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A new sandwiched polyoxometalate[HK11Cd4Cl2(PW9O34)2]·18H2O(1),incorporating a unique hybrid tetranuclear cadmium cluster(abbreviated to{Cd4})with two trivacant polyanions[B-α-PW9O34]9-,has been hydrothermally synthesized and structurally characterized by elemental analyses,IR spectroscopy,UV-vis,and single-crystal X-ray diffraction analysis.Crystal data for 1:monoclinic,space group C2/c,a=19.2997(4),b=13.8014(3),c=31.9819(8),β=102.764(2)o,V=8308.3(3)3,Z=4,P2O86Cl2K11Cd4W18H37,Mr=5735.13,Dc=4.584 mg·mm-3,F(000)=10084,μ=26.579 mm-1,the final R=0.0378 and wR=0.0989 for 6558 observed reflections(I>2σ(I)).X-ray crystallographic study shows that the molecular structure of 1 contains four cadmium atoms.Two CdO6distorted octahedra and two CdO5Cl distorted octahedra combine with each other in turn via edge-sharing,resulting in a regular rhomb-like cluster sandwiched between two{B-α-PW9O34}units.Further,the sandwich-type polyoxoanions were connected by K+ions to form a complicated 3-D open-framework through connecting with each terminal O atom of the[Cd4Cl2(PW9O34)2]12-polyoxoanions.In addition,compound 1 exhibits photoluminescence property at room temperature and the band gap can be assessed at 3.25 eV.
A new sandwiched polyoxometalate [HK11Cd4Cl2 (PW9O34) 2] .18H2O (1), incorporating a unique hybrid tetranuclear cadmium cluster (abbreviated to {Cd4}) with two trivacant polyanions [B-α-PW9O34] 9-, has been hydrothermally synthesized structurally characterized by elemental analyzes, IR spectroscopy, UV-vis and single-crystal X-ray diffraction analysis. Crystal data for 1: monoclinic, space group C2 / c, a = 19.2997 (4), b = 13.8014 (2) o = 8308.3 (3) 3 Z = 4 P2O86Cl2K11Cd4W18H37 Mr = 5735.13 Dc = 4.584 mg-mm-3 F000 = 10084 μ = 26.579 mm-1, the final R = 0.0378 and wR = 0.0989 for 6558 observed reflections (I> 2σ (I)). X-ray crystallographic study shows that the molecular structure of 1 contains four cadmium atoms. Two CdO 6 distorted octahedra and two CdO5Cl distorted octahedra combine with each other in turn via edge-sharing, resulting in a regular rhomb-like cluster sandwiched between two {B-α-PW9O34} units. Future, the sandwich-type polyoxoanions were connected by K + ions to form a complicated 3-D op en-framework through connecting with each terminal O atom of the [Cd4Cl2 (PW9O34) 2] 12-polyoxoanions. In addition, compound 1 exhibits photoluminescence property at room temperature and the band gap can be assessed at 3.25 eV.