Ping Liu

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Name: 刘萍

Organization: Northwest University , China

Department: College of Chemistry & Materials Science

Title: NULL(PhD)

TOPICS

Polymer

Atom Transfer Radical Polymerization Radical Polymerization

Inorganic Chemistry

Metal Organic Frameworks

Chemicals
References

Effect of Coordinated Solvent Molecules on Metal Coordination Sphere and Solvent-Induced Transformations

Co-reporter:Wen-Qian Zhang, Wen-Yan Zhang, Rui-Dong Wang, Chun-Yan Ren, Quan-Quan Li, Yan-Ping Fan, Bin Liu, Ping LiuYao-Yu Wang

Crystal Growth & Design 2017 Volume 17(Issue 2) pp:

Publication Date(Web):December 28, 2016

DOI:10.1021/acs.cgd.6b01366

Four similar Mn(II) metal–organic frameworks (MOFs), {[Mn2(nbtc)(H2O)2(S)]·S·0.5H2O}n [S = DMF (1), DMA (2), NMP (3), DEF (4)] (DMF = N,N′-dimethylformamide, DMA = N,N′-dimethylacetamide, NMP = N-methyl-2-pyrrolidinone, DEF = N,N′-diethylformamide), have been assembled solvothermally from the nitro and carboxyl doubly functionalized ligand 6,6′-dinitro-2,2′,4,4′-biphenyl tetracarboxylic acid (H4nbtc) and characterized by single-crystal X-ray diffraction, elemental analyses, infrared spectroscopy, thermogravimetric analyses, and powder X-ray diffraction. All MOFs exhibit unique three-dimensional double-walled open-frameworks with one-dimensional parallelogram channels and have guest/coordinated water and carbonyl solvent molecules, reasonably providing a good example of the competitive behavior of water and carbonyl solvent molecules and an excellent candidate for studying the single crystal coordinated solvent exchange transformations. Interestingly, because of the different steric hindrance of the series of coordinated carbonyl solvent molecules, the MOFs’ structural differences primarily display on the coordination mode of O1W and coordination sphere of Mn1/Mn2 between MOFs 1(4) and 2(3). And it is also found that a small variation of the lattice parameters, unit cell volume, and density occurs. Furthermore, MOFs 1–3 show solvent-induced single-crystal-to-single-crystal (SCSC) transformations, which only exchange coordinated and guest carbonyl solvent molecules (DMF, DMA, NMP). And fortunately, the available single crystal data of 2′ and 2″ have been collected, which were obtained by soaking 1 and 3 in DMA solution for 5 days and 7 days respectively, and they have the same molecular formula as 2 but slightly different structures from 2. In such transformations, the complete solvent exchanging time discrimination of 2 to 3 (10 days), 3 to 2 (7 days), 3 to 1 (5 days), 1 to 2 (5 days), and 2 to 1 (3 days) is susceptible to the size of carbonyl solvent molecules (NMP > DMA > DMF), and the metal coordination sphere of SCSC regenerated samples is influenced not only by the character of coordinated carbonyl solvents but also the nature of mother crystals. In addition, MOFs 1–4 exhibit antiferromagnetic coupling, confirmed through magnetic susceptibility measurements.

Two 1D Looped Coordination Polymers as Luminescent Probes for Highly Selective Sensing of Fe3+ Ions

Co-reporter:Yan-Ping Fan;Yi-Fan Kang;Xi-Qiang Liang

Journal of Inorganic and Organometallic Polymers and Materials 2017 Volume 27( Issue 5) pp:1376-1382

Publication Date(Web):06 June 2017

DOI:10.1007/s10904-017-0591-z

Two luminescent coordination polymers (LCPs), namely [CdL2]n (1) and [ZnL2]n (2) based on a new ligand 2-(2-methyl–benzimidazole-1-yl)-benzoic acid (HL), have been synthesized and characterized by single crystal X-ray diffraction, powder X-ray diffraction, infrared spectroscopy, elemental analysis, and thermogravimetric analysis. 1 and 2 exhibit similar 1D looped chains with different coordination modes of L. Both LCPs show strong fluorescent emission in the visible region. The fluorescence quenching response of 1 and 2 towards Fe3+ over other metal ions in DMF has been demonstrated by quenching titrations. Thus, 1 and 2 can be used as potential and highly selective luminescent sensors for Fe3+ ions.

Reaction-determined assemblies of 0D to 3D complexes: structural diversities and luminescence properties

Co-reporter:Quan-Quan Li, Wen-Qian Zhang, Chun-Yan Ren, Yan-Ping Fan, Jian-Li Li, Ping Liu and Yao-Yu Wang

CrystEngComm 2016 vol. 18(Issue 19) pp:3358-3371

Publication Date(Web):09 Mar 2016

DOI:10.1039/C6CE00273K

Reaction-determined assemblies of 6,6′-dinitrobiphenyl-2,2′,4,4′-tetracarboxylic acid (H4nbtc), various N-donor ligands and transition metal ions produce ten complexes, namely, [Zn2(nbtc)(bpa)·H2O]n (1), [Zn2(nbtc)(bpe)·H2O]n (2), [Zn2(nbtc)(2,2′-dpy)]n (3), Zn(H3nbtc)(phen)2 (4), {(H3O)2[Cd3(nbtc)2(H2O)3]·5H2O}n (5), [Cd2(nbtc)(ndpy)·0.5H2O]n (6), [Ag2(H2nbtc)(bpp)]n (7), [Co2(nbtc)(phen)2(H2O)2]n (8), [Ni2(nbtc)(phen)2(H2O)2]n (9) and Co(H2nbtc)(phen)2·2H2O (10) (bpa = 1,2-bis(4-pyridyl)ethane, bpe = 1,2-di(4-pyridyl)ethylene, bpp = 1,3-bis(4-pyridyl)propane, 2,2′-dpy = 2,2′-dipyridyl, phen = 1,10-phenanthroline, ndpy = 2-pyridinamine). Isostructural 1 and 2 feature 3D “bilayered-pillared” frameworks constructed from Zn2(μ2-COO)2(μ1-COO)2-nbtc4− wave-bilayers and bpa/bpe pillars. Unlike 1 and 2, both 3 and 6 exhibit 3D “brick-wall” frameworks constructed from nbtc4− and various SBUs (0D Zn2(μ2-COO)3(μ1-COO)1 for 3, 1D [Cd2(μ2-COO)4]n for 6). However, 3D 5 can be viewed as a combination of 2D “brick-wall” layers and 1D [Cd3-nbtc] chains. Moreover, in comparison to neutral 3 and 6 with pensile and cosmetic terminal ligands, complex 5 without an N-donor ligand is particularly interesting, containing two hydronium ions to balance the anion unit [Cd3(nbtc)2(H2O)3]2− as well as three types of coordinated Cd(II) ions (6-, 7- and 8-). Unlike 3, complex 4 is mononuclear, despite the two complexes employing similar terminal ligands (2,2′-dpy for 3, phen for 4). In 2D layered Ag(I) 7, the 0D Ag4(μ2-COO)4 SBUs initially form Ag4(μ2-COO)4-H2nbtc2− chains before being bridged by bpp ligands. Isostructural Co(II) 8 and Ni(II) 9 exhibit 1D looped infinite chains. Structural comparisons indicate that the SBUs, the coordination modes of the H4nbtc ligand, the synthetic conditions and the nature of the N-donor ligands are crucial factors with respect to the structures of these compounds. Furthermore, the luminescence properties of 1–7 were investigated in the solid state at room temperature.

Solvent-dependent turn-on probe for dual monitoring of Ag+ and Zn2+ in living biological samples

Co-reporter:Zheng Yang, Mengyao She, Bing Yin, Likai Hao, Martin Obst, Ping Liu, Jianli Li

Analytica Chimica Acta 2015 Volume 868() pp:53-59

Publication Date(Web):8 April 2015

DOI:10.1016/j.aca.2015.01.052

•A solvent-dependent probe was presented for dual monitoring of Ag+ and Zn2+.•The probe exhibited special selectivity and sensitivity at physiological range.•The mechanism was investigated both experimentally and computationally.•The probe was highly suitable for mapping Ag+ and Zn2+ in biological samples.A novel, solvent-dependent “off–on” probe with benzoylthiourea moiety as the functional receptor and fluorescein as the fluorophore was designed for monitoring of Ag+ in EtOH–H2O (2:8, v/v) solution and Zn2+ in CH3CN–H2O (2:8, v/v) solution at physiological range with sufficient selectivity and sensitivity. The Ag+ promoted desulfurization of thiosemicarbazide functionality in formation of the 1,3,4-oxadiazole and the coordination of Zn2+ to the O atom and N atom of the spoirolactam moiety and the S atom of the benzoylthiourea moiety were investigated to be the power that promoted the fluorescent enhancement. This probe was tested highly suitable for mapping Ag+ and Zn2+ in living human osteosarcoma MG-63 cells and microbial cell–EPS–mineral aggregates, thus, providing a wonderful candidate for tracking Ag+ and Zn2+ in biological organisms and processes.

Reaction-controlled assemblies and structural diversities of seven Co(II)/Cu(II) complexes based on a bipyridine-dicarboxylate N-oxide ligand

Co-reporter:Quan-Quan Li, Yi-Fan Kang, Chun-Yan Ren, Guo-Ping Yang, Qing Liu, Ping Liu and Yao-Yu Wang

CrystEngComm 2015 vol. 17(Issue 4) pp:775-786

Publication Date(Web):30 Oct 2014

DOI:10.1039/C4CE02008A

Seven complexes, namely, {[Co2[(R,S)-bpdado]2(CH3CN)2(H2O)2]·2H2O}n1, {Cu[(R,S)-bpdado](H2O)}n2, {[Cu2[(R,S)-bpdado]2(H2O)2]·H2O}n2′, {[Cu(R,S)-bpdado]·EtOH}n2′′, {Cu[(R,S)-bpdado](phen)}2 (phen = 1,10-phenanthroline) 3, {Cu[(R,S)-bpdado](phen)(H2O)}2·8H2O 4 and {Cu[(R,S)-bpdado](dpy)(H2O)}2·4H2O (dpy = 2,2′-pyridine) 5, have been obtained via solvothermal or layered diffusional reaction based on an axially chiral ligand, (R,S)-2,2′-bipyridyl-3,3′-dicarboxylic acid-1,1′-dioxide ((R,S)-H2bpdado). These complexes tend to form under thermodynamic control in the crystallization process of complexes. Among them, 2′ and 2′′ were reported and obtained along with the preparation of 2. Five new complexes, 1–5, are characterized by single-crystal X-ray diffraction, elemental analyses, X-ray powder diffraction, and IR and thermogravimetric analyses. Four different structural complexes, 2D achiral layers 1, 2 and 2′′ and 1D nanotubular structure 2′, are constructed by the M3[(R,S)-bpdado] tecton (M = Co(II) or Cu(II)) in different arrangement modes. When various N-donor ligands are used, different binuclear complexes, 3–5, are assembled by the Cu2[(R,S)-bpdado] tecton in the same arrangement mode. Apart from the arrangement modes of the tecton, some other elements are also discussed, which influence the final structures, such as the coordination modes and conformations of (R,S)-bpdado, the different metal ions, the reaction temperature, the N-donor ligand and the solvent system.

Novel 3,6-unsymmetrically disubstituted-1,2,4,5-tetrazines: S-induced one-pot synthesis, properties and theoretical study

Co-reporter:Chen Li, Haixia Ge, Bing Yin, Mengyao She, Ping Liu, Xiangdong Li and Jianli Li

RSC Advances 2015 vol. 5(Issue 16) pp:12277-12286

Publication Date(Web):14 Jan 2015

DOI:10.1039/C4RA10808F

18 unprecedented tetrazines unsymmetrically substituted at C3 and C6 by an aromatic heterocycle have been successfully prepared by the S-induced reaction of aromatic nitriles with hydrazine hydrate under thermal conditions. The spectral property investigation suggests that compounds 4d, 4e, 4f, 4p, 4q, 4r, and 4v can display intense fluorescence in the visible region, and their fluorescent properties are affected by the substituents both in tetrazine and in phenyl rings. Moreover, the electrochemical behaviors of these synthesized tetrazines are demonstrated to be fully reversible. Furthermore, density functional theory (DFT) calculations for these compounds were performed to investigate their optimized structures, Fukui function and reactivity or selectivity in the inverse electron demand Diels–Alder reaction.

A novel Cu(II) MCCP based on 6,6′-dinitro-2,2′,4,4′-biphenyl tetracarboxylic acid: First coexistence of boat- and chair-shaped tetranuclear clusters

Co-reporter:Chun-yan Ren, Bin Liu, Wei-ping Wu, Ping Liu, Guo-ping Yang, Yi-Fan Kang, Yao-yu Wang

Inorganic Chemistry Communications 2015 Volume 53() pp:46-49

Publication Date(Web):March 2015

DOI:10.1016/j.inoche.2015.01.023

•The first use of H4nbtc ligand afford a novel 2D Cu(II) MCCP (1).•In 1 boat- and chair-shaped CuII4 clusters [Cu4(μ3-OH)2]6+ coexist unprecedentedly.•Variable-temperature magnetic investigations for 1 have been discussed.The first use of H4nbtc ligand afford a novel 2D Cu(II) metal-cluster-based coordination polymer (MCCP), [Cu4(nbtc)1.5(μ3-OH)2(H2O)4·8H2O (1) (H4nbtc = 6,6′-dinitro-2,2′,4,4′-biphenyl tetracarboxylic acid), in which the boat- and chair-shaped tetranuclear cooper (II) clusters [Cu4(μ3-OH)2]6+ coexist unprecedentedly. Interestingly, the chair-shaped CuII4 cluster-based 1D ladder chain perfectly threaded into the rectangle windows of the 2D grids constructed by boat-shaped CuII4 clusters and H4nbtc. And the magnetic property has also been investigated.The first use of H4nbtc ligand afforded a novel 2D Cu(II) MCCPs, in which the boat-shaped and chair-shaped CuII4 clusters [Cu4(μ3-OH)2]6 + coexist unprecedentedly. Interestingly, the chair-shaped CuII4 cluster-based 1D ladder chain threaded into the rectangle windows in the 2D grids formed by boat-shaped CuII4 clusters and nbtc ligands.

Thermally Triggered Solid-State Single-Crystal-to-Single-Crystal Structural Transformation Accompanies Property Changes

Co-reporter:Quan-Quan Li;Chun-Yan Ren;Yang-Yang Huang;Dr. Jian-Li Li;Dr. Ping Liu;Dr. Bin Liu;Yang Liu ;Dr. Yao-Yu Wang

Chemistry - A European Journal 2015 Volume 21( Issue 12) pp:4703-4711

Publication Date(Web):

DOI:10.1002/chem.201405984

Abstract

The 1D complex [(CuL_0.5H₂O)⋅H₂O]_n (1) (H₄L=2,2′-bipyridine-3,3′,6,6′-tetracarboxylic acid) undergoes an irreversible thermally triggered single-crystal-to-single-crystal (SCSC) transformation to produce the 3D anhydrous complex [CuL_0.5]_n (2). This SCSC structural transformation was confirmed by single-crystal X-ray diffraction analysis, thermogravimetric (TG) analysis, powder X-ray diffraction (PXRD) patterns, variable-temperature powder X-ray diffraction (VT–PXRD) patterns, and IR spectroscopy. Structural analyses reveal that in complex 2, though the initial 1D chain is still retained as in complex 1, accompanied with the Cu-bound H₂O removed and new O(carboxyl)Cu bond forming, the coordination geometries around the Cu^II ions vary from a distorted trigonal bipyramid to a distorted square pyramid. With the drastic structural transition, significant property changes are observed. Magnetic analyses show prominent changes from antiferromagnetism to weak ferromagnetism due to the new formed Cu1-O-C-O-Cu4 bridge. The catalytic results demonstrate that, even though both solid-state materials present high catalytic activity for the synthesis of 2-imidazolines derivatives and can be reused, the activation temperature of complex 1 is higher than that of complex 2. In addition, a possible pathway for the SCSC structural transformations is proposed.

Mixed Ligand CuIIN2O2 Complexes: Biomimetic Synthesis, Activities in Vitro and Biological Models, Theoretical Calculations

Co-reporter:Chen Li, Bing Yin, Yifan Kang, Ping Liu, Liang Chen, Yaoyu Wang, and Jianli Li

Inorganic Chemistry 2014 Volume 53(Issue 24) pp:13019-13030

Publication Date(Web):December 3, 2014

DOI:10.1021/ic5021548

Three new mixed ligand CuIIN2O2 complexes, namely, [CuII(2-A-6-MBT)2(m-NB)2] (1), [CuII(2-ABT)2(m-NB)2] (2), and [CuII(2-ABT)2(o-NB)2] (3), (2-A-6-MBT = 2-amino-6-methoxybenzothiazole, m-NB = m-nitrobenzoate, 2-ABT = 2-aminobenzothiazole, and o-NB = o-nitrobenzoate), have been prepared by the biomimetic synthesis strategy, and their structures were determined by X-ray crystallography studies and spectral methods. These complexes exhibited the effective superoxide dismutase (SOD) activity and catecholase activity. On the basis of the experimental data and computational studies, the structure–activity relationship for these complexes was investigated. The results reveal that electron-accepting abilities of these complexes and coordination geometries have significant effects on the SOD activity and catecholase activity. Then, we found that 1 and 2 exerted potent intracellular antioxidant capacity in the model of H2O2-induced oxidative stress based on HeLa cervical cancer cells, which were screened out by the cytotoxicity assays of different kinds of cells. Furthermore, 1–3 showed the favorable biocompatibility in two different biological models: Saccharomyces cerevisiae and human vascular endothelial cells. These biological experimental data are indicative of the promising application potential of these complexes in biology and pharmacology.

Series of Cd(II) and Pb(II) Coordination Polymers Based on a Multilinker (R,S-)2,2′-Bipyridine-3,3′-dicarboxylate-1,1′-dioxide

Co-reporter:Yi-Fan Kang, Jian-Qiang Liu, Bo Liu, Wen-Tao Zhang, Qing Liu, Ping Liu, and Yao-Yu Wang

Crystal Growth & Design 2014 Volume 14(Issue 11) pp:5466-5476

Publication Date(Web):September 26, 2014

DOI:10.1021/cg5006192

Six new metal–organic frameworks (MOFs) with structures ranging from a one-dimensional (1D) chain, two-dimensional (2D) layer, even 2D double layer to three-dimensional (3D) network based on 2,2′-bipyridine-3,3′-dicarboxylate-1,1′-dioxide (H2bpdado) and N-donor ligands (1,2-bis(4-pyridyl)ethane (bpa) or 1,2-trans-bis(4-pyridyl)ethene (bpe)), namely, [Cd(bpdado)(H2O)2]n (1), {[Cd2(bpdado)2(bpa)(H2O)2]·DMF·3H2O}n (2), {[Cd2(bpdado)2(bpe)(H2O)2]·8.5H2O}n (3), {[Pb2(bpdado)2(bpa)]·10H2O}n (4), {[Pb2(bpdado)2(bpe)]·10H2O}n (5), [Pb2(bpdado)Cl2(H2O)2]n (6), were synthesized by hydro(solvo)thermal and/or diffusion methods. In these complexes, the bpdado ligand shows four types of coordination modes, three of which appeared for the first time. Polymers 1–6 present diverse motifs with different metal ions and different conformations and/or coordination modes of bpdado, which may show a natural synergy in structural diversity of the resultant MOFs. Under the similar synthetic conditions just with different metals (Cd(II) and Pb(II)), 6 exhibits a 2D covalent grid layer, whereas complex 1 displays a 1D chain. Meanwhile, Cd(II) atom in 1 shows an unprecedented triangular prism coordination geometry. Although bpe/bpa ligands act as pillars between 2D [M(bpdado)]n layer subunits in complexes 2–5, the Cd(II)-based complexes 2 and 3 are extended into a 3D layered-pillared network, while the Pd(II)-based complexes 4 and 5 just exhibit the 2D double layers. Moreover, the 2D [Cd(bpdado)]n layer subunits of 2 and 3 can be derived from replacing hydrogen bonds in 1D 1 with coordination bonds dependent on different coordination modes of bpdado. In addition, the solid-state luminescence (for 1–6) and gas adsorption properties (for 2 and 3) have been studied and discussed in detail.

Copper-catalyzed intermolecular cyclization of nitriles and 2-aminobenzylamine for 3,4-dihydroquinazolines and quinazolines synthesis via cascade coupling and aerobic oxidation

Co-reporter:Cheng Li, Shujuan An, Yuelu Zhu, Jin Zhang, Yifan Kang, Ping Liu, Yaoyu Wang and Jianli Li

RSC Advances 2014 vol. 4(Issue 91) pp:49888-49891

Publication Date(Web):01 Oct 2014

DOI:10.1039/C4RA09240F

A copper-catalyzed cascade coupling and aerobic oxidation of aromatic nitriles and 2-aminobenzylamine for the synthesis of 3,4-dihydroquinazolines and quinazolineshas been achieved. The catalytic system, characterized by not adding additives and using molecular oxygen as the sole oxidant, exhibited exquisite substrate specificity and operated under mild conditions through inherently “green” processes.

High efficient probes with Schiff base functional receptors for hypochlorite sensing under physiological conditions

Co-reporter:Yang-Yang Huang, Meng-Jia Wang, Zheng Yang, Meng-Yao She, Shu Wang, Ping Liu, Jian-Li Li, Zhen Shi

Chinese Chemical Letters 2014 Volume 25(Issue 7) pp:1077-1081

Publication Date(Web):July 2014

DOI:10.1016/j.cclet.2014.05.011

A series of novel and convenient fluorescent probes with Schiff base functionality were presented for direct detection of OCl−via the irreversible OCl−-promoted oxidation and hydrolyzation reaction in formation of the ring-opened product, fluorescein. Prominent high sensitivity, selectivity and anti-interference OCl−-induced fluorescence and color change over a wide range of tested metal ions performance were observed for each probe under physiological conditions, thus making the probes well suitable for sensing of OCl− in living cells.A series of novel and convenient fluorescent probes with Schiff base functionality are presented for direct detection of OCl−via the irreversible OCl−-promoted oxidation and hydrolyzation reaction in the formation of the ring-opened product fluorescein. Prominent high sensitivity, selectivity and anti-interference performance were observed for each probe under physiological conditions, thus making the probes well suited for sensing of OCl− in living cells.

Coordination Behaviors and Supramolecular Interactions of 2-(2′-Pyridyl) Imidazoline: Crystal Structure of Its Two Cu(II) Complexes

Co-reporter:Xinmiao Wang;Chunyan Ren;Wentao Zhang

Journal of Inorganic and Organometallic Polymers and Materials 2014 Volume 24( Issue 3) pp:560-567

Publication Date(Web):2014 May

DOI:10.1007/s10904-013-0009-5

Two new copper coordination complexes, [Cu(PI)(OX)(H2O)]·H2O (1) and [Cu(PI)(fum)(H2O)]·H2O (2) [PI = 2-(2′-pyridyl) imidazoline, OX2− = dianion of oxalic acid and fum2− = dianion of fumaric acid], were synthesized by interface diffusion method based on Cu(II) ions, PI ligands and aliphatic dicarboxylic acids. Complex 1 is a mononuclear complex which spreads into a 3D (4,9)-connected supramolecular network via hydrogen bond interactions, while complex 2 features a 1D zigzag chain with two different orientations. These two compounds are characterized by single crystal X-ray diffraction, powder X-ray diffraction, elemental analyses, infrared spectra, and thermogravimetric analyses.

3D Ni(II)/Cu(II) Supermolecular Frameworks Based on Pyridylamine and Fumarate Co-ligands Containing a Trinodal (4,5,6)-Connected Network and a (H2O)16 Water Cluster

Co-reporter:Yifan Kang;Qing Liu;Wenting Yin;Wentao Zhang

Chinese Journal of Chemistry 2013 Volume 31( Issue 2) pp:256-262

Publication Date(Web):

DOI:10.1002/cjoc.201200851

Abstract

Two new complexes, [Ni(dpypda)(H₂O)₃]·(fum) (1) and [Cu₂(dpypda)₂(fum)₂]_n·8nH₂O (2) (dpypda=N²,N⁴-di(pyridin-2-yl)pyrimidine-2,4-diamine, fum=fumarate), have been synthesized and characterized by single-crystal X-ray diffraction. Complex 1 is a discrete unit, exhibiting a (4,5,6)-connected framework formed by hydrogen bonding interactions and electrostatic interactions between free fum dianions and mononuclear [Ni(dpypda)(H₂O)₃]²⁺ cations. However, in complex 2, two crystallographically independent fum dianions adopt the alternative mode of mixed monodentate bridging and chelating and bis(monodentate) bridging Cu(II) atoms to produce a one-dimensional (1D) in?nite zigzag chain. And there are unique (H₂O)₁₆ water clusters which consist of one cyclic (H₂O)₄ tetramer and two cyclic (H₂O)₅ pentamer with six dangling water molecules in its 3D supramolecular framework. Both 1 and 2 are characterized by IR and elemental analysis, and the TG properties were also investigated for 2.

A new (3,3,6)-connected achiral 3D supramolecular network containing unique helical chains based on 1H-benzimidazole-5,6-dicarboxylato and Pb(II)

Co-reporter:Yang Liu, Ping Liu, Qing Liu, Ling-Yan Pang, Chun-Yan Ren, Yao-Yu Wang

Inorganic Chemistry Communications 2013 Volume 35() pp:321-325

Publication Date(Web):September 2013

DOI:10.1016/j.inoche.2013.07.013

•A new 1D Pb(II) coordination polymer has been synthesized by a solvothermal method.•Complex 1 shows chirality induction and transfer between two kinds of helical chain.•The TG analysis and solid state fluorescence property of 1 were studied.A new 1D Pb(II) coordination polymer, {[Pb(Hbidc)(phen)]·H2O}n (1), has been synthesized by a solvothermal method based on 1H-benzimidazole-5,6-dicarboxylato (H3bidc) and 1,10-phenanthroline (phen). Complex 1 features two types of helical chains, a 1D left- and right-handed double-stranded helical chain and a supramolecular helical chain, which interweave into a new (3,3,6)-connected achiral 3D supramolecular network. Notably, the supramolecular helical chains are induced by the different spatial orientations of the 1D double-stranded helical chains. The structure and properties of 1 have been determined by single crystal X-ray diffraction, powder X-ray diffraction (PXRD), elemental analysis (EA), thermogravimetric (TG) analysis and solid state fluorescence spectra.A 1D Pb(II) coordination polymer, {[Pb(Hbidc)(phen)]•H2O}n, shows a unique chirality induction and transfer from 1D double-stranded helical chain to 1D supramolecular helical chain. The (3,3,6)-connected achiral 3D supramolecular network is constructed and stabilitied by hydrogen bonds and π–π stacking interactions. Solid state ﬂuorescence property of 1 has been determined.

An intriguing 4d–4f heterometallic coordination polymer with 1D pseudo-nanotube architectures

Co-reporter:Yi-Fan Kang, Ping Liu, Chao Yuan, Lin Cui, Yang Liu, Yao-Yu Wang

Inorganic Chemistry Communications 2013 Volume 36() pp:4-7

Publication Date(Web):October 2013

DOI:10.1016/j.inoche.2013.07.006

Temperature-controlled 1D helical and discrete Er(III) complexes based on benzimidazole-5,6-dicarboxylic acid

Co-reporter:Lu-Xi Zhang, Chang-Jun Fan, Ping Liu, Guo-Ping Yang, Chen Ren, Rui-Ting Liu

Inorganic Chemistry Communications 2010 Volume 13(Issue 8) pp:914-918

Publication Date(Web):August 2010

DOI:10.1016/j.inoche.2010.04.024

The reaction between ErCl3·6H2O and H2bmdc (H2bmdc = benzimidazole-5,6-dicarboxylic acid) produced two distinct complexes: 1D helical complex {[Er(Hbmdc)(bmdc)(H2O)3]·3H2O}n (1) obtained under hydrothermal condition at 160 °C and discrete complex [Er2(Hbmdc)2(bmdc)2(H2O)8]·8H2O (2) under ambient temperature, evaporated from the mother liquor of 1. The crystal structures of the complexes were determined by X-ray single-crystal diffraction. Through comparison of complexes 1 and 2, we found that enhanced temperature favors the formation of higher dimensional products and lower amount of coordinated water. Both complexes are characterized by IR, elemental analysis, X-ray powder diffraction and thermogravimetric analysis.Two new coordination compounds were constructed from ErCl3·6H2O and H2bmdc (H2bmdc = Benzimidazole-5,6-dicarboxylic acid). Through comparison of both compounds, it is found that enhanced temperature favors the formation of higher dimensional products and less coordinated water. Both complexes exhibit complicated 3D hydrogen bonding frameworks with multiple π-π stacking interactions.