Fluorescence Quenching of Poly(aryl ether) Dendrimers by Metal Ions
Fluorescence Quenching of Poly(aryl ether) Dendrimers by Metal Ions
复制标题
金属离子对聚芳醚树枝状聚合物的荧光猝灭
DOI：
10.3866/pku.whxb20071108
复制
发表时间：
2007
影响因子：
10.9
通讯作者：
中科院分区：
文献类型：
--
作者：
一系列聚在外围具有咔唑（CZ）并且在核心具有/不具有冠醚的（芳基醚）树枝状聚合物合成了（CZ-Gn-CR/CZ-Gn-OH，n=1-3）CZ-Gn-CR和CZ-Gn-OH，研究了它们在不同浓度的Li+、Na+、K+、Ca 2+、Cu 2+、Zn 2+、Eu 3+、树枝状大分子与Eu ~（3+）、Tb~（3+）和Cu~（2+）在基态存在相互作用，且冠醚结构增强了这种相互作用，Eu~（3+）、Tb~（3+）和Cu~（2+）对树枝状大分子的荧光有静态猝灭作用，Li~+、Na~+、K~（2+）、Ca~（2+）、Zn~（2+）对树枝状大分子的紫外吸收光谱和荧光光谱无明显影响。
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 Eu3+,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~(2+),Ca~(2+),and Zn~(2+) have no obvious influence on the UV-absorption and fluorescence spectra of the dendrimers.