Two Keggin Templated Supramolecular Compounds by Exerting the Chelate and Linking Dual Roles of the Ligand 2, 2′‐Biimidazole |
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Authors: | Jun Ying Xiao‐Ling Lin Yu‐Jing Liu Ru Xiao Xiu‐Li Wang Dr. Ai‐Xiang Tian |
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Affiliation: | Department of Chemistry, Bohai University, Jinzhou, 121000, P. R. China |
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Abstract: | Two new Keggin templated supramolecular compounds, [Zn2(H2biim)5(SiM12O40)] · 4H2O [M = W ( 1 ), Mo ( 2 )] (H2biim = 2, 2′‐biimidazole), were synthesized under hydrothermal conditions by using the ligand 2, 2′‐biimidazole. They were characterized by single‐crystal X‐ray diffraction, elemental analyses, IR and photoluminescence spectroscopy as well as cyclic voltammetry. The two isostructural compounds are constructed by two discrete supramolecular moieties: the inorganic chains consist of Keggin anions and metal‐organic chains constructed by [Zn2(H2biim)5]4+ subunits. In the dinuclear [Zn2(H2biim)5]4+ subunit, the H2biim ligands exhibit a dual role, chelating and linking. The metal‐organic chains further construct a 3D supramolecular framework with channels, in which the Keggin‐based inorganic chains are accommodated. The electrochemical behaviors of compounds 1 and 2 bulk‐modified carbon paste electrodes ( 1 ‐CPE, 2 ‐CPE) were studied. |
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Keywords: | Keggin polyoxometalate 2, 2′ ‐Biimidazole Template structures Zinc Supramolecular compounds |
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