物理化学学报 >> 2006, Vol. 22 >> Issue (03): 326-329.doi: 10.1016/S1872-1508(06)60008-9

研究论文 上一篇    下一篇

树枝形聚合物修饰的双8-羟基喹啉光物理研究

张鲁; 游长江; 陈金平; 杨国强; 李嫕   

  1. 中国科学院理化技术研究所, 北京 100101; 中国科学院化学研究所光化学重点实验室, 北京 100080; 中国科学院研究生院, 北京 100049
  • 收稿日期:2005-09-27 修回日期:2005-11-02 发布日期:2006-03-10
  • 通讯作者: 李嫕 E-mail:yili@mail.ipc.ac.cn

Dendritic Bis-(8-hydroxyquinoline) Derivatives: Studies on the Fluorescence Quenching and Decay

ZHANG Lu; YOU Chang-Jiang; CHEN Jin-Ping; YANG Guo-Qiang; LI Yi   

  1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, P. R. China; Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2005-09-27 Revised:2005-11-02 Published:2006-03-10
  • Contact: LI Yi E-mail:yili@mail.ipc.ac.cn

摘要: 研究了树枝形聚合物修饰的双8-羟基喹啉衍生物(Gn-QMQ, n=1~3)在二氯甲烷和乙腈中的荧光猝灭过程和荧光衰减过程. 随着代数n的增加, 猝灭速率常数减小, 核心双8-羟基喹啉基团荧光寿命增长, 非辐射失活速率常数减小. 研究结果表明, 随着代数的增加, 树枝形骨架对核心基团的位点分离作用增大, 在乙腈中树枝形骨架趋于紧密构象, 具有更强的位点分离作用.

关键词: 芳醚树枝形聚合物, 8-羟基喹啉, 荧光猝灭, 荧光衰减

Abstract: The fluorescence quenching and the fluorescence decay of a series of dendritic bis-(8-hydroxyquinoline) derivatives (Gn-QMQ, n=1~3) were studied. The quenching rate constant decreased and fluorescence lifetime increased with the generation n increase, which resulted from an increased site-isolating effect of the dendritic structure on the core. Photophysical studies in different solvents indicated that there was an enhanced site-isolating effect in CH3CN.

Key words: Poly(aryl ether) dendrimer, 8-hydroxyquinoline, Fluorescence quenching, Fluorescence decay