inorginc-b-Ge-同构同13.pdf

Inorg. Chem. 2008, 47, 10611-10617 CsB GeO and K B Ge O : Explorations of New Second-Order 3 7 2 2 3 10 Nonlinear Optical Materials in the Borogermanate Systems Fang Kong, Hai-Long Jiang, Ting Hu, and Jiang-Gao Mao* State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China Received July 9, 2008 Two novel alkali(I) borogermanates with noncentrosymmetric structures, namely, CsB GeO and K B Ge O , have 3 7 2 2 3 10 been synthesized by high-temperature solid-state reactions in a platinum crucible. The structure of CsB GeO 3 7 features a novel three-dimensional (3D) framework composed of cyclic B O 5- groups that are interconnected by 3 7 Ge(IV) cations, whereas the structure of K B Ge O is a new 3D network based on cap-shaped [Ge B O ]10- 2 2 3 10 3 2 14 clusters that are interconnected via Ge-O-B bridges. CsB GeO exhibits a second-harmonic generation (SHG) 3 7 response that is about 1.5 times that of KDP (KH PO ), wher