六次甲基四胺与H_nXW_(12)O_(40)·mH_2O(X=P,Si,Ge)电荷转移盐的合成、表征及非线性光学性质研究

Synthesis,Characterizations and Nonlinear Optical Properties of the Charge_Transfer Salts Based on Hexamethylenamine and H n XW 12 O 40 · m H 2O (X=P,Si,Ge)Acids

合成了由六次甲基四胺与Ｈ３ＰＷ１２Ｏ４０·ｎＨ２Ｏ，Ｈ４ＳｉＷ１２Ｏ４０·ｎＨ２Ｏ和Ｈ４ＧｅＷ１２Ｏ４０·ｎＨ２Ｏ 形成的具有非线性光学性质的电荷转移盐，并由元素分析，红外光谱，电子光谱进行了表征。结果表明固体中阴阳离子之间存在强的相互作用；非线性光学性质研究表明，三种电荷转移盐的倍频效应分别为ＫＨ２ＰＯ４（ＫＤＰ） 的０ ．１７ ，０ ．２５ 和０ ．０６ 倍；三阶非线性系数分别为６．２ ×１０－ １３ｅｓｕ，８ ．１ ×１０ － １３ｅｓｕ和４ ．３ ×１０ － １３ｅｓｕ。

The charge_transfer salts with nonlinear optical properties have been synthesized on the basis of hexamethyleanamine and the heteropoly acids,H 3PW 12 O 40 · n H 2O,H 4SiW 12 O 40 · n H 2O and H 4GeW 12 O 40 · n H 2O,and characterized by element analysis,IR spectnra and UV spectra.The results show that the there is a strong interaction between the cation and the anion.The results of the second_order nonlinear optical properties show that the SHG of the three kinds of charge_transfer salts are 0.17,0.25 and 0.06 times for KH 2PO 4 (KDP) respectively.The third order susceptibility of the compounds are 6.2×10 -13 esu,8.1×10 -13 esu and 4.3×10 -13 esu.