近年来,一些具有分子内电荷转移特性的共轭π-电子体系化合物以其独特的结构及光物理光化学性质引起了光化学家的重视.这类化合物的光谱对环境有很强的依赖性,一般都是溶剂显色型化合物,其激发态偶极矩往往大于基态偶极矩.这些在光作用下表现出来的独特性质与行为,使之有可能成为新一代的光功能材料,如荧光探针、激光染料、有机非线性光 In recent years, some conjugated π-electron system compounds with intramolecular charge-transfer properties have attracted the attention of photochemists due to their unique structure and photophysical photochemical properties. The spectra of these compounds have a strong dependence on the environment, Are all solvent color-forming compounds whose dipole moments in excited state tend to be larger than those in ground state.The unique properties and behaviors under the action of light make it possible to become a new generation of optical functional materials such as fluorescent probes , Laser dyes, organic non-linear light