激发态卟啉衍生物的研究——Ⅵ.四苯基卟吩光谱特性的邻位取代效应  

STUDIES ON EXCITED PORPHYRIN DERIVATIVES Ⅵ.Ortho-Substitution Effect on the Spectral Properties of Tetraphenylporphyrin Derivatives

作　　者：冯扬波 郭础[1] 谢虹[2] 韩士田[2] 张长久[2] 

机构地区：[1]北京理工大学应用物理系 [2]河北师范学院化学系

出　　处：《光谱学与光谱分析》1989年第3期1-4,共4页Spectroscopy and Spectral Analysis

摘　　要：测定了一个苯环上不同位置被氨基取代的四苯基卟吩衍生物的吸收和发射光谱及荧光寿命。结果表明,邻位取代对光谱性质的影响表现出明显的特殊性,即电子跃迁强度减小和荧光寿命出现增大的趋势。这种邻位取代效应并不能用诱导效应来解释,它是由于取代基改变了苯环和卟啉环共轭相互作用的程度所致。The electronical absorption and fluorescence (?)nissien cha acteristics of tetraphenylporphyin with an amino group attached to different position of one of its four phenylrings have been examined. The results obtained reveal a pronounced ortho-substitution effect on the optical transition probability including electronical absorption and fluorescence decay. Based on the four orbital theory developed by M.Gouterman, this ortho-substitution effect can be interpreted in terms of the change in conjugation between the π-electron systems of both phenyland porphyrin rings due to the steric hindrance of the substituent.

关 键 词：激发态 卟啉衍生物 光谱性质 

分 类 号：O626[理学—有机化学]