钨硅酸电荷转移盐的光敏性及非线性光学性质

The Photosensitivity and Nonlinear Optical Properties of a ChargeTransfer Salt Based on Tungstosilicic Acid

由于在光能转换和激光等高科技领域的广泛应用，光敏材料和非线性光学材料成为当今十分活跃的研究领域［１］．研究表明，非线性光学性质的产生源于分子内电荷的转移，而发生分子内电荷转移的必要条件是分子内必须具备电子给体与受体［２］，有文献报道，电子给－受型配合...

A chargetransfer salt exhibiting photosensitivity and nonlinear optical property has been synthesized from tungstosilicic acid and Nmethylpyrolidone and characterized by elemental analysis and IR spectrometry. The photosensitivity of the compound has been studied by diffuse reflectance electronic spectrometry and ESR measurement. The nonlinear optical property of the compound is determined by powder method. The results show that electron can be transfered between organic species and the anion under light irradiation. The compound exhibits the second and third order nonlinear optical properties. The thirdharmonic generation intensity and the thirdorder susceptibility of the compound measured by secondharmonic generation technique relative to a KDP crystal were estimated to be I=085IKDP and (3)=3610-12esu, respectively.