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Spectrochim Acta A Mol Biomol Spectrosc. 2019 Jun 5;216:45-51. doi: 10.1016/j.saa.2019.03.016. Epub 2019 Mar 8.

Synthesis of methionine methyl ester-modified coumarin as the fluorescent-colorimetric chemosensor for selective detection Cu2+ with application in molecular logic gate.

Author information

1
School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui Province 236037, China; Anhui Province Key Laboratory for Degradation and Monitoring of Pollution of the Environment, 236037, China.
2
School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui Province 236037, China.
3
School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui Province 236037, China; Anhui Province Key Laboratory for Degradation and Monitoring of Pollution of the Environment, 236037, China. Electronic address: qiaorui@mail.ipc.ac.cn.

Abstract

A methionine methyl ester-modified coumarin derivative was designed and synthesized, which could discriminate Cu2+ from other metal ions in HEPES buffer (10 mM, pH 7.4)/CH3CN (40:60, V/V). The detection limit of WM toward Cu2+ was 1.84 × 10-7 M, which was lower than the concentration of Cu2+ in drinking water suggested by WHO and EPA. And the proposed coordination mode exhibiting the interaction between WM and Cu2+ was studied by UV-Vis, fluorescence spectrum, ESI-MS and FT-IR. Based on the fluorescent reversibility of WM, WM was considered as a molecular logic gate and molecular keypad lock. In addition, the test strips and the silica gel plates prepared from the solution of WM also demonstrate the favorable selectivity toward Cu2+.

KEYWORDS:

Coumarin; Cu(2+); Fluorescent probes; IMPLICATION logic gate; Silica gel plates; Test strips

PMID:
30877893
DOI:
10.1016/j.saa.2019.03.016
[Indexed for MEDLINE]

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