A Selective Colorimetric and Turn-on Fluorescent Chemosensor for Hg2+ in Aqueous Solution

Yi-Ru Chiou; Chin-Feng Wan; An-Tai Wu

doi:10.1007/s10895-016-1960-7

A Selective Colorimetric and Turn-on Fluorescent Chemosensor for Hg²⁺ in Aqueous Solution

J Fluoresc. 2017 Jan;27(1):317-322. doi: 10.1007/s10895-016-1960-7. Epub 2016 Oct 28.

Authors

Yi-Ru Chiou¹, Chin-Feng Wan², An-Tai Wu³

Affiliations

¹ Department of Chemistry, National Changhua University of Education, Changhua, 50058, Taiwan.
² Department of Medical Applied Chemistry, Chung Shan Medical University, No.110, Sec. 1, Jianguo N. Rd, Taichung City, 40201, Taiwan.
³ Department of Chemistry, National Changhua University of Education, Changhua, 50058, Taiwan. antai@cc.ncue.edu.tw.

PMID: 27796626
DOI: 10.1007/s10895-016-1960-7

Abstract

A simple colorimetric and turn-on fluorescence receptor FT (thiophene appended fluorescein-hydrazone derivative) was prepared and its cation-sensing properties were investigated. Receptor FT displayed a selective colorimetric change (from colorless to orange color) upon binding to Hg²⁺ in DMSO/H₂O (1:9, v/v) solution. The association constant of FT-Hg²⁺ complex was calculated to be 3.03 × 10⁹ M^-1, and the detection limit for Hg²⁺ was found to be 0.24 ppm.

Keywords: Colorimetric; Fluorescence; Thiophene; Turn-on.