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Citation: CHEN Jie, ZHAO Xin, CHEN Jin-Ping, LI Yi. Fluorescence Quenching of Poly(aryl ether) Dendrimers by Metal Ions[J]. Acta Physico-Chimica Sinica, ;2007, 23(11): 1696-1700. doi: 10.3866/PKU.WHXB20071108 shu

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

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 Date: 25 April 2007
Available Online: 3 September 2007

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.
- Dendrimer; Metal ions; Fluorescence quenching
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