Highly selective, sensitive and fast-responsive fluorescent sensor for Hg(2+)

Qingfen Niu; Xingxing Wu; Tianduo Li; Yuezhi Cui; Shanshan Zhang; Xiaoyan Li

doi:10.1016/j.saa.2016.03.029

Highly selective, sensitive and fast-responsive fluorescent sensor for Hg(2+)

Spectrochim Acta A Mol Biomol Spectrosc. 2016 Jun 15:163:45-8. doi: 10.1016/j.saa.2016.03.029. Epub 2016 Mar 22.

Authors

Qingfen Niu¹, Xingxing Wu², Tianduo Li², Yuezhi Cui², Shanshan Zhang², Xiaoyan Li³

Affiliations

¹ Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, People's Republic of China. Electronic address: qf_niu1216@qlu.edu.cn.
² Shandong Provincial Key Laboratory of Fine Chemicals, School of Chemistry and Pharmaceutical Engineering, Qilu University of Technology, Jinan 250353, People's Republic of China.
³ School of Chemistry and Chemical Engineering, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China.

PMID: 27049866
DOI: 10.1016/j.saa.2016.03.029

Abstract

A phenylamine-oligothiophene-based fluorescent sensor 2TBEA was reported. This sensor exhibited highly selective, sensitive and rapid detection of Hg(2+) ion in THF/H2O (7/3, v/v) solution through fluorescence quenching. The detection was unaffected by the coexistence of other competitive metal cations including Na(+), K(+), Ag(+), Ca(2+), Fe(3+), Al(3+), Co(2+), Cu(2+), Ni(2+), Zn(2+), Pb(2+), Cd(2+), Fe(2+) and Cr(3+). A1:1 binding ratio for 2TBEA - Hg(2+) was demonstrated by Job's plot and mole-ratio curves. The coordination process was chemically reversible with EDTA. The detection limit was evaluated to be as low as 6.164×10(-8)M.

Keywords: Fluorescence sensor; Mercury ion; Phenylamine-oligothiophene derivate; Quenching.

Publication types

Research Support, Non-U.S. Gov't