CsB3GeO7 and K2B2Ge3O10: explorations of new second-order nonlinear optical materials in the borogermanate systems.
CsB3GeO7 and K2B2Ge3O10: explorations of new second-order nonlinear optical materials in the borogermanate systems.
复制标题
DOI：
10.1021/ic801292p
复制
发表时间：
2008-10
影响因子：
4.6
通讯作者：
F. Kong;Hai‐Long Jiang;Ting Hu;J. Mao
中科院分区：
文献类型：
--
作者：
F. Kong;Hai‐Long Jiang;Ting Hu;J. Mao
采用高温固相反应法在铂坩埚中合成了两种新型的非中心对称碱金属硼锗酸盐CsB 3GeO 7和K2 B2 Ge 3 O 10。CsB 3GeO 7的结构是由环状的B 3 O 7（5-）基团通过Ge（IV）阳离子相互连接而形成的一种新的三维结构，而K2 B 2Ge 3 O 10的结构是由帽状的[Ge 3 B 2 O 14]（10-）团簇通过Ge-O-B桥相互连接而形成的一种新的三维网络结构. CsB 3GeO 7的二次谐波响应约为KDP（KH 2 PO 4）的1.5倍，而K2 B2 Ge 3 O 10的二次谐波信号很弱。这两种化合物都是绝缘体，在300-5000 nm范围内是透明的。对这两种化合物的电子结构进行了计算。
Two novel alkali(I) borogermanates with noncentrosymmetric structures, namely, CsB 3GeO 7 and K 2B 2Ge 3O 10, have been synthesized by high-temperature solid-state reactions in a platinum crucible. The structure of CsB 3GeO 7 features a novel three-dimensional (3D) framework composed of cyclic B 3O 7 (5-) groups that are interconnected by Ge(IV) cations, whereas the structure of K 2B 2Ge 3O 10 is a new 3D network based on cap-shaped [Ge 3B 2O 14] (10-) clusters that are interconnected via Ge-O-B bridges. CsB 3GeO 7 exhibits a second-harmonic generation (SHG) response that is about 1.5 times that of KDP (KH 2PO 4), whereas the SHG signal of K 2B 2Ge 3O 10 is very weak. Both compounds are insulators and transparent in the range of 300-5000 nm. The electronic structure calculations for both compounds also have been performed.