Journal
LUMINESCENCE
Volume 29, Issue 7, Pages 749-753Publisher
WILEY
DOI: 10.1002/bio.2616
Keywords
colorimetric; fluorescent probe; sulfite
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Funding
- NSF of China [21072235, 21250110062]
- Fundamental Research Fund for the Central Universities
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A colorimetric and ratiometric fluorescent sulfite probe, the levulinate of 4-hydroxynaphthalimide, was successfully synthesized from 4-hydroxy-naphthalimide and levulinic acid. Through sulfite-mediated intramolecular cleavage, the probe was converted into 4-hydroxynaphthalimide, which when excited at 450 nm, displayed a large Stokes shift due to the intramolecular charge transfer process. The probe exhibited high selectivity and sensitivity towards sulfite over other typical anionic species (F-, Cl-, Br-, I-, HPO42-, SO42 -, NO3-, AcO-, ClO4-, HCO3-) in HEPES-buffered solution (25 mM, pH 7.4, 50% acetonitrile, v/v). Copyright (C) 2013 John Wiley & Sons, Ltd.
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