化学学报 ›› 1991, Vol. 49 ›› Issue (3): 278-283. 上一篇    下一篇

研究论文

咔唑及其衍生物对 9-氰基蒽的荧光猝灭机理的研究

白凤莲;王竹庭;樊琳;陈尚贤;虞群;叶建平   

  1. 中国科学院化学研究所;中国科学院感光化学研究所
  • 发布日期:1991-03-15

Study on 9-cyanoanthracene fluorescence quenching mechanism by carbazole and its derivatives

BAI FENGLIAN;WANG ZHUTING;FAN LIN;CHEN SHANGXIAN;YU QUN;YE JIANPING   

  • Published:1991-03-15

本文研究咔唑及其衍生物对9-氰基蒽(9CNA)的荧光猝灭机理。结果表明, 猝灭过程有以下三种方式:(1)一系列N-烷基咔唑及1,4-二咔唑丁烷、反式1,2-二咔唑环丁烷、N-苄基咔唑等对9CNA的荧光猝灭是通过形成激基复合物。(2)咔唑对9CNA的荧光猝灭是通过形成氢键。(3)1,3-二咔唑丙烷及N-痖烯基咔唑对9CNA的荧光猝灭是属于一般碰撞猝灭过程。以上所有猝灭过程主要都是来自电荷转移相互作用。另外, 还讨论了空间位阻对形成激基复合物的影响。并由稳态和动态荧光实验结果,应用Ware关于激基复合物的形成和解离的动力学公式计算出一系列光物理速率常数。

关键词: 咔唑, 氰基, 立体结构, 蒽 P, 电荷转移, 荧光猝灭剂, 相互作用, N-苄基, 环丁烷, 猝灭

The quenching mechanism of 9-cyanoanthracene (I) fluorescence by carbazole and its derivatives was studied. The results show that the quenching process can be in three different ways: exciplex formation, H-bonding formation in the excited state of I and general collision. All the above quenching effects chiefly come from charge transfer interation. In addition, the steric hindrance is also important for exciplex formation. The photophys. rate constants were obtained based on Ware kinetics scheme of exciplex formation and dissociation Both steadystate and transient fluorescence measurements were employed for the determination of the rate constants

Key words: CARBAZOLE, CYANO GROUP, SPATIAL STRUCTURE, ANTHRACENE P, CHARGE TRANSFER, FLUORESCENCE QUENCHER, INTERACTIONS, N-BENZYL GROUP, CYCLOBUTANE, QUENCHING

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