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Abstract: A new inorganic–organic hybrid compound constructed from Keggin-type polyoxometalate and cadmium-organic units, namely, [Cd(Htrz)3]2[SiW12O40]·2H2O (1), [Htrz=1-H-1,2,4-triazole], has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR, TG, and UV–vis absorption spectra. In compound 1, each [SiW12O40]4− cluster is modified by six [Cd(Htrz)3]2+ metal–organic fragments, meanwhile, each [Cd(Htrz)3]2+ also connects with three [SiW12O40]4− to built up a binodal (3,6)-connected 2D planar network with the (43)2(46·66·83)-kgd topology. Interestingly, [SiW12O40]4− cluster exhibits a rare coordination mode acting as a hexadentate ligand, in which all of the six terminal oxygen atoms in the equatorial plane are synchronously participated in coordination. The diffuse reflectivity spectrum shows it can be regarded as a wide gap semiconductor. Moreover, the photocatalytic performance shows good photocatalytic activity for the degradation of Rhodamine B. [Copyright &y& Elsevier]

Abstract: A new one-dimensional Co(II) coordination polymer, Co(L)(N3)2 (L = pyridinio-N-acetate), has been synthesized by a diffusion method and characterized by single crystal X-ray diffraction. In the compound, Co(II) ions are linked by mixed triple bridges (two end-on azides and a syn–syn carboxylate), which transmit ferromagnetic coupling with J=13.96cm−1. The compound exhibits field-induced metamagnetic behaviors below TN =2.3K with Hc=100Oe, due to weak antiferromagnetic interactions between chains. [Copyright &y& Elsevier]