Structures and photoluminescence of coordination polymers assembled from bifunctional ligand containing both tetrazole and imidazole groups |
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Affiliation: | 1. School of Chemistry and Environment, South China Normal University, Guangzhou 510006, PR China;2. Guangzhou Key Laboratory of Materials for Energy Conversion and Storage, South China Normal University, Guangzhou 510006, PR China |
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Abstract: | Three new coordination polymers, namely, {Cu2(IPT)(SO4)(OH)(H2O)]·H2O}n (HIPT = 5-(4-(1H-imidazol-1-yl)phenyl)- 1H-tetrazolate, 1), {Cd2(IPT)(NPA)(OH)]·H2O}n (H2NPA = 5-nitroisophthalic acid, 2), and {Zn2(IPT)(IDC)(H2O)]·3H2O}n (H3IDC = 1H-imidazole-4,5-dicarboxylic acid, 3), were assembled from a bifunctional organic ligand containing both tetrazole and imidazole groups with/without the aid of carboxylate coligands. Compound 1 possesses 2D structure built by 1D Cu2(IPT)(SO4)(OH)]n secondary building blocks and IPT? linkers. The 2D networks are linked into 3D supramolecular framework via water chains in helical conformation. Compound 2 displays 3D pillar-layer framework with 2D layers based on tetranuclear Cd(II) SBUs and NPA2 ? pillars. Compound 3 exhibits a 3D framework constructed from the interconnection of 1D Zn-IDC]n chains and binuclear Zn2(IPT)2 rings. The thermal stabilities of porous compound 3 and luminescent properties of compounds 2 and 3 have also been studied in detail. They exhibit intense solid-state fluorescent emissions at room temperature. |
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