期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 188, 期 -, 页码 1116-1122出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.08.008
关键词
Quinoline-based derivative; Fluorescent sensor; Zn/Cd ions; Biological imaging; Cysteine
资金
- NSFY of China [21002049]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [10KJB150005]
- Opening Project of State Key Laboratory of Chemo/Biosensing and Chemometrics of Hunan University
- Scientific Research Foundation for the Returned Overseas Chinese Scholars of State Education Ministry
A quinoline-based fluorescent chemosensor was reported for the simultaneous detection of Zn2+ and Cd2+ in aqueous solution. In HEPES buffer, among various metal ions, only Zn2+ and Cd2+ exhibited fluorescence enhancement at 497 nm accompanied by the red-shift emission wavelength. The mechanism was proposed that internal charge transfer effect induced by binding with Zn2+ or Cd2+ produced the fluorescence changes. With the addition of cysteine, the fluorescent solution containing sensor and Cd2+ show the decreased fluorescence at 497 nm and the increased fluorescence at 420 nm, which was attributed to the dissociation of the complex formed by sensor and Cd2+. In contrast, the fluorescence of solution containing sensor and Zn2+ is unchanged with the addition of Cys. Furthermore, the confocal microscopy experiments indicated that this sensor can provide real-time detection for intracellular Zn2+ and Cd2+. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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