A highly sensitive and reversible chemosensor for Hg2+ detection based on porphyrin‐thymine conjugates |
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| Authors: | Xiangzhu He Duanguang Yang Hongbiao Chen Wei Zheng Huaming Li |
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| Institution: | 1. College of Chemistry, Xiangtan University, Xiangtan, Hunan Province, China;2. Key Laboratory of Polymeric Materials and Application Technology of Hunan Province, Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, and Key Lab of Environment‐Friendly Chemistry and Application of Ministry of Education, Xiangtan University, Xiangtan, Hunan Province, China |
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| Abstract: | In this study, we demonstrated a highly sensitive, selective, and reversible chemosensor for Hg2+ determination. This chemosensor was synthesized by direct condensation of thymin‐1‐ylacetic acid with zinc tetraaminoporphyrin, which has a porphyrin core as the fluorophore and four thymine (T) moieties as the specific interaction sites for Hg2+. The probe (4T‐ZnP) exhibited split Soret bands with a small peak at 408 nm and a strong band at 429 nm in a dimethylformamide/H2O (7/3, v/v) mixed solvent as well as a strong emission band at 614 nm. Upon the addition of Hg2+, the probe displayed strong fluorescence quenching due to the formation of T‐Hg2+‐T complexes. With the aid of the fluorescence spectrometer, the chemosensor in the dimethylformamide/H2O (7/3, v/v) mixed solvent (0.3 μM) exhibited a detection limit of 6.7 nM. Interferences from other common cations, such as Co2+, K+, Sn2+, Zn2+, Cu2+, Ni2+, Mn2+, Na+, Ca2+, Mg2+, Pb2+, and Cd2+, associated with Hg2+ analysis were effectively inhibited. Copyright © 2015 John Wiley & Sons, Ltd. |
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| Keywords: | mercury chemosensor porphyrin thymine |
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