title: A colorimetric and ratiometric fluorescent probe for sulfite based on an intramolecular cleavage mechanism.
abstract: 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(-), HPO(4)(2-), SO(4)(2-), NO(3)(-), AcO(-), ClO(4)(-), HCO(3)(-)) in HEPES-buffered solution (25 mm, pH 7.4, 50% acetonitrile, v/v).
authors.affiliation: College of Chemistry & Chemical Engineering, Central South University.
authors.forename: Peng
authors.initials: P
authors.lastname: Hou
authors.forename: Song
authors.initials: S
authors.lastname: Chen
authors.forename: Kislon
authors.initials: K
authors.lastname: Voitchovsky
authors.forename: Xiangzhi
authors.initials: X
authors.lastname: Song
mesh_terms: D003124:Colorimetry; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D015394:Molecular Structure; D053644:Naphthalimides / Q000138:chemical synthesis / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013447:Sulfites / Q000737:chemistry*
chemical_list: D005456:Fluorescent Dyes; D053644:Naphthalimides; D013447:Sulfites
keywords: colorimetric; fluorescent probe; sulfite