Acta Phys. -Chim. Sin. ›› 2007, Vol. 23 ›› Issue (11): 1696-1700.doi: 10.3866/PKU.WHXB20071108

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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

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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