Synthesis, Crystal Structure and Photocatalytic Properties of a Supramolecular Assembly Based on Keggin Polyoxotungstate |
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Authors: | CHEN Shun-Yu CHEN Xin-Qin LIN Shen |
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Institution: | College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350108, China |
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Abstract: | A new supramolecular compound (4,4’-bipyH)4SiW12O40](4,4’-bipy) (4,4’-bipy = 4,4’-bipyridine) was synthesized hydrothermally and characterized by single-crystal X-ray diffraction and IR spectrum. The crystallography analysis for the title compound reveals that the crystal crystallizes in monoclinic, space group C2/m with a = 22.2767(12), b = 21.1879(11), c = 15.6942(8) , β = 97.068(3)°, V = 7351.3(7) 3, C50H44N10O40SiW12, Mr = 3659.24, Z = 4, Dc = 3.306 g/cm3, F(000) = 6544, GOOF = 1.137, R = 0.0577 and wR = 0.1579. The title compound consists of a discrete Keggin-type SiW12O40]4- anion, one 4,4’-bipy and four protonated (4,4’-bipyH)+ cations. The SiW12O40]4- anion and protonated 4,4’-bipy are connected to form a supramolecular structure by hydrogen bonds. Meanwhile, the title compound exhibits good photocatalytic activity for color degradation of Rhodamine-B dye solution under visible-light irradiation. |
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Keywords: | Keggin-type polyoxotungstate supramolecular architecture hydrothermalsynthesis Rhodamine-B dye photocatalysis degradation |
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