Co-reporter:Ya-Qiu Sun, Shang-Yuan Liu, Yan-Yan Xu, Lin Wu, Dong-Zhao Gao, Guo-Ying Zhang, Dai-Zheng Liao
Polyhedron 2014 Volume 74() pp:39-48
Publication Date(Web):28 May 2014
DOI:10.1016/j.poly.2014.02.035
Six new coordination polymers, [Co(NiL)(aipt)] (1), [Co2(ML)(hipt)2(CH3OH)(H2O)]·CH3OH (M = Cu (2), Ni (3)), [Co2(C2O4)2(CuL)2] (4), [Co4(NiL)4(ipt)4(H2O)2] (5) and [Co(CuL)(tpt)] (6) (H2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclo-pentadeca-7,13-dien; H2aipt = 5-aminoisophthalic acid; H2hipt = 5-hydroxyisophthalic acid; H2ipt = isophthalic acid; H2tpt = terephthalic acid), have been synthesized by a solvothermal method and characterized by single-crystal X-ray diffraction. Complexes 1, 4 and 5 exhibit different infinite chain structures formed by CoNi (1), Co2Cu2 (4), Co4Ni4 (5) units, respectively, via oxamide and diverse carboxylate bridges, while complexes 2, 3 and 6 exhibit different two-dimensional network structures formed by Co2M or Co2M2 units via oxamide and 5-hydroxyisophthalate or terephthalate bridges. The results of magnetic determination show weak antiferromagnetic interactions in 1–3 and 5–6, and the spin–orbit coupling interaction of Co(II) is a primary factor in the magnetic behaviors.Six heterometallic coordination polymers containing cobalt(II), CoNi (1), Co2Cu (2), Co2Ni (3), Co2Cu2 (4), Co4Ni4 (5) and CoCu (6), have been synthesized with macrocyclic oxamide and aromatic multicarboxylate (including aipt2−, hipt2−, ipt2− and tpt2−) ligands, structurally determined and magnetically studied.
Co-reporter:Yu-Zhang Tong, Qing-Lun Wang, Ai-Ping Zhang, Yue Ma, Shi-Ping Yan, Guang-Ming Yang, Peng Cheng, Dai-Zheng Liao
Inorganic Chemistry Communications 2013 Volume 32() pp:32-36
Publication Date(Web):June 2013
DOI:10.1016/j.inoche.2013.03.015
•Two 3d-4f complexes were synthesized and structurally characterized.•An approximate method was used to interpret the magnetic behavior.•Different architectures can be formed by β-diketonate ligand cleaving or not.Two new complexes, [MnIIILDyIII(hfac)2(CF3COO)(H2O)][DyIII(hfac)3(CF3COO)(H2O)]·2CHCl3 (1) and [MnIIIL(H2O)][TbIII(hfac)4]·CHCl3 (2) [L = N,N'-ethylene-bis(3-methoxy-salicylideneiminate), hfac = hexafluoroacetylacetone] were synthesized and structural characterized by X-ray single-crystal diffraction. The magnetic analysis was carried out by using the Hamiltonian of Ĥ = ΔĴz2 for lanthanide ions and Ĥ = DŜz2 for Mn(III) ion, and the best fitting gives D = ± 2.98 cm− 1, Δ = − 0.0014 cm− 1, zJ′ = − 0.017 cm− 1, gDy = 1.37, gMn = 2.02 for complex 1 and D = ± 0.23 cm− 1, Δ = 0.0034 cm− 1, gTb = 1.52, gMn = 1.99 for complex 2.Two new 3d-4f heterometal complexes were synthesized and structurally characterized. The magnetic analysis was carried out by using the Hamiltonian of Ĥ = ΔĴz2 for lanthanide ions and the magnetic studies reveal that a weak antiferromagnetic interaction may be exist between the Dy(III) ion and Mn(III) ion in complex 1.
Co-reporter:Na Xu;Chao Wang;Wei Shi;Shi-Ping Yan;Peng Cheng
European Journal of Inorganic Chemistry 2011 Volume 2011( Issue 15) pp:2387-2393
Publication Date(Web):
DOI:10.1002/ejic.201100022
Abstract
By using multidentate ligand 2-hydroxynicotinic acid (H2nica), six new lanthanide coordination polymers [Sm(Hnica)(H2O)2SO4]n (1), {[Sm3(Hnica)6(H2O)6(OH)]·3H2O·SO4}n (2), [Eu(Hnica)(H2O)2SO4]n (3), {[Eu3(Hnica)6(H2O)6(OH)]·6H2O·SO4}n (4), {[Tb(Hnica)2(H2O)2]ClO4·H2O}n (5), and {[Dy(Hnica)2(H2O)2]ClO4·H2O}n (6) were synthesized and characterized by elemental analysis, IR spectra, and X-ray single-crystal diffraction. Compounds 1 and 3 exhibit a 1D Ln–O–Ln chain structure. Compounds 2 and 4 show a 2D Kagomé lattice structure, whereas 5 and 6 display a 2D rhombic grid structure. The luminescent properties of 1–6 at room temperature were studied. Direct-current (dc) magnetic susceptibility studies reveal antiferromagnetic interactions between LnIII ions in 1–6, and alternating-current (ac) magnetic susceptibility data of 6 suggests frequency-dependent out-of-phase signals below 5 K.
Co-reporter:Shi Ren, Shu-Lin Ma, Gong-Feng Xu, Bin Gu, Yue Ma, Qing-Lun Wang, Dai-Zheng Liao
Inorganic Chemistry Communications 2011 Volume 14(Issue 7) pp:1124-1127
Publication Date(Web):July 2011
DOI:10.1016/j.inoche.2011.04.004
The reaction of [Mo(CN)8]3− with Dy3+ in DMF solvent leads to a new binuclear complex, [Mo(CN)8Dy(DMF)4(H2O)3]·H2O (1) (DMF = N,N′-dimethylformamide). Magnetic measurements confirm that 1 presents probably a ferromagnetic interaction between the binuclear complexes.Construct a binuclear MoV–DyIII complex, in which the coordination sphere of Dy and Mo atoms lie in a slightly distorted trigonal dodecahedron geometry and linked by cyanide group.Research Highlights► Magnetic analysis. ► The magnetic anisotropy of DyIII ion. ► The progressive depopulation of excited Stark sublevels of DyIII ion.
Co-reporter:Gong-Feng Xu, Qing-Lun Wang, Patrick Gamez, Yue Ma, Rodolphe Clérac, Jinkui Tang, Shi-Ping Yan, Peng Cheng and Dai-Zheng Liao
Chemical Communications 2010 vol. 46(Issue 9) pp:1506-1508
Publication Date(Web):23 Dec 2009
DOI:10.1039/B920215C
A unique purely lanthanide-based single-molecule magnet (SMM) with an oxalate bridge has been designed through a rational synthetic approach. This strategy opens up new opportunities to design SMMs through the premeditated choice of a blocking ligand and suitable oxalate bridge.
Co-reporter:Yue Ma, Gong-Feng Xu, Xi Yang, Li-Cun Li, Jinkui Tang, Shi-Ping Yan, Peng Cheng and Dai-Zheng Liao
Chemical Communications 2010 vol. 46(Issue 43) pp:8264-8266
Publication Date(Web):07 Oct 2010
DOI:10.1039/C0CC01423K
Utilization of the strong electron-withdrawing ligand, hfac, leads to a novel dinuclear dysprosium single-molecule magnet featuring a pyrazine bridge with a large anisotropic barrier.
Co-reporter:Chun Yang ; Qing-Lun Wang ; Yue Ma ; Guo-Tao Tang ; Dai-Zheng Liao ; Shi-Ping Yan ; Guang-Ming Yang ;Peng Cheng
Inorganic Chemistry 2010 Volume 49(Issue 5) pp:2047-2056
Publication Date(Web):January 12, 2010
DOI:10.1021/ic901600v
Three complexes, [Mn(salphen)(H2O)]2[Fe(CN)5(NO)]·2CH3OH (1) (salphen = N,N′-phenylenebis(salicylideneiminato) dianion), [Mn(naphtmen)(CH3OH)]2[Fe(CN)5(NO)] (2) (naphtmen = N,N′-(1,1,2,2-tetramethylethylene)bis(naphthylideneiminato) dianion), and {[Mn(salen)]2[Fe(CN)5(NO)]·H2O}n (3) (salen = N,N′-ethylene-bis(salicylideneiminato) dianion), were synthesized and structurally characterized by X-ray single-crystal diffraction. The structural analyses show that complexes 1 and 2 consist of the discrete linear trinuclear [Mn(SB)]2[Fe(CN)5(NO)] units (SB = salphen for 1, naphtmen for 2); in complex 3, the nitroprusside anion coordinates to the axial sites of the four [Mn(salen)]+ entities through its four cyano nitrogen atoms, providing a two-dimensional network. The magnetic analysis indicates that the nitroprusside bridging ligand propagates a very weak antiferromagnetic exchange and single-ion anisotropy (D) plays an important role in the overall magnetic properties. Different from complexes 2 and 3, complex 1 shows a typical spin-flop transition with a critical field of 20 kOe.
Co-reporter:Yu-Zhang Tong, Qing-Lun Wang, Guang Yang, Guang-Ming Yang, Shi-Ping Yan, Dai-Zheng Liao and Peng Cheng
CrystEngComm 2010 vol. 12(Issue 2) pp:543-548
Publication Date(Web):01 Oct 2009
DOI:10.1039/B914208H
Five hexanuclear oxo-hydroxo lanthanide clusters are synthesized by hydrolysis of the lanthanide ions together with 4-amido-3,5-dimethyl-1,2,4-triazole (L). They all have a [Ln6(µ6–O)(µ3–OH)8]8+ core structure and the triazole groups stabilize the core structure in different fashions. The oxo group functions as an anion template to induce the self-assembly of lanthanide ions.
Co-reporter:Chao Wang;Yue Ma;Xi Yang;Shiping Yan ;Daizheng Liao
Chinese Journal of Chemistry 2010 Volume 28( Issue 9) pp:1593-1599
Publication Date(Web):
DOI:10.1002/cjoc.201090270
Abstract
A new biradical di(4-(1′-oxyl-3′-oxido-4′,4′,5′,5′-tetramethyl-4′,5′-dihydro-1′H-imidazol-2′-yl)phenyl) ether (1) and its copper complex 2 were synthesized and characterized structurally. The X-ray structure determination revealed that, the complex is in the triclinic P-1 space group and displays a ladder-like structure. Each copper atom is surrounded by four oxygen atoms from hexafluoroacetylacetone and two oxygen atoms from biradical. The magnetic measurements show that biradical 1 exhibits a weak intramolecular nitroxide-nitroxide antiferromagnetic coupling and copper complex 2 possesses weak ferromagnetic coupling (J=5.09 cm−1) between CuII and radical, which attributed to interaction between copper spin and the axially coordinated nitronyl nitroxide spin.
Co-reporter:Na Zhou, Yue Ma, Chao Wang, Gong-Feng Xu, Jinkui Tang, Shi-Ping Yan, Dai-Zheng Liao
Journal of Solid State Chemistry 2010 Volume 183(Issue 4) pp:927-932
Publication Date(Web):April 2010
DOI:10.1016/j.jssc.2010.02.012
Three Radical–Ln(III)–Radical complexes based on nitronyl nitroxide radicals have been synthesized, structurally and magnetically characterized: [Gd(hfac)3(NITPhOEt)2] (1) (hfac=hexafluoroacetylacetonate, and NITPhOEt=4′-ethoxy-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide), [Gd(hfac)3(NITPhOCH2Ph)2] (2) (NITPhOCH2Ph=4′-benzyloxy-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) and [Lu(hfac)3(NITPhOCH2Ph)2] (3). The X-ray crystal structure analyses show that the structures of the three compounds are similar and all consist of the isolated molecules, in which central ions GdIII or LuIII are coordinated by six oxygen atoms from three hfac and two oxygen atoms from nitronyl radicals. The magnetic studies show that in both of the two GdIII complexes, there are ferromagnetic GdIII–Rad interactions and antiferro-magnetic Rad–Rad interactions in the molecules (with JRad−Gd=0.27 cm−1, jRad–Rad=−2.97 cm−1 for 1: and JRad−Gd=0.62 cm−1, jRad–Rad=−7.01 cm−1 for 2). An analogous complex of [Lu(hfac)3 (NITPhOCH2Ph)2] (3) containing diamagnetic LuIII ions has also been introduced for further demonstrating the nature of magnetic coupling between radicals.Two tri-spin complexes based on gadolinium-radical have been synthesized and characterized, the magnetic studies show that in the two complexes the Gd–radical interaction is ferromagnetic and the radical–radical interaction is antiferromagnetic. An analogous complex containing the diamagnetic LuIII ions has also been synthesized to further demonstrate the nature of the magnetic coupling between radicals.
Co-reporter:Shu-Lin Ma;Shi Ren;Yue Ma
Journal of Inorganic and Organometallic Polymers and Materials 2010 Volume 20( Issue 2) pp:229-234
Publication Date(Web):2010 June
DOI:10.1007/s10904-010-9359-4
A novel MoV–YbIII bimetallic chain, {[YbIII(bpy)2(DMF)(H2O)][MoV(CN)8]·0.5bpy·4.5H2O}n (1) (DMF = N,N′-dimethylformamide; bpy = 2,2′-bipyridine), has been constructed by the reaction of [Mo(CN)8]3− with Yb3+ and 2,2′-bipyridine. Complex 1 is confirmed as a host–guest supramolecular structure by X-ray structural analysis. The neighboring chains interact with each other with two types of hydrogen bonds and two types of π···π interactions. Thus complex 1 has a unique 3D network. Magnetic analysis of 1 indicates the presence of a strong YbIII single-ion effect owing to spin–orbital coupling within this system.
Co-reporter:Jin-Xia Xu, Yue Ma, Dai-zheng Liao, Gong-Feng Xu, Jinkui Tang, Chao Wang, Na Zhou, Shi-Ping Yan, Peng Cheng and Li-Cun Li
Inorganic Chemistry 2009 Volume 48(Issue 18) pp:8890-8896
Publication Date(Web):August 19, 2009
DOI:10.1021/ic901169p
Five new complexes based on rare-earth-radical [Ln(hfac)3(NIT-5-Br-3py)]2 (Ln = Pr (1), Sm (2), Eu (3), Tb (4), Tm (5); hfac = hexafluoroacetylacetonate; NIT-5-Br-3py = 2-(4,4,5,5-tetramethyl-3-oxylimidazoline-1-oxide)-5-bromo-3-pyridine) have been synthesized and characterized by X-ray crystal diffraction. The single-crystal structures show that these complexes have similar structures, in which a NIT-5-Br-3py molecule acts as a bridging ligand linking two Ln(III) ions through the oxygen atom of the N−O group and nitrogen atom from the pyridine ring to form a four-spin system. Both static and dynamic magnetic properties were measured for complex 4, which exhibits single-molecule magnetism behavior.
Co-reporter:Na Zhou, Yue Ma, Chao Wang, Gong Feng Xu, Jin-Kui Tang, Jin-Xia Xu, Shi-Ping Yan, Peng Cheng, Li-Cun Li and Dai-Zheng Liao
Dalton Transactions 2009 (Issue 40) pp:8489-8492
Publication Date(Web):17 Aug 2009
DOI:10.1039/B908639K
A mononuclear tri-spin single-molecule magnet based on the rare earth radical [Tb(hfac)3(NITPhOEt)2] (NITPhOEt = 4′-ethoxy-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized, structurally characterized and the alternating current signals show a slow relaxation of magnetization and frequency-dependent signals.
Co-reporter:Yang Guo, Zhan-Quan Liu, Bin Zhao, Yu-Hua Feng, Gong-Feng Xu, Shi-Ping Yan, Peng Cheng, Qing-Lun Wang and Dai-Zheng Liao
CrystEngComm 2009 vol. 11(Issue 1) pp:61-66
Publication Date(Web):26 Sep 2008
DOI:10.1039/B809381D
Two new cyanide-bridged heterobimetallic coordination polymers constructed by using the [Au(CN)2]− building block, {Cd(bipy)[Au(CN)2]2}n (1) and {{Cd(phen)[Au(CN)2]2(H2O)}·iPrOH}n (2) (bipy = 2,2′-bipyridine, phen = 1,10-phenanthroline), have been synthesized and characterized. Complex 1 with chiral P3112 space group exhibits a novel three-fold interpenetrating quartz-like 3-D network, which is completely unsupported by aurophilic interactions, while complex 2 with the replacement of bipy by phen shows C2/c space group and features the 1-D zigzag chain structure and an extended supramolecular 2-D array in which aurophilic interactions may play an important role in sustaining the supramolecular solid-state architectures. 1 and 2 feature various networks most likely due to the different steric hindrances of the bipy and phen ligands. In addition, the solid state photoluminescence spectrum of complex 2 exhibits a strong green emission band (λmax = 524 nm) at room temperature.
Co-reporter:Ya-Qiu Sun;Dong-Zhao Gao;Wen Dong;Chen-Xi Zhang
European Journal of Inorganic Chemistry 2009 Volume 2009( Issue 32) pp:
Publication Date(Web):
DOI:10.1002/ejic.200900967
No abstract is available for this article.
Co-reporter:Ya-Qiu Sun;Dong-Zhao Gao;Wen Dong;Chen-Xi Zhang
European Journal of Inorganic Chemistry 2009 Volume 2009( Issue 19) pp:2825-2834
Publication Date(Web):
DOI:10.1002/ejic.200801231
Abstract
Five complexes with the formula {[(CuL)2Cr(μ-SCN)2]OH}n (1), [Mn(CuL)2(NCS)2] (2), [Cu(CuL)2(NCS)2] (3), [Ni(CuL)2(NCS)2] (4) and [Co(CuL)(NCS)2(CH3OH)2]2 (5), (H2L = 2,3-dioxo-5,6,14,15-dibenzo-1,4,8,12-tetraazacyclopentadeca-7,13-diene) were synthesized and structurally determined. The structure of 1 has oxamido-bridged trinuclear [CrIIICuII2] units and consists of a 1D helical chain formed by the linking of copper(II) and chromium(III) ions through the oxamido and μ1,3-NCS bridges. The structure of 2, 3 or 4 consists of oxamido-bridged trinuclear [MIIICuII2] molecules (for 2–4, M = Mn, Cu, Ni, respectively) and arranges in a 1D zig-zag chain. Complex 5 is a composed of a tetranuclear [CoII2CuII2] molecule with both the oxamido and μ1,3-NCS bridges. The variable-temperature magnetic susceptibility measurements (2–300K) of 1, 2, 4 and 5 show pronounced antiferromagnetic interactions between the copper(II) atom and neighbouring metal ions.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Co-reporter:Yuhua Feng, Chao Wang, Yafan Zhao, Jun Li, Daizheng Liao, Shiping Yan, Qinglun Wang
Inorganica Chimica Acta 2009 Volume 362(Issue 10) pp:3563-3568
Publication Date(Web):1 August 2009
DOI:10.1016/j.ica.2009.03.048
Four MnIII quadridentate Schiff-base compounds have been prepared and structurally characterized: [Mn(salpn)(CH3OH)2]BPh4 (1), [Mn2(salpn)2(N3)2] (2), [Mn2(salpn)2(NCS)2] (3), [Mn2(salpn)2(H2O)2](H2O)(ClO4)2 (4) (salpn = N,N′-(1,2-propylene)-bis-(salicylideneiminate)). Among them, 1 is a discrete MnIII monomeric complex with a square-bipyramidal geometry. Complexes 2, 3 and 4 form the similar phenolate-bridged out-of-plane dimers. Magnetic susceptibility studies reveal that 2, 3 and 4 all exhibit ferromagnetic intra-dimer coupling between MnIII ions.Four new MnIII quadridentate Schiff-base compounds have been reported. Except the monomeric structure of 1, 2, 3 and 4 all form out-of-plane dimeric structure and exhibit ferromagnetic intra-dimer coupling between MnIII ions. The electronic spectra and cyclic voltammogram behavior of the four complexes were also studied.
Co-reporter:Shu-Lin Ma;Shi Ren;Yue Ma;Shi-Ping Yan
Structural Chemistry 2009 Volume 20( Issue 1) pp:145-154
Publication Date(Web):2009 February
DOI:10.1007/s11224-008-9383-y
The reaction between K3[Mo(CN)8] · H2O and MnCl2 · 4H2O in different reaction conditions have obtained three new bimetallic cyanide-bridged compounds, namely, {(tetrenH2)0.5[Mn(H2O)2][MoV(CN)8] · 2H2O}n (1) (where, tetren is tetraethylenepentamine), {[Mn2(H2O)4][MoIV(CN)8] · 3H2O}n (2), and {[Mn2(H2O)4][MoIV(CN)8] · 4H2O}n (3). Compound 1 crystallizes in the orthorhombic system with space group Cmc21 and unit cell constants a = 7.8234(15), b = 26.013(5), c = 10.021(2) Å, β = 90°, and Z = 4. Compound 2 crystallizes in the monoclinic system with space group P21/n and unit cell constants a = 7.3329(11), b = 14.372(2), c = 18.070(3) Å, β = 90.869(2)°, and Z = 4. Compound 3 crystallizes in the tetragonal system with space group I4/m and unit cell constants a = b = 11.9371(8), c = 13.2930(18) Å, β = 90°, and Z = 4. X-ray single-crystal structures reveal that the Mo centers adopt a distorted square antiprism coordination environment for 1 and 3, while 2 closed to a bicapped trigonal prism. For these complexes, all the MnII centers in the extended structure adopt distorted octahedron geometry. For 1, each MoV coordinated via four cyanide groups to four MnII ions, and the other four cyanide groups are terminal, forming a two-dimensional framework. For 2, the MoIV center of structural unit coordinated via four cyanide groups to four Mn(1), and the other four cyanide groups coordinated to four Mn(2), forming a three-dimensional framework. For 3, each [MoIV(CN)8]4− building block is linked to MnII ions through its eight CN ligands, and each MnII center is connected to four Mo units forming a three-dimensional framework. In addition, magnetic studies of these complexes have also been presented.
Co-reporter:Shu-Lin Ma;Shi Ren;Yue Ma
Journal of Chemical Sciences 2009 Volume 121( Issue 4) pp:421-427
Publication Date(Web):2009 July
DOI:10.1007/s12039-009-0049-0
The reaction of [Mo(CN)8]3− with Sm3+ and 2,2′-bipyridine (bpy) lead to a sheet-like bimetallic complex, {Sm(H2O)9[Sm2(bpy)2(OH)2·75(NO3)0·25][Mo(CN)8]2}n (1) in EtOH/H2O mixture solvent. The complex 1 crystallizes in monoclinic, space group C2/c. The structural investigation denotes that the layers interaction with each other by π-π stacks and hydrogen bonds result in a 3D network, containing Sm(H2O)93+ as guest molecules in the holes. The magnetic behaviour of the complex 1 has been studied.
Co-reporter:Shu-Lin Ma;Shi Ren;Yue Ma;Shi-Ping Yan
Structural Chemistry 2009 Volume 20( Issue 2) pp:161-167
Publication Date(Web):2009 April
DOI:10.1007/s11224-009-9408-1
A cyanide-bridged bimetallic octacyanomolybdate(V)-based polynuclear cluster, {Mn9II[MoV(CN)8]6(EtOH)24} · 6EtOH · 3i-C3H7OH · 3H2O (1), has been prepared by self-assembling of [Mo(CN)8]3− and Mn2+ ions. The compound crystallized in the trigonal system with space group R-3 and cell dimensions of a = b = 26.182(15), c = 25.586(14) Å, γ = 120°, and Z = 18. The structure of the complex consists of neutral cluster of 15 metal ions, in which all metal ions are linked by cyanide bridged ligands. Magnetic susceptibilities and magnetization measurements of the complex indicate that the cluster has an S = 39/2 ground state. The intracluster ferrimagnetic interaction has been characterized as well.
Co-reporter:Na Xu ; Wei Shi ; Dai-Zheng Liao ; Shi-Ping Yan ;Peng Cheng
Inorganic Chemistry 2008 Volume 47(Issue 19) pp:8748-8756
Publication Date(Web):August 23, 2008
DOI:10.1021/ic800623v
Lanthanide coordination polymers were synthesized from Pr(III), Nd(III), and Gd(III) salts; 2-hydroxynicotinic acid (Hnica); and MnSO4·H2O under hydrothermal conditions. In the absence of (CH3)3CCOONa, 1D polymers with an infinite Ln(III)−O−Ln(III) chain structure, [Pr(Hnica)(H2O)2SO4]n (1), [Nd(Hnica)(H2O)2SO4]n (2), and [Gd(Hnica)(H2O)2SO4]n (3), were generated. When (CH3)3CCOONa was added to the synthetic systems, 2D coordination polymers {[Pr3(Hnica)6(H2O)9]·3H2O·SO4·NO3}n (4), {[Nd3(Hnica)6(H2O)9]·3H2O·SO4·NO3}n (5), and {[Gd(Hnica)2(H2O)2]ClO4·H2O}n (6) were obtained. Complexes 4 and 5 both exhibit Kagomé lattice structure, while 6 displays a rhombic grid structure. All complexes were characterized by elemental analysis, IR spectra, UV−vis spectra, and X-ray single-crystal diffraction. The variable-temperature magnetic susceptibility studies reveal ferromagnetic interactions between gadolinium(III) ions in 3 and 6 and antiferromagnetic interactions in 1, 2, 4, and 5.
Co-reporter:Shu-Lin Ma, Yue Ma, Shi Ren, Shi-Ping Yan, Peng Cheng, Qing-Lun Wang and Dai-Zheng Liao
Crystal Growth & Design 2008 Volume 8(Issue 10) pp:3761-3765
Publication Date(Web):August 29, 2008
DOI:10.1021/cg800392a
The reaction between Cs3[Mo(CN)8]·2H2O and MnCl2·4H2O gives two new cyano-bridged bimetallic compounds of ([Mn2II(H2O)2(CH3COO)][MoV(CN)8]·2H2O)n (1) and ([Mn2II(H2O)3Cl][MoV(CN)8]·4H2O)n (2) in different conditions. The magnetic behaviors of these complexes have been investigated, indicating that 1 is a ferrimagnet with an ordering temperature of about 6 K and that for 2 there is antiferromagnetic coupling between the paramagnetic ions in the system.
Co-reporter:Jin-Xia Xu, Yue Ma, Gong-Feng Xu, Chao Wang, Dai-Zheng Liao, Zong-Hui Jiang, Shi-Ping Yan, Li-Cun Li
Inorganic Chemistry Communications 2008 Volume 11(Issue 11) pp:1356-1358
Publication Date(Web):November 2008
DOI:10.1016/j.inoche.2008.09.006
A novel complex, [Gd(hfac)3(NIT-5-Br-3py)]2 (hfac = hexafluoroacetylacetonat, NIT-5-Br-3py = 2-(4,4,5,5-tetramethyl-3-oxylimidazoline-1-oxide)-5-bromo-3-pyridine) has been synthesized and characterized structurally and magnetically, in which a NIT-5-Br-3py molecular acts as a bridge ligand linking two Gd(III) ions through the oxygen atom of the N–O group and nitrogen atom from the pyridine ring to form a four-spin system. The fitting result of the magnetic susceptibility shows two different magnetic interactions between Gd(III) ion and NIT-5-Br-3py in one complex: a weak ferromagnetic interaction (J1 = +2.60 cm−1) through the N–O group, and a much weaker antiferromagnetic (J2 = −0.24 cm−1) interaction through pyridine ring.In this paper, we present the synthesis, structure and magnetic property of a novel Gd(III) complex [Gd(hfac)3(NIT-5-Br-3py)]2, in which a NIT-5-Br-3py molecular acts as a bridging ligand linking two Gd(III) ions through the oxygen atom of the N–O group and nitrogen atom from the pyridine ring to form a four-spin system. It is worth noting that there are two different magnetic interactions between Gd(III) ion and NIT-5-Br-3py in one complex: a weak ferromagnetic interaction through the N–O group, and a much weaker antiferromagnetic interaction through pyridine ring.
Co-reporter:Gong-Feng Xu, Qing-Lun Wang, Patrick Gamez, Yue Ma, Rodolphe Clérac, Jinkui Tang, Shi-Ping Yan, Peng Cheng and Dai-Zheng Liao
Chemical Communications 2010 - vol. 46(Issue 9) pp:NaN1508-1508
Publication Date(Web):2009/12/23
DOI:10.1039/B920215C
A unique purely lanthanide-based single-molecule magnet (SMM) with an oxalate bridge has been designed through a rational synthetic approach. This strategy opens up new opportunities to design SMMs through the premeditated choice of a blocking ligand and suitable oxalate bridge.
Co-reporter:Yue Ma, Gong-Feng Xu, Xi Yang, Li-Cun Li, Jinkui Tang, Shi-Ping Yan, Peng Cheng and Dai-Zheng Liao
Chemical Communications 2010 - vol. 46(Issue 43) pp:NaN8266-8266
Publication Date(Web):2010/10/07
DOI:10.1039/C0CC01423K
Utilization of the strong electron-withdrawing ligand, hfac, leads to a novel dinuclear dysprosium single-molecule magnet featuring a pyrazine bridge with a large anisotropic barrier.
Co-reporter:Na Zhou, Yue Ma, Chao Wang, Gong Feng Xu, Jin-Kui Tang, Jin-Xia Xu, Shi-Ping Yan, Peng Cheng, Li-Cun Li and Dai-Zheng Liao
Dalton Transactions 2009(Issue 40) pp:NaN8492-8492
Publication Date(Web):2009/08/17
DOI:10.1039/B908639K
A mononuclear tri-spin single-molecule magnet based on the rare earth radical [Tb(hfac)3(NITPhOEt)2] (NITPhOEt = 4′-ethoxy-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide) has been synthesized, structurally characterized and the alternating current signals show a slow relaxation of magnetization and frequency-dependent signals.
