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Issue 44, 2017
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Magnetic properties and luminescence sensing of five coordination polymers based on a rigid terphenyl-tetracarboxylic acid

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Abstract

Herein, 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) were successfully 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 involved a new 4,6-c 3D network structure. Complex 3 displayed an open 3D structure with the bbf topological type. Complex 4 involved an extended 3D (4,6)-c network with the point symbol of {44·610·8}{44·62}. Complex 5 had 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, and the results indicated that the isophthalic acid bridge exhibited weak ferromagnetic coupling. Moreover, the fluorescence experiments showed that complex 3 had a potential application in the sensing of small organic molecules.

Graphical abstract: Magnetic properties and luminescence sensing of five coordination polymers based on a rigid terphenyl-tetracarboxylic acid

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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, 2017,19, 6651-6659
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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, L. Fan, X. Niu, X. Wang and T. Hu, CrystEngComm, 2017, 19, 6651
    DOI: 10.1039/C7CE01510K

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