超瑞利散射测定偶氮分子的一阶超极化率

The First-order Molecular Hyperpolarizability of Azo Diol and Azo Aldimine Measured by Hyper-Rayleigh Scattering

用超瑞利散射技术测定了双羟乙氨基-硝基偶氮苯和偶氮-水杨醛的5个偶氮化合物的一阶超极化率。2个双羟乙氨基-硝基偶氮苯由于有效的给体-受体组合,使其β值达到177×10-30esu和211×10-30esu;而2个偶氮-水杨醛席夫碱同时存在二维分子内质子转移和分子内电荷转移,β值分别为87×10-30esu和94×10-30esu。这些偶氮生色分子显现出光学非线性-透明性-热稳定性三者之间综合平衡的良好性能。

The first hyperpolarizability of five azo chromophores were determined by hyper-Rayleigh scattering in solution at 1064 nm.The effective dihydroxyl donor and nitro acceptor expanded the first-order hyperpolarizabilities of azo diol chromophores,the measured β_~HRS being 177×10^-30esu and 211×10^-30esu.There exist two-dimentional charge transfer and intramolecular proton transfer in azo aldimines,their first-order hyperpolarizabilities being 87×10^-30esu and 94×10^-30esu.These azo chromophores exhibit nonlinearity-thermal stability trade-off.