Acta Chimica Sinica ›› 2002, Vol. 60 ›› Issue (5): 789-794. Previous Articles     Next Articles

Original Articles

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

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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