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^+、Ca^(2+)、Cu^(2+)、Zn^(2+)、Eu^(3+)和Tb^(3+)与树枝形聚合物之间的相互作用.研究表明,Eu^(3+)、Tb^(3+)和Cu^(2+)通过静态过程猝灭树枝形聚合物的荧光,测定了Eu^(3+)、Tb^(3+)和Cu^(2+)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^+、Ca^(2+)和Zn^(2+)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.
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^＋, Ca^2＋, Cu^2＋, Zn^2＋, Eu^3＋, and Tb^3＋. There are interactions between the dendrimer and Eu^3＋, Tb^3＋, and Cu^2＋ in the ground state, and the crown ether structure at the core enhances the interactions. The fluorescence of the dendrimers was quenched by Eu^3＋, Tb^3＋, and Cu^2＋ via a static quenching process, and the quenching rate constants were calculated. Li^＋, Na^＋, K^＋, Ca^2＋, and Zn^2＋ have no obvious influence on the UV-absorption and fluorescence spectra of the dendrimers.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2007年第11期1696-1700,共5页
Acta Physico-Chimica Sinica
基金
国家自然科学基金(20574086)
国家重点基础研究发展规划(2007CB808004)资助项目
