Reactions of polycarboxylic acid ligands (H(3)cpa = 3-(4-carboxy-2-methoxyphenoxy) phthalic acid, H(3)cmp = 4-(4-carboxy-2-methoxyphenoxy) phthalic acid), N-containing ligand (bimp = 1,4-di(1H-imidazol-1-yl) benzene), with cobalt and cadmium salts under diverse reaction conditions have afforded two novel metal-organic frameworks: [Co-3(cpa)(2)(bimp)(2)](n) (1), [Cd-2(cmp)(bimp)(2)](n) (2). The V-shape organic polycarboxylic acid ligands play vital roles in determining the final structure and properties of the complexes. Complex 1 has a 3D structure constructed via bimp ligand connecting adjacent 2D layers and complex 2 has a 3D network with right-handed screw. Magnetic susceptibility measurements (chi(M)) for complex 1 has been performed, and revealed predominant antiferromagnetic behavior. Complex 2 has been employed as a type of fluorescent probe to monitor different metal ions, and showed the obviously selective response to Fe3+ ion through luminescence quenching. (C) 2018 Published by Elsevier Ltd.

Five novel coordination polymers (CPs) [Co(pmb)(bibp)](n) (1, 2), [Co-3(cpa)(2)(bibp)(3)center dot H2O](n) (3, [Ni-3(cpa)(2)(bibp)(3)center dot 4H(2)O](n) (4) and [Cd-3(cpa)(2)(bibp)(3)](n) (5), have been prepared by employing two asymmetric semi-rigid carboxylate organic ligands (H(2)pmb = 4-(4-carboxyphenoxy)-3-methoxybenzoic acid, H(3)cpa = 3-(4-carboxy-2-methoxyphenoxy) phthalic acid) and one N-containing ligand (bibp = 4,4'-di(1H-imidazol-1-yl)-1,1'-biphenyl) under hydrothermal conditions. Interestingly, single crystal X-ray analysis reveals that compounds 1 and 2 feature differently structural frameworks despite using the same ligands and metal ion Co(II) but different solvents. Compound 1 has an 8-fold interpenetrated 3D net topology, while compound 2 has a 2D net topology. This study shows a controllable regulation of framework by changing solvent type in isomers CPs. Compounds 3, 4 and 5 are isomorphic, which exhibit uniform 3, 4-connected 3D net topology. The dye adsorption studies of 1 and 2 revealed that rapid uptake for methyl orange (MO) can be attributed to the porous character and charge properties of CPs. In addition, magnetic susceptibility measurements of compounds 1, 2 and 3 reveal predominant antiferromagnetic exchange interactions between central Co(II) ions.

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Three new Coordination Polymers (CPs), namely [Co-2(dpb)(dipe)(H2O)(2)](n) (1), [Zn-2(dpb)(dipe)(H2O)(2)](n) (2) and {[Co-2(dpb)(bib)(2)(H2O)]center dot H2O}(n) (3), where H(4)dpb = 1-(3,5-dicarboxy-benzy1)-1H-pyrazole-3,5-dicarboxylic acid, dipe = (E)-1,2-di(pyridin-4-yl)ethene, bib = 1,4-di(1H-imidazol-1-yl)benzene, have been synthesized hydrothermally and characterized. Single-crystal XRD data analysis reveals that 1 and 2 are isomorphic, and possessing a (3,4,5)-connected net with a Schlafli symbol of (4.6(2))(4.6(5))(4(2).6(5).8(3)), Complex 3 presents a (4,4,4)-connected 3-nodal 3D net with {4-6(2).8(3)}{4.6(3).8(2)}{6(4).8(2)}. Also, we systematically examined the fluorescence sensing responses of 2 to small solvent molecules and metal ions. Notably, complex 2 can act as a potential promising fluorescence sensor for sensing acetone and Fe3+ ion with high selectivity and sensitivity. Meanwhile, we have investigated the magnetic behaviors of complexes 1 and 3 with dinuclear Co(II) centers, revealing antiferromagnetic behavior in 1 and 3. (C) 2017 Elsevier Ltd. All rights reserved.

A new Co(II)(15) cluster, [Co-15(L)(9)(OH)(12)(EtOH)(8)(H2O)(4)] (1) (H2L= [1,1'-biphenyl]-2,2'-dicarboxylic acid), has been synthesized from the reaction of H2L and Co(NO3)(2).6H(2)O under solvothermal condition and characterized by X-ray single crystal diffraction, IR spectra, thermogravimetric analysis, Powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS), and elemental analysis. The results show that the coordination chemistry of the multi-dentate ligand H2L on Co(II) ion with the exist of mu(3)-bridging mode of hydroxyl groups and the mu(2)-carboxyl oxygen atom in the complex 1. The magnetic investigations of complex 1 has shown antiferromagnetic interactions between the cobalt centers, which indicate that complex 1 may be a good candidate for magnetic material.

Two metal-organic frameworks (MOFs), [Ag-2(H2L)(4,4'-bipy)(mu(3)-OH)](n) (1) and [Zn-3(L)(2)(bpe)(2)(HO2)2](n) (2) were synthesized under hydrothermal conditions using the tricarboxylate and N-containing ligands (H3L = 3-(3-carboxyphenoxy) phthalic acid, 4,4'-bipy = 4,4'-bipyridine, bpe = 1,2-di(pyridine-4-yl) ethene), and structurally characterized by single-crystal X-ray diffraction analysis, FT-IR spectroscopy, powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA), furthermore, fluorescent spectra and absorption properties are discussed. Structural analysis reveals that Complex 1 is built from H3L, 4,4'-bipy and trinucleated Ag to form a three-dimensional (3D) network with a (4,4)-connected topology and a symbol of (6(3).8(3))(4)(8(6)). As for 2, a trinucleate secondary building units (SBU), linked by the H3L ligand generated a one-dimensional (1D) chain, then the two adjacent 1D chains are joined together by bpe ligand, yielding a 1D trapezoidal chain. Our successive application studies indicate that complex 1 shows rapid uptake for methyl orange (MO) and iodine (I-2), compound 2 is an impressive Zn-MOF based sensor for detecting Fe-3+ ions in aqueous solution. (C) 2016 Elsevier B.V. All rights reserved.

A novel series of Zn/Cd coordination polymers based on H3L, namely, [Zn2(HL)2(bipy)2(H2O)6]n (1), [Zn(HL)(phen)]n (2), [Cd3L2(bbi)3]n (3), [Zn3L2(bbi)3]n (4) [(H3L =4-[(1-carboxynaphthalen-2-yl)oxy]phthalic acid, bipy =4,4′-bipyridine, phen =1,10-phenanthroline, bbi =1,1′-(1,4-butanediyl)bis(imidazole] have been successfully synthesized by solvothermal reaction. Compound 1 possesses two diverse 1D chains constructed by different bipy coligands, which were further connected to form a 3D supramolecular architecture by hydrogen bonding interactions. Compound 2 possesses a complicated 1D chain based on secondary building unit (SBU) with binuclear Zn cluster. Compounds 3 and 4 exhibit similar 2D→3D framework, which can be rationalized as (3,4,4)-connected 3D net with a Schläfli symbol of (63.8.102)2(63)2(64.8.10). In particular, compound 3 exhibited a high sensitivity for Cr3+ in aqueous solutions, which suggest that compound 3 is a promising luminescent probe for selectively sensing Cr3+.

Three coordination polymers based on the new ligand oxamide N,N-bis(4-phthalic acid), namely [Zn(L)0.5-(2,2′-bpy)] n (1), [Ni2(2,2′-bpy)4(µ 2-Ox)]L·3H2O (2) and [Cd(L)(1,10-phen)] (3) [L = oxamide N,N-bis(4-phthalic acid)], (2,2′-bpy = 2,2′-bipyridine), (1,10-phen = 1,10-phenanthroline), have been solvothermally synthesized and structurally characterized by single-crystal X-ray diffraction: compound 1 is one-dimensional ladder-like coordination polymer, compound 2 exhibits a three-dimensional structure resulting in extensive hydrogen bonds built with the help of lattice water molecules, compound 3 also exhibits a three-dimensional supramolecular structure. All compounds were also characterized by elemental analysis, IR spectra and thermogravimetric analysis; furthermore, the magnetic measurements for 2 reveal antiferromagnetic coupling between the nickel(II) ions.