摘要
以分散橙 3(DO 3)与γ 缩水甘油氧丙基三甲氧基硅烷 (KH 5 6 0 )反应得到的功能性生色团ASD为前体 ,采用溶胶 -凝胶 (sol gel)法使ASD与钛酸四正丁酯在酸性条件下共水解缩合 ,合成了新型稳定的有机生色团 /SiO2 TiO2杂化溶胶 ,并对该溶胶体系的相图进行了研究 .利用傅立叶红外 (FTIR)、透射电镜 (TEM)和X射线能量色散谱仪(EDS)研究了杂化溶胶形成过程中的络合机理及溶胶形态 .由一维刚性取向气体模型计算杂化材料膜的二阶非线性光学 (NLO)系数 χ( 2 ) 达 1.43× 10 -7esu .差示扫描量热法 (DSC)测得杂化材料的玻璃化温度可达 196℃ ;用紫外
A new type of organic chromophore group/SiO2-TiO2 second-order nonlinear optical (NLO) materials has been obtained by sol-gel process from titanium butoxide [Ti(OBu)(4)] and an alkoxysilane dye (ASD) synthesized by coupling disperse orange-3 (DO-3) with (3-glycidoxypropyl) trimethoxysilane (KH-560). The phase diagram of the system was investigated and a stable hybrid sol was prepared. Research by X-ray energy dispersion spectrum (EDS) and transmission electronic microscope (TEM) shows that the hybrid sol particles consist of SiO2, TiO2 and the organic chromophore group and the size of the particles is about 20similar to80 nm. Moreover the mechanism of the complexing reaction was also investigated by Fourier transform infrared spectrometer (FTIR) in the preparation process of the hybrid sol. The ordering parameter Phi of the transparent poled film of the hybrid material, prepared by spin-coating, thermal curing and corona poling at 190degreesC for 1 hour, can reach 0.38 and the second-order nonlinear optical Polarizability chi((2)) is 1.43x10(-7) esu. according to one dimensional rigid oriented gas model (1DROGM). The poled film exhibits good orientation stability and its glass transition temperature is 196degreesC.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2002年第5期789-794,共6页
Acta Chimica Sinica
基金
国家自然科学基金 (No .5 0 0 730 0 5 )资助项目
