A Series of New Organic−Inorganic Molybdenum Arsenate Complexes Based on [(ZnO<sub>6</sub>)(As<sub>3</sub>O<sub>3</sub>)<sub>2</sub>Mo<sub>6</sub>O<sub>18</sub>]<sup>4-</sup> and [H<i><sub>x</sub></i>As<sub>2</sub>Mo<sub>6</sub>O<sub>26</sub>]<sup>(6-</sup><i><sup>x</sup></i><sup>)-</sup> Clusters as SBUs
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By synthesizing the novel molybdenum arsenate complexes, we have obtained eight new structures, namely, (4,4‘-bipy)[Zn(4,4‘-bipy)2(H2O)2]2[(ZnO6)(AsIII3O3)2Mo6O18]·7H2O, 1, [Zn(phen)2(H2O)]2[(ZnO6)(AsIII3O3)2Mo6O18]·4H2O, 2, [Zn(2,2‘-bipy)2(H2O)]2[(ZnO6)(AsIII3O3)2Mo6O18]·4H2O, 3, [Zn(H4,4‘-bipy)2(H2O)4][(ZnO6)(AsIII3O3)2Mo6O18]·8H2O, 4, (H24,4‘-bipy)[CuI(4,4‘-bipy)]2[H2AsV2Mo6O26]·H2O, 5, (H24,4‘-bipy)3[AsV2Mo6O26]·4H2O, 6, (H24,4‘-bipy)3[AsV2Mo6O26(H2O)]·4H2O, 7, and (H24,4‘-bipy)2.5(H3O)[AsV2Mo6O26(H2O)]·1.25H2O, 8 (4,4‘-bipy = 4,4‘-bipyridine, 2,2‘-bipy = 2,2‘-bipyridine, phen = 1,10-phenanthroline). These structures were determined by single-crystal X-ray diffraction analysis and were further characterized by elemental analysis, IR, XPS spectroscopy, and TG analysis. The structure of 1 is constructed from two-dimensional square gridlike sheets linked by the polyanions [(ZnO6)(AsIII3O3)2Mo6O18]4- via hydrogen-bonding interactions to form a three-dimensional supramolecular framework with two types of channels. Compounds 2 and 3 display similar bisupported structures. Compound 4 features a three-dimensional supramolecular architecture. Compound 5 possesses a 1D infinite ladderlike ribbon. Compounds 6−8 are discrete structures exhibiting three isomeric forms of [HxAs2Mo6O26](6-x)-. Furthermore, compound 8 represents a new isomer B‘-[As2Mo6O26(H2O)]6-. In addition, the fluorescent properties of compounds 1−3 are reported.
