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Vol. 25 No. 15 (2013): Vol 25 Issue 15

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A Highly Selective and Sensitive Fluorescent Sensor for Copper(II) Ion Characterized by One Dichlorofluorescein Moiety and Two Azathia-Crown Ether

https://doi.org/10.14233/ajchem.2013.14722
Yuzhu Jiang
College of Chemistry, Sichuan University, Chengdu 610064, P.R. China
Zhong Huang
Academy of Engineering Physics, Mianyang, Sichuan 621900, P.R. China
Huajun Dai
College of Chemistry, Sichuan University, Chengdu 610064, P.R. China
Lihua Wang
College of Chemistry, Sichuan University, Chengdu 610064, P.R. China
Liu Ying
College of Chemistry, Sichuan University, Chengdu 610064, P.R. China
Xingming Kou
College of Chemistry, Sichuan University, Chengdu 610064, P.R. China

Corresponding Author(s) : Xingming Kou

kouxm@scu.edu.cn

Asian Journal of Chemistry, Vol. 25 No. 15 (2013): Vol 25 Issue 15

Abstract

A new fluorescent sensor 1, which functionalized with one dichlorofluorescein moiety as fluorogenic signaling subunit and two azathia-crown ether macrocyclic as binding site was designed, synthesized and characterized. It was found that sensor 1 can selectively recognize Cu2+ by a remarkable emission quenching in DMSO-H2O (1:1, v/v), which was attributed to the 1:2 complex formation between 1 and Cu2+, while other ion including K+, Na+, Mg2+, Zn2+, Ba2+, Co2+, Ca2+, Fe2+, Fe3+, Pb2+, Pb2+, Ni2+ and Ag+ induced no or much small fluorescence changes. In addition, the sensor 1 exihibited a rapid, stable and linear response to Cu2+ in the concentration range from 5 × 10-7 to 1 × 10-5 mol L-1 with a detection limit as low as 8.7 × 10-8 mol L-1. Furthermore, the sensor 1 was applied to practical determination of Cu2+ in different water samples with satisfactory results.

Keywords

Fuorescent probe Azathia-crown ether Dichlorofluorescein Copper ion Fluorescence quenching
Jiang, Y., Huang, Z., Dai, H., Wang, L., Ying, L., & Kou, X. (2013). A Highly Selective and Sensitive Fluorescent Sensor for Copper(II) Ion Characterized by One Dichlorofluorescein Moiety and Two Azathia-Crown Ether. Asian Journal of Chemistry, 25(15), 8292–8296. https://doi.org/10.14233/ajchem.2013.14722
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