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Issue 37, 2015
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Three new POM-based compounds constructed by rigid thiabendazole and flexible bis(pyrazole) ligands: structures and properties for Hg2+ recognition

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Abstract

By using mixed rigid and flexible organic ligands, three Keggin based compounds, [Ag6(tbz)4(bmz)2(H3PW12O40)]·4H2O (1), [Ag(H2bdpm)2(H2PMo12O40)]·7.5H2O (2), and [Ag4(tbz)2(H2bdpm)2(HPMo12O40)]·2H2O (3) (Htbz = thiabendazole, Hbmz = benzimidazole, H2bdpm = 1,1′-bis(3,5-dimethyl-1H-pyrazolate)methane), were hydrothermally synthesized and structurally characterized. Through adopting rigid Htbz ligands, compound 1 with hexa-nuclear AgI clusters has been obtained. These hexa-nuclear clusters are linked by Keggin anions alternately to form a one dimensional (1D) chain. In compound 2, the organic moiety is the flexible H2bdpm ligand. The Keggin anions are fused by [Ag(H2bdpm)2]+ subunits to form a 1D chain. In compound 3, the rigid Htbz and the flexible H2bdpm cooperate to modify the anions. Two tbz and two H2bdpm are fused by four AgI ions to construct a tetra-nuclear AgI cycle. The anions connect these cycles through Ag–O bonds alternately to form a 1D chain. Adjacent chains arrange parallel to build a 2D layer. The chains in the adjacent layers are vertically packed and linked by Ag–O bonds to construct a 3D framework. The electrochemical and photocatalytic properties of the title compounds have been studied. Furthermore, we have also studied the Hg2+ recognition properties in a suspension of compounds 1 and 3.

Graphical abstract: Three new POM-based compounds constructed by rigid thiabendazole and flexible bis(pyrazole) ligands: structures and properties for Hg2+ recognition

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Publication details

The article was received on 26 Jun 2015, accepted on 12 Aug 2015 and first published on 17 Aug 2015


Article type: Paper
DOI: 10.1039/C5DT02420J
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Citation: Dalton Trans., 2015,44, 16486-16493

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    Three new POM-based compounds constructed by rigid thiabendazole and flexible bis(pyrazole) ligands: structures and properties for Hg2+ recognition

    A. Tian, Y. Ning, Y. Yang, X. Hou, J. Ying, G. Liu, J. Zhang and X. Wang, Dalton Trans., 2015, 44, 16486
    DOI: 10.1039/C5DT02420J

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