【摘要】 合成了五种具有二嗜性、能形成单分子膜,又具有大的二阶非线性极化率β的有机染料——半花菁和苯腙衍生物。将它们制备成均一或混合的单分子层和多层LB膜。用相对法测定了它们的β值,证实了半花菁和部分苯腙衍生物具有高达3.711×10^-49c³·m³·J^-2的β值。用X射线小角衍射、紫外-可见吸收光谱、荧光光谱及二次光学谐波信号,对LB膜进行了表征,给出了膜中分子取向和排列情况,证实膜中分子存在J聚体形式。更多还原

【Abstract】 Five kinds of amphiphilic hemicyanine and phenylhydrazon dyes which can from monomolecular film and have large molecular second order non-linear susceptibilities β value were synthesized. Their homogeneous or mixed monolayer and multilayer films were made up. Through the measure of the Second-Harmonic Signal with relative methods, their value were measured to 3.711×10^-49c³. m³. J^-2. The properties of LB films were characterized by using Shallow-Angle X-Ray Diffraction, UV-Vis Light Absorption Spectrum, Fluorescence Spectrum and Second-Harmonic Signal. The orientation and arrangement of molecules in LB films were given, thus it showes to be J-Aggregation forms in LB films.更多还原