A fluorescent chemical sensor for Hg(II) based on a corrole derivative in a PVC matrix

Chun-Lian He; Feng-Lian Ren; Xiao-Bing Zhang; Zhi-Xiang Han

doi:10.1016/j.talanta.2006.02.051

A fluorescent chemical sensor for Hg(II) based on a corrole derivative in a PVC matrix

Talanta. 2006 Sep 15;70(2):364-9. doi: 10.1016/j.talanta.2006.02.051. Epub 2006 Mar 24.

Authors

Chun-Lian He¹, Feng-Lian Ren, Xiao-Bing Zhang, Zhi-Xiang Han

Affiliation

¹ College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, PR China; Medical College, Hunan Normal University, Changsha 410006, PR China.

PMID: 18970776
DOI: 10.1016/j.talanta.2006.02.051

Abstract

A fluorescent chemical sensor for Hg(II) using 5,10,15-tris(pentafluorophenyl)corrole (H(3)(tpfc)) as fluorophore is described in this paper. The response of the sensor is based on the fluorescence quenching of H(3)(tpfc) by coordination with Hg(II). H(3)(tpfc) based sensor shows a linear response towards Hg(II) in the concentration range from 1.2x10(-7) to 1.0x10(-4)M, with a working pH range from 5.0 to 8.0. The response time for Hg(II) concentration </=1.0x10(-5)M is less than 5min. The sensor shows good selectivity for Hg(II) over alkali, and alkaline earth, and most of transition metal cations. The effect of the composition of the sensor membrane has been studied and the experimental conditions optimized. The corrole based sensor membrane can be easily regenerated just by washing with blank buffer solution after each measurement. The sensor has been used for determination of Hg(II) in water samples with satisfactory results.