新型有机/无机聚合物网络的合成与二阶非线性光学

合成了含双官能团的生色团4’-(N,N-二羟乙基)氨基-4-硝基偶氮苯(DR19),采用溶胶-凝胶方法,通过"两端"交联设计合成了光学性能良好的二阶非线性新型有机/无机复合聚合物网络.经过极化交联后,其在室温和较高温度下均具有良好的二次谐波产生(SHG)稳定性,表明该交联聚合体系能形成致密的硅-氧网络,从而有效地抑制生色团分子的取向松弛.

SYNTHESIS AND SECOND-ORDER NONLINEARITY OF NOVEL ORGANIC/INORGANIC NETWORK BY SOL-GEL PROCESS

Chromophore with two active OH groups 4'-(N,N-dihydroxyethyl)amino-4-nitroazobenzene(DR19) was synthesized and a novel organic/inorganic polymer network with fine second-order nonlinearities was designed and prepared by double-end crosslinking of DR19 through sol-gel process.It was observed that this polymer film had good SHG thermal stability under room and elevated temperatures.The results show that this crosslinking system formed a dense silicon-oxygen network structure,thus could effectively inhibit the orientation relaxation of the chromophore molecules and hence improve the thermal stability of second-order nonlinearity of the material.