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化学学报
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化学学报 ›› 2002, Vol. 60 ›› Issue (5): 789-794. 上一篇    下一篇

研究论文

有机生色团/SiO_2-TiO_2二阶非线性光学杂化材料的研究

李旭华;袁荞龙;王得宁;何斌;钱枫   

  1. 华东理工大学材料学院.上海(200237);华东理工大学分析测试中心.上海 (200237)
  • 发布日期:2002-05-15

Organic Chromophore Group/SiO_2-TiO_2 Hybrid Material for Organic- Inorganic Second-Order Nonlinear Optics

Li Xuhua;Yuan Qiaolong;Wang Dening;He Bin;Qian Feng   

  1. Institute of Materials Science and Engineering, East China University of Science and Technology.Shanghai(200237);Center of Analysis and Testing, East China University of Science and Technology. Shanghai(200237)
  • Published:2002-05-15

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519

被引次数

4

以分散橙－3（DO－3）与γ－缩水甘油氧与基三甲氧基硅烷（KH－560）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/SiO_2-TiO_2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X~ (2) is 1.43 * 10~(-7) esu。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－可见光谱对杂化膜在极化前后的取向及取向稳定性进行了研 究。

关键词: 杂化材料, 非线性光学, 取向, 稳定性, 偶氮染料, 硅烷 P, 溶胶-凝胶法

A new type of organic chromophore group/SiO_2-TiO_2 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 SiO_2, TiO_2 and the organic chromophore group and the size of the particles is about 20～80 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 Φ of the transparent poled film of the hybrid material, prepared by spin- coating, thermal curing and corona poling at 190 ℃ for 1 hour, can reach 0.38 and the second-order nonlinear optical polarizability X~(2) is 1.43 * 10~(-7) esu according to one dimensional rigid oriented gas model (1DROGM). The poled film exhibits good orientation stability and its glass transition temperature is 196 ℃.

Key words: HYBRID MATERIALS, NON LINEAR OPTICS, ORIENTATION, ORIENTATION, AZO DYES, SILANE P, SOL-GEL PROCESS

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