Hydrothermal Synthesis and Crystal Structure of Two New α-Keggin Derivatives Decorated by Transition Metal Complexes |
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| Authors: | Limei Dai Ying Ma Enbo Wang Ying Lu Xinxin Xu Xiuli Bai |
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| Institution: | (1) Institute of Polyoxometalate Chemistry, Department of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China;(2) Department of Chemistry, Heihe College, Heilongjiang, 164300, P. R. China |
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| Abstract: | Two new neutral Keggin-polyoxometalate derivatives: {Co(2,2′-bipy)2(H2O)}2]–PMoVI7MoV5O40(VIVO)2] (1) and {Ni(phen)2(H2O)}2](H3O) PMoVI10MoV2O40] · 4H2O (2) have been synthesized under hydrothermal conditions and characterized by i.r., t.g. analysis, x.p.s. spectra and single-crystal
X-ray diffraction. In the case of (1), the polyoxoanion cluster PMo12O40]8− is capped by two vanadium atoms via four bridging oxo groups on two opposite {Mo4O4} pits of the Keggin polyoxoanion. Two {Co (2,2′-bipy)2(H2O)} fragments are supported on the two vanadium atoms through two terminal oxygen atoms from two vanadium atoms. In (2), two {Ni(phen)2(H2O)}2+ moieties are linked to the molybdophosphate cluster PMo12O40] core to form a neutral bimetallic cluster. Furthermore, through the linkages of π – π stacking interactions and hydrogen bond contacts, extended three-dimensional supramolecular networks in the solid of (1) and (2) were formed. |
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