偶氮苯功能化聚酯的合成与二阶非线性光学特性  

SYNTHESES AND SECOND ORDER NONLINEAR OPTICAL PROPERTIES OF POLYESTERS FUNCTIONALIZED BY NITROAZOBENZENE DERIVATIVES

作　　者：颜星中[1,2] 蔡志岗[1,2] 杨佩青[1,2] 徐志凌[1,2] 何宜[1,2] 李庆行[1,2] 陈用烈[1,2] 梁兆熙[1,2] 

机构地区：[1]中山大学国家超快速激光光谱重点实验室 [2]中山大学高分子研究所

出　　处：《高分子材料科学与工程》1997年第4期104-108,共5页Polymer Materials Science & Engineering

基　　金：国家自然科学基金;广东省自然科学基金;高等学校博士学科点专项科研基金

摘　　要：合成了３种含偶氮苯侧基的聚酯并研究了其二阶非线性光学（ＮＬＯ）的特性。这类聚酯具有较好的成膜性能，聚合物的极性、链结构、生色团含量以及生色团不同聚集状态明显影响膜的吸收光谱和极化膜的二次谐波产生，其中以４′－（Ｎ，Ｎ′二羟乙基）－胺基－４－硝基偶氮苯与丁二酸酐合成的聚酯具有较强的ＮＬＯ效应，且在玻璃化温度以上极化膜的二次谐波衰减较慢，以４′－（Ｎ，Ｎ′二羟乙基）胺基－４－硝基偶氮苯与己二酰氯合成的聚酯因具液晶性在较低电压下可以极化。Three kinds of novel polyesters with the donors of azobenzenes covanlently linked their mainchains have been obtained through condensation of 4′ (N,N′ dihydroxyethyl) amino 4 nitroazobenzene or 3′ chlorine 4′ (N,N′ dihydroxyethyl) amino 4 nitroazobenzene with appropriate anhydrides. The film of poly(4′ bis(N,N′ oxyethylene) imino 4 nitroazobenzene adipyl) can be poled under low voltage, due to its liquid crystal nature. The poled film of poly(4′ bis(N,N′ oxyethylene) imino 4 nitroazobenzene succinyl) possesses the highest intensity and the slowest decay of second harmonic generation among the films of polyesters synthesized in this work. These results are related to the polarity, the mainchain structure and the chromophore content of polyesters, as well as the aggregation and the Maier Saupe type thermotropic interaction of the chromophores in polyesters.

关 键 词：偶氮苯染料 聚酯 液晶 非线性光学 染料 

分 类 号：O633.14[理学—高分子化学] O631.24[理学—化学]