Journal
LUMINESCENCE
Volume 28, Issue 2, Pages 97-101Publisher
WILEY
DOI: 10.1002/bio.2344
Keywords
bisulphite anion; ratiometric fluorescent probe; intramolecular charge transfer; benzimidazole
Categories
Funding
- Science and Technology Department [SJ08B05]
- Education Department of Shaanxi Province, China [09JK787]
- NWU Graduate Experimental Research Funds [09YSY19]
- National Science Foundation for Fostering Talents in Basic Research of the National Natural Science Foundation of China [J0830417]
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4-(1H-benzimidazol-2-yl)benzaldehyde (1) has been developed as a new ratiometric fluorescent probe for bisulphite, based on the modulation of intramolecular charge transfer (ICT). Upon mixing with bisulphite in aqueous ethanol, an aldehydebisulphite adduct was formed and the ICT of the probe was switched off, which resulted in a ratiometric fluorescence response with an enhancement of the ratios of emission intensities at 368 and 498nm. The detection range of the probe for bisulphite is in the 2.0200 mu mol/L concentration range and the detection limit is 0.4 mu mol/L. Probe 1 produces a ratiometric fluorescent response to bisulphite with a marked emission wavelength shift (130nm) and displays high selectivity for bisulphite over other anions. Copyright (c) 2012 John Wiley & Sons, Ltd.
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