物理化学学报 >> 2007, Vol. 23 >> Issue (11): 1696-1700.doi: 10.3866/PKU.WHXB20071108

研究论文 上一篇    下一篇

金属离子对咔唑修饰的芳醚树枝形聚合物的荧光猝灭作用

陈洁; 赵鑫; 陈金平; 李嫕   

  1. 中国科学院理化技术研究所有机光电功能材料与分子工程学重点实验室, 北京 100080; 中国科学院研究生院, 北京 100049
  • 收稿日期:2007-04-25 修回日期:2007-06-22 发布日期:2007-11-01
  • 通讯作者: 李嫕 E-mail:yili@mail.ipc.ac.cn

Fluorescence Quenching of Poly(aryl ether) Dendrimers by Metal Ions

CHEN Jie; ZHAO Xin; CHEN Jin-Ping; LI Yi   

  1. Laboratory of Organic Optoelectronic Functional Materials and Molecular Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China
  • Received:2007-04-25 Revised:2007-06-22 Published:2007-11-01
  • Contact: LI Yi E-mail:yili@mail.ipc.ac.cn

摘要: 合成了一系列外围带有咔唑, 核心带有或不带有氮杂冠醚结构的1-3代芳醚树枝形聚合物(CZ-Gn-CR, CZ-Gn-OH, n=1-3). 利用光物理方法研究了金属离子Li+、Na+、K+、Ca2+、Cu2+、Zn2+、Eu3+和Tb3+与树枝形聚合物之间的相互作用. 研究表明, Eu3+、Tb3+和Cu2+通过静态过程猝灭树枝形聚合物的荧光, 测定了Eu3+、Tb3+和Cu2+对CZ-Gn-CR、CZ-Gn-OH荧光的猝灭速率常数; 核心的冠醚结构可以增强树枝形聚合物与金属离子的相互作用. Li+、Na+、K+、Ca2+和Zn2+对CZ-Gn-CR和CZ-Gn-OH的紫外吸收光谱和荧光光谱均没有明显影响.

关键词: 树枝形聚合物, 金属离子, 荧光猝灭

Abstract: A series of poly(aryl ether) dendrimers with carbazole (CZ) at the periphery and with/without a crown ether at the core (CZ-Gn-CR/CZ-Gn-OH, n=1-3) were synthesized. The photophysical properties of CZ-Gn-CR and CZ-Gn-OH were investigated with different concentrations of Li+, Na+, K+, Ca2+, Cu2+, Zn2+, Eu3+, and Tb3+. There are interactions between the dendrimer and Eu3+, Tb3+, and Cu2+ in the ground state, and the crown ether structure at the core enhances the interactions. The fluorescence of the dendrimers was quenched by Eu3+, Tb3+, and Cu2+ via a static quenching process, and the quenching rate constants were calculated. Li +, Na+, K+, Ca2+, and Zn2+ have no obvious influence on the UV-absorption and fluorescence spectra of the dendrimers.

Key words: Dendrimer, Metal ions, Fluorescence quenching

MSC2000: 

  • O644