Hydrothermal Synthesis,Structure and Properties of a 3D Pillar-layered Metal-organic Framework Based on Amino-arenedisulfonate Ligand

One novel metal-organic framework(MOF), [Ba(L)(HO)](1, HL =aniline-2,5-disulfonic acid), has been synthesized by hydrothermal method. Each barium atom is eleven-coordinated into a distorted monocapped pentagonal antiprismatic arrangement. Compound 1 shows an interesting 3 D pillar-layered structure constructed from 2 D inorganic layers[Ba(SO)(HO)]and organic pillars of phenyl moieties of L2-linkages. The inorganic layers are supported by the organic pillars, generating a novel 3 D open framework structure with {3, 4~6, 5~5, 6~5,7~4}2{3}{5} topology. The result of fluorescence measurement can reveal that the decayed emission band centered at 492 nm may be caused by the interactions of the ligands and the metal ions.Compound 1 exhibits selective toward the adsorption of COover Nat 273 K.

A Novel 3D Pillar-layered Co(Ⅱ)-MOF with(4,8)-Connected Topology:Synthesis,Structure and Magnetic Properties

By using ＂pillaring＂ strategy, a new Co（Ⅱ）-MOF, [Co_2（abtc）（bimb）_2]·2H_2O（1, H_4abtc = 3,3？,5,5？-azobenzenetetracarboxylic acid, bimb = 4,4？-bis（imidazole-1-ylmethyl）biphenyl）, has been solvothermally synthesized and structurally characterized. The structural determination revealed that 1 features a 3D pillar-layered framework with（4,8）-connected {4^4.6^2}{4^8.6^（20）} topology based on dinuclear Co（Ⅱ）-SBUs. The magnetic investigation shows that the dominant antiferromagnetic coupling is observed in compound 1.

Synthesis and Crystal Structure of a Novel Compound:[Nd_3(OH)_7(O_2CC_6H_4SO_3)(H_2O)]_n·nH_2O with a Pillar-layered Structure

A novel Nd（Ⅲ） compound,[Nd3（OH）7（O2CC6H4SO3）（H2O）]n·nH2O 1,has been synthesized by the hydrothermal reaction of Nd2O3 and 3-sulfobenzoic acid monosodium salt. It was characterized by IR spectroscopy,elemental analysis,thermogravimetric analysis and single-crystal X-ray diffraction. It crystallizes in monoclinic,space group P21/c with a = 13.024（3）,b = 10.961（2）,c = 12.792（3） ,β = 91.271（3）°,V = 1825.6（7） 3,Z = 4,Mr = 787.97,Dc = 2.867 g/cm3,μ = 8.584 mm-1,F（000） = 1460,S = 1.035,R = 0.0442 and wR = 0.1166 （I 〉 2σ（I））. In this compound,the cross-linkage of Nd atoms by bridging hydroxy groups results in a Nd-O inorganic 〈200〉 layer,and such layers are linked by the 3-O3S-C6H4-CO2 dianions into a pillar-layered structure. The lattice water molecules are located in the cavity.

Impact of the flexibility of pillar linkers on the structure and CO_2 adsorption property of ‘‘pillar-layered'' MOFs

A new metal–organic framework {[Zn2（bpta）（bpy-ee）（H2O）2]·x solve}n（1）（H4bpta = biphenyl-2,20,6,60-tetracarboxylic acid and bpy-ee = 1,2-bis（4-pyridyl）ethylene） has been obtained under hydrothermal condition, and structurally characterized by single-crystal X-ray diffraction. Complex 1 reveals a threedimensional（3D） “pillar-layered” framework with non-flexible linker, in which some different structure characters can be found compared to that of some related other “pillar-layered” MOFs based on flexible pillar linkers. It demonstrates the impact of the flexibility of pillar linker on the final structure in this system. In addition, the selective CO2 adsorption performance of 1 was also investigated.

Synthesis,Structure and Topological Analysis of a New Zinc(Ⅱ) Complex [Zn_2(bptc)(bpe)(H_2O)]_n

A novel zinc coordination polymer, [Zn2（bptc）（bpe）（H2O）]n （1, Habptc = 3,3＂,4,4＂- benzophenonetetracarboxylate, bpe = 1,2-bis（4-pyridyl） ethane）, has been prepared under hydrothermal conditions. The crystal structure is of monoclinic, space group C/2c with a = 27.50（2）, b = 6.207（4）, c = 16.233（11） A, β = 107.522（14）°, V= 2642 （3） As, C29H22N2O11Zn2, Mr = 705.27, Z = 4, Dc = 1.773 g/cm3, F（000） = 1432, p = 1.887 mm-1, R = 0.0421 and wR = 0.1049 for 2594 observed reflections （I 〉 20（/））. X-ray single-crystal diffraction analysis shows that 1 features two-dimensional [Zn2（bptc）（H2O）] layers, which are further linked by the bpe ligands to give rise to a three-dimensional pillar-layered structure. According to the topology analysis, this framework can be simplified into a （4,6）-connected （4^4.6＆2）（4^4.6^10.8） network.

Synthesis, Structure and Luminescent Property of a New bnn-type Zn(Ⅱ) Coordination Polymer

A new Zn（II） coordination polymer, namely [Zn（Htci）（bib）0.5（H20）]n＇nH20 （1, H3tci = tri（2-carboxyethyl）isocyanurate, bib = 1,4-bis（imidazol-l-ylmethyl）-butane） has been synthesized by combining H3tci and bib ligands with Zn（II） salts under solvothermal conditions. The title compound crystallizes in monoclinic, space group P2 1/c with a = 13.3424（7）, b =7.9051 （5）, c = 20.4650（12） A, fl = 101.935（5）°, V = 2111.8（2） A3, CI7H24N5OI 1Zn, Mr = 539.8, Z = 4, Dc = 1.698 g/cm3, F（000）= 1116,/z = 1.236 mm-1, the final R = 0.0398 and wR = 0.00879 for 3722 observed reflections （I 〉 2σ（/））. X-ray structural analysis reveals that compound 1 exhibits a three-dimensional （3D） pillar-layered framework, and can be simplified into a 5-connected bnn topological network. Moreover, the luminescent properties for compound 1 were also studied at room temperature.

Fluorinated pillared-layer metal-organic framework microrods for improved electrochemical cycling stability

Developing metal-organic framework(MOF)-based materials with good cyclic stability is the key to their practical application. Fluorinated organic compounds are usually highly chemically stability due to the high electronegativity of fluorine. Also, the pillared-layer structures based on coordination bonds have better structure and thermal stability than those based on hydrogen bonds. Herein, the fluorinated pillared-layer [Ni(2,3,4,5-tetrafluorobenzoic acid)(4,4-bipyridine)]nMOF([Ni(TFBA)(Bpy)]n) materials were constructed through a facile room-temperature solution reaction and used as electrode materials for supercapacitors. Surprisingly, the size/morphology of Ni(TFBA)(Bpy)nMOFs could be adjusted by varying the synthesis time. Benefting from the short ion diffusion length, unique pillar-layer structure, and strong intercomponent synergy of organic ligands, the Ni(TFBA)(Bpy)nMOF microrods showed a higher electrochemical energy storage capability than bulk MOFs. At the same time, compared to the non-fluorinated [Ni(benzoic acid)(Bpy)]nMOFs(31.5% capacitance decay), the fluorinated Ni(TFBA)(Bpy)n MOFs have a higher cycle stability with only 2.6% capacitance loss after 5000 cycles at 3 m A/cm^(2).