)(42·68) topology. 4 and 5 show 4-connected MOFs with 65·10 and 65·8 CdSO4-type topology, respectively. Furthermore, their thermal properties are studied by thermogravimetric analysis.
Co-reporter:Feng Luo, Yun-xia Che, Ji-min Zheng
Inorganic Chemistry Communications 2008 Volume 11(Issue 2) pp:142-144
Publication Date(Web):February 2008
DOI:10.1016/j.inoche.2007.11.006
In the presence of NaOH, the self-assembly of M(CH3COO)2 and nitrilotriacetate generated two metal–organic polymers, MNa(NTA), (M = Pb(1), Sr(2), NTA3+ = the anion of nitrilotriacetate). The single crystal X-ray diffraction shows that polymers 1 and 2 are isostructural and display the chiral P213 space group with the Flack factor of −0.001(16) for 1 and 0.023(14) for 2. By topology analysis, the complicated architecture of 1 and 2 is simplified to be the 6-connected pcu-type net, which is built on the vertex-shared, bowl-like MNa3 SBUs (pcu = primitive centered cubic, SBU = secondary building unit).Two new chiral MOFs show the first pcu net comprised of six-connected, vertex-shared, bowl-like MNa3 SBUs.
Co-reporter:Feng Luo, Yun-xia Che, Ji-min Zheng
Inorganic Chemistry Communications 2008 Volume 11(Issue 4) pp:358-362
Publication Date(Web):April 2008
DOI:10.1016/j.inoche.2007.12.024
Herein, we report two microporous MOFs, viz. Mn3(1,4-BDC)3(μ-DMF)2 (1), and Mn4(1,3-BDC)4(μ2-DMF)2 · (DMF)2 (2). Both 1 and 2 are constructed from the Mn–O–C rod-like SBUs and afford the irregular rhombic channels occupied by coordinated or free DMF molecules. The topology analysis suggests the pcu (also named α-Po) net for1 and sra (also named Al in SrAl2) net for 2. Moreover, the 1D Fisher mode is applied to analysis the experimental magnetic data, resulted in the J =− 1.12 cm−1, θ = 0.15 K, g = 2.0 for 1 and J =− 2.07 cm−1, θ = 0.21 K, g = 1.98 for 2, which suggests the antiferromagnetic interactions within the Mn–O–C rod and inter-chain ferromagnetic interactions (1,4-BDC = 1,4-benzenedicarboxylate, 1,3-BDC = 1,3-benzenedicarboxylate, J, g, and θ parameter are magnetic coupling parameter, Zeeman factor and the inter-chain interactions, respectively).Two new microporous MOFs were constructed from the infinite rod-like Mn-O-C SBUs, and topology analysis suggests the pcu and sra net for them.
Co-reporter:Ya-li Yao, Yun-Xia Che, Ji-Min Zheng
Inorganic Chemistry Communications 2008 Volume 11(Issue 8) pp:883-885
Publication Date(Web):August 2008
DOI:10.1016/j.inoche.2008.04.024
Benzimidazole-5-carboxylate (HL1) and 5-methylbenzimidazole-6-carboxylic acid (HL2) have been employed to assemble with Cd(II) ions under hydrothermal conditions, leading to the generation of 1D (1) and 2D (2) metal-organic frameworks. The two coordinated water molecules of cadmium in 1 restrain the carboxylic moiety from adopting a bidentate chelating coordination mode, which seems to be an important factor in the dramatic structural change from 1D to 2D. Both complexes display blue emission in the solid state and the luminescent properties relate to their structures.A contrastive study for the coordination chemistry of benzimidazole-5-carboxylate (HL1) and 5-methylbenzimidazole-6-carboxylic acid (HL2) based on two MOFs was reported. Both complexes exhibit blue fluorescent emission bands in the solid state.
Co-reporter:Feng Luo, Ji-min Zheng and Stuart R. Batten
Chemical Communications 2007 (Issue 36) pp:3744-3746
Publication Date(Web):03 Jul 2007
DOI:10.1039/B706177C
Via solvothermal synthesis, the self-assembly of CuCl2, 1,3,5-benzenetricarboxylic acid, and N,N′-bis(4-pyridylformamide)-1,4-benzene in DMF generated a novel coordination polymer containing an unprecedented (3,4)-connected network; 3-fold interpenetration and considerable solvent-accessible cavities occupied by reversible guest water molecules were also observed.
Co-reporter:Feng Luo;Yun-xia Che
European Journal of Inorganic Chemistry 2007 Volume 2007(Issue 24) pp:
Publication Date(Web):29 JUN 2007
DOI:10.1002/ejic.200700285
Under mild temperatures, the self-assembly of CoCl2 and H3BTC in a solution of dmso generates a guest-free metal–organic polymer, namely Co3(BTC)2(μ1-dmso)2(μ2-dmso)2(1: dmso = dimethylsulfoxide, H3BTC = 1,3,5-benzenetricarboxylic acid). In 1, the CoII ions show the six-coordinate octahedral geometry completed by the BTC3– ions and the dmso oxygen atoms; remarkably, the coordinated dmso ligands not only act as terminal ligands to complete the octahedral geometry of the CoII ions, but also play an important role in bridging CoII ions together to give the Co3 secondary building units (SBUs). From a topological viewpoint, this novel polymer is classified to be the decorated (3,6)-connected rutile net with the (4.62)2(42.610.83) topology, where BTC3– ligands and Co3 SBUs are viewed to be the 3- and 6-connected nodes, respectively. In addition, the magnetic properties of 1 are explored by using a linear trinuclear cobalt mode, thusleading to g = 2.41, J = –34.92 cm–1, TIP = 340 × 10–6 cm3 mol–1,θ = –6 K (a θ parameter was included to take into account intertrinuclear interactions).(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)
Co-reporter:Feng Luo Dr.;Stuart R. Batten Dr.;Yunxia Che
Chemistry - A European Journal 2007 Volume 13(Issue 17) pp:
Publication Date(Web):20 MAR 2007
DOI:10.1002/chem.200601246
Three series of porous lanthanide metal-organic coordination polymers, namely [Cu(bpy)Ln3(ip)5(Hip)(H2O)] [Ln = Er (1 a), Y (1 b), Eu (1 c); bpy = 2,2′-bipyridine, H2ip=isophthalic acid], [Cu3(bpy)2Ln2(ip)6(H2O)5] [Ln = Yb (2 a), Gd (2 b), Tb (2 c)], and [Cu3Ln2(ip)6] [Ln = Eu (3 a), Gd (3 b)] have been synthesized hydrothermally by the reaction of the combination of 3d–4f metal centers and N-/O-donor ligands. X-ray diffraction analyses reveal that polymers 1 a–c and 2 a–c, as well as 3 a, b are isomorphous in structure. Polymers 1 a–c consist of 3D α-Po networks based on a inorganic rod-shaped secondary building units (SBUs) of {Er6Cu2(bipy)2(O2C)11} which are 27.03 Å in length. Polymers 2 a–c also contain 3D α-Po networks, constructed from shorter (14.79 Å) but similarly rod-shaped SBUs of {Yb2Cu3(bpy)2(O2C)12}. The structure also contains hydrogen-bonded (H2O)6 chains which can be reversibly dehydrated/rehydrated. Polymers 3 a, b contain metal carboxylate substructures which have 2D (6,3) topologies; these layers are bridged by the ip2− ligands to give an overall 3D network which contains two sorts of cavities. This series of Ln–Cu coordination polymers are further characterized by antiferromagnetic behavior.
Co-reporter:Feng Luo, Ji-min Zheng and Stuart R. Batten
Chemical Communications 2007(Issue 36) pp:NaN3746-3746
Publication Date(Web):2007/07/03
DOI:10.1039/B706177C
Via solvothermal synthesis, the self-assembly of CuCl2, 1,3,5-benzenetricarboxylic acid, and N,N′-bis(4-pyridylformamide)-1,4-benzene in DMF generated a novel coordination polymer containing an unprecedented (3,4)-connected network; 3-fold interpenetration and considerable solvent-accessible cavities occupied by reversible guest water molecules were also observed.
