Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 235, Issue -, Pages 362-369Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.05.099
Keywords
TICT; Two-photon; Fluorescent probe; Coumarin; Bisulfite anion
Funding
- National Natural Science Foundation of China [21102002, 21272223, 21372005]
- Jiangsu Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipments
- Anhui University
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A two-photon fluorescent probe (DMPCA) for the detection of bisulfite anion in water was developed based on twisted-intramolecular-charge-transfer (TICT) mechanism. Fluorescence intensity of DMPCA increased dramatically (65 fold) upon the addition of HS O-3(-). The two-photon absorption cross-section of DMPCA was found to be 725 GM at 700 nm upon the addition of HSO3-. The fluorescent probe showed an excellent selectivity for bisulfite anion over other anions. The nucleophilic addition reaction mechanism with aldehyde was confirmed with NMR and MALDI-TOF. The TICT detection mechanism was confirmed by viscosity-dependent fluorescence spectra and time resolved fluorescence spectra. Moreover, DMPCA was successfully applied to the detection of bisulfite anion in HeLa cells with low cytotoxicity under two-photon excitation. (C) 2016 Elsevier B.V. All rights reserved.
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