期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 245, 期 -, 页码 702-710出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.01.167
关键词
Phenothiazine coumarin; Fluorescent probe; Red-emitting; Large stokes shift; Thiophenol detection
资金
- Guangxi Natural Science Foundation [2016GXNSFBA380229]
- BAGUI Scholar program of Guangxi Province of China
- Open Fund of Guangxi Teachers Education University [2016HXBSD07]
By introducing phenothiazine framework as an electron donating component, we have developed a unique deep-red functional fluorescent dye 5b, bearing excellent photophysical properties. Using dye 5b as a platform, we further constructed a novel red emitting fluorescent probe (1) for thiophenol on the basis of a unique thiophenol-mediated substitution-cyclization-hydrolysis reaction cascade. Probe 1 exhibits highly selective and sensitive response to thiophenol over aliphatic thiols, with a detection limit of 2.9 nM (S/N = 3). Moreover, this probe features a remarkable large Stokes shift (141 nm) in PB buffer (pH= 7.4, containing 1 mM CTAB). Importantly, it was successfully applied for detection of thiophenol both in real water samples and in living HeLa cells, indicating that this probe has great potential for practical applications. (C) 2017 Elsevier B.V. All rights reserved.
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