期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 261, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2021.120009
关键词
Fluorescent probe; Fluorescent quenching; Dansyl; Cu2+; Coordination
类别
资金
- National Key R&D Program of China [2017YFB0308701]
- Support Project of Highlevel Teachers in Beijing Municipal Universities in the Period of 13th Fiveyear Plan [CITTCD201804026]
The fluorescent probe D-GT shows excellent detection performance towards Cu2+ in aqueous solutions, displaying sensitivity and versatility in real environments. The 1:1 coordinate stoichiometry and high association constant with Cu2+ make it a promising tool for detecting copper ions.
A fluorescent probe based on a glycyl-L-tyrosine-modified dansyl derivative (D-GT) is designed and synthesized. D-GT demonstrated great detection performance toward Cu2+ in an aqueous solution. Fluorescence quenching occurred due to the coordination of Cu2+ with D-GT. The sensitive detection of D-GT to Cu2+ was applied in aqueous solution within a wide pH span (6-12). A 1:1 coordinate stoichiometric way and an association constant of 6.47 x 10(4) M-1 between D-GT and Cu2+ were determined. The measured detection limit for Cu2+ in HEPES buffer solution (10 mM, pH 7.4) was 0.69 mu M. The probe displayed an appropriate sensitivity toward Cu2+ in real drinking water samples and living cells, which reveals the potential applications of D-GT in complicated environments. (C) 2021 Elsevier B.V. All rights reserved.
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