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有机二阶非线性光学发色团是非线性光学材料的重要组成部分.一直以来,科学家们致力于通过结构设计与修饰来研究合成新型的性能良好的发色团.然而如何将有机二阶非线性光学发色团微观一阶超极化率β值高效地转化为宏观电光系数r33,一直是极具挑战性的课题.近几年来,有诸多报道通过引入一些隔离基团来改变发色团的形状,可以有效地减少极化过程中分子之间的偶极相互作用力,有利于实现大的宏观电光系数r33值.结合本课题组的研究,系统总结了近些年有关在发色团中引入一些修饰隔离基团的研究工作.
Organic second-order nonlinear optical chromophore is an important part of non-linear optical materials.However, scientists have been devoted to the study of the synthesis of new and well-behaved chromophores through structural design and modification.However, It has been a challenging task to efficiently convert the first-order hyperpolarizability β values of optical chromophores into macroscopic electro-optic coefficients r33. In recent years, there are many reports on the changes of chromophores by introducing some spacer groups Shape, which can effectively reduce the dipole interaction force between molecules in the polarization process, is conducive to achieving a large macroscopic r33 value of electro-optic coefficient.With the research group, the system summarizes the recent years in the chromophore The introduction of some modified isolation group research work.