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由 N-甲基吡咯烷酮 (NMP)和 Hn XMo1 2 O40 · m H2 O(X=P,Si,Ge)合成了具有非线性光学性质的电荷转移盐 ,(NMPH ) 3PMo1 2 O40 · CH3CN ( ) ,(NMPH) 4Si Mo1 2 O40 · CH3CN ( )和(NMPH) 4Ge Mo1 2 O40 · CH3CN( ) ,并以元素分析 ,红外光谱 ,漫反射电子光谱进行了表征 .结果表明 ,杂多酸形成电荷转移盐后其阴离子结构未变 ;N-甲基吡咯烷酮通过 N原子与酸中的质子H+ 结合成阳离子而成盐 ,在高压汞灯照射下阴阳离子之间可以发生电荷转变 .非线性光学性质研究表明 ,电荷转移盐的倍频效应强度分别为 I2ω =0 .3IKDP,I2ω =0和 I2ω =0 .0 2 IKDP,三阶非线性系数分别为χ( 3) =5 .0× 10 - 1 4 esu,χ( 3) =3.1× 10 - 1 3esu和χ( 3) =4.3× 10 - 1 3es
(NMPH) 3PMo1 2 O40 · CH3CN () with nonlinear optical properties was synthesized from N-methylpyrrolidone (NMP) and Hn XMo1 2 O40 · m H2 O (X = P, Si, Ge) (NMPH) 4Si Mo1 2 O40 · CH3CN () and (NMPH) 4Ge Mo1 2 O40 · CH3CN () were synthesized and characterized by elemental analysis, IR and diffuse reflectance electron spectroscopy.The results showed that heteropolyacids formed charge-transfer salts N-methylpyrrolidone is salt formed by the combination of N atom and proton H + in the acid, and the charge-transfer can occur between the cation and cation under the irradiation of high-pressure mercury lamp.According to the nonlinear optical properties, The third-order nonlinear coefficients of charge-transfer salt are χ (3) = 5.0 × 10 - 1 4 esu, respectively, χ (3) = 3.1 × 10 - 1 3esu and χ (3) = 4.3 × 10 - 1 3es