“推-拉”型偶氮苯分子的光谱性质和二阶非线性光学性质  

The Spectroscopy Characteristics and the Second-order Nonlinear Optical Properties of Novel Azobenzene Molecules with Push-pull Structures

作　　者：颜星中[1] 徐志凌[1] 罗挺 杨佩青[1] 蔡志岗[1] 

机构地区：[1]超快速激光光谱学国家重点实验室,中山大学广州510275

出　　处：《高等学校化学学报》1997年第4期554-558,共5页Chemical Journal of Chinese Universities

基　　金：广东省自然科学基金

摘　　要：研究了具有“推-拉”电子结构的4＇-（N，N-二羟乙基）氨基4-硝基偶氮苯（R—HANB）衍生物的光谱性质和二阶非线性光学性质．R－HANB是一类假芪型偶氮苯分子，其激发态具有相似的能级结构，且在不同状态下均具有较高的二阶非线性光学活性．其粉末二次谐波信号多数强于分散红1，一阶超极化率与基态偶极短动量的复合量用溶剂变色法测得为＞3．4×10(82)C2m4／V2，其5％掺杂聚甲基丙烯酸甲酯薄膜以电晕极化测得电光系数在72×10(19)m4／V以上．In this paper, the spectroscopy characteristics and the second-order nonlinear op-tical properties of a series of push-pull chromorphores (R-HANB) based on 4'-bis (N, N-hydroxyethylene)imino-4-nitro azobenzene were studied. R-HANB were classified as pseu-do-stilbene type molecules, which possess ultrafast photoresponsive time scale. The intensi-ties of the second-order harmonic generation of R-HANB powder were mostly in the intensehigher than that of Disperse Red 1, while their composite values of first hyperpolarlizabilitiesand ground state permanent dipole monents were in the order of >3.4×10-82 C2m4/V2. Thesecond harmonic coefficients for the poled R-HANB-doped PMMA films were in the orderof >7. 2×10-19 m4/V. The variation of these properties of R-HANB was explained well bythe electron and steric effects of substituents.

关 键 词：二阶非线性光学 推-拉型 偶氮苯 光谱 

分 类 号：O625.65[理学—有机化学]