Preparation and nonlinear optical properties of inorganic-organic hybrid films with various substituents on chromophores.
Preparation and nonlinear optical properties of inorganic-organic hybrid films with various substituents on chromophores.
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DOI：
10.1021/jp0549677
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发表时间：
2005-11
期刊：
影响因子：
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通讯作者：
Yuanjing Cui;G. Qian;Junkuo Gao;Lujian Chen;Zhiyu Wang;Min-quan Wang
中科院分区：
文献类型：
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作者：
Yuanjing Cui;G. Qian;Junkuo Gao;Lujian Chen;Zhiyu Wang;Min-quan Wang
合成了4种含不同取代基的端羟基偶氮苯类发色团作为电子给体或电子受体，并与3-异氰酸基丙基三乙氧基硅烷（ICTES）通过氨基甲酸酯反应合成了烷氧基硅烷染料。采用溶胶-凝胶法制备了有机-无机杂化非线性光学薄膜。通过元素分析、FTIR和1H NMR证实了所得膜的分子结构。通过溶剂化显色法评估发色团的betaCT μ（g）值，并且通过原位二次谐波产生（SHG）测量来测量杂化膜的二次谐波系数（d33）。杂化薄膜在可见光范围内表现出很大的光学非线性和全透明性。讨论了取代基和取代位置对发色团的β CT μ（g）值和膜的d33值的影响。
Four kinds of hydroxy-ended azobenzene-type chromophores containing different substituent groups as electron donor or electron acceptor were synthesized and further reacted with 3-isocyanatopropyltriethoxysilane (ICTES) to give alkoxysilane dyes via a urethane reaction. Following a sol-gel process of the alkoxysilane dyes, the inorganic-organic hybrid nonlinear optical (NLO) films were successfully prepared. Molecular structures of the resultant films were confirmed by elemental analysis, FTIR, and 1H NMR. The betaCT mu(g) values of the chromophores were evaluated by a solvatochromic method, and the second harmonic coefficients (d33) of the hybrid films were measured by in situ second harmonic generation (SHG) measurement. The hybrid films exhibited large optical nonlinearity and full transparency in the visible range. The effects of substituent group and position on betaCT mu(g) values of the chromophores and d33 values of the films were also discussed.