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Magnetic Properties and Luminescence Sensing of Five Coordination Polymers Based on a Rigid Terphenyl-tetracarboxylic Acid

Abstract

Five coordination polymers, namely {[Ni2(tptc)(4,4’-bibp)2]•2H2O•2cyclohexanol}n (1), {[Co2(tptc)(4,4’-bibp)2]•2H2O•2cyclohexanol}n (2), {[Zn2(tptc)(1,2-bimb)2]}n (3), {[Co(tptc)0.5(1,4-bib)]•H2O•DMF}n (4), and {[Co2(tptc)(1,2-bimb)(H2O)]•H2O}n (5) (H4tptc = terphenyl-3,3”,5,5”-tetracarboxylic, 4,4’-bibp = 4,4’-bis(imidazolyl)biphenyl, 1,4-bib = 1,4-bis(imidazol-1-yl)benzene, and 1,2-bimb = 1,2-bis(imidazol-1-ylmethyl)benzene) have successfully been constructed based on a rigid terphenyl-tetracarboxylic acid ligand and N-containing auxiliary ligands under solvothermal conditions. Their structures were determined by single crystal X-ray diffraction and further characterized by elemental analyses, IR spectroscopy, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analyses. Complexes 1 and 2 are a new 4,6-c 3D network structure. Complex 3 displays an open 3D structure with the bbf topological type. 4 is an extended 3D (4,6)-c network with the point symbol of {44.610.8}{44.62}. Complex 5 is a 2D framework with the dinuclear [Co2(COO)2] SBUs. The variable-temperature magnetic susceptibilities of complexes 1, 2, 4 and 5 were also investigated, the results indicate that the isophthalic acid bridge exhibits weak ferromagnetic coupling. Moreover, the fluorescent experiments show that complex 3 has a potential application in sensing of small organic molecules.

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Publication details

The article was received on 19 Aug 2017, accepted on 13 Oct 2017 and first published on 13 Oct 2017


Article type: Paper
DOI: 10.1039/C7CE01510K
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Magnetic Properties and Luminescence Sensing of Five Coordination Polymers Based on a Rigid Terphenyl-tetracarboxylic Acid

    L. Gao, Q. Zhao, M. Li, F. Liming, X. Niu, X. wang and T. Hu, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE01510K

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