title: Ratiometric fluorescent probe for rapid detection of bisulfite through 1,4-addition reaction in aqueous solution.
abstract: A ratiometric fluorescent probe based on a positively charged benzo[e]indolium moiety for bisulfite is reported. The bisulfite underwent a 1,4-addition reaction with the C-4 atom in the ethylene group. This reaction resulted in a large emission wavelength shift (Δλ = 106 nm) and an observable fluorescent color change from orange to cyan. The reaction could be completed in 90 s in a PBS buffer solution and displayed high selectivity and sensitivity for bisulfite. A simple paper test strip system was developed to detect bisulfite rapidly. Probe 1 was used to detect bisulfite in real samples with good recovery.
authors.affiliation: School of Chemistry and Chemical Engineering, Taiyuan University of Technology , Taiyuan 030024, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Sun
authors.forename: Dong
authors.initials: D
authors.lastname: Zhao
authors.forename: Shanwei
authors.initials: S
authors.lastname: Fan
authors.forename: Lian
authors.initials: L
authors.lastname: Duan
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Li
mesh_terms: D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D005503:Food Additives / Q000032:analysis* / Q000737:chemistry; D015394:Molecular Structure; D013050:Spectrometry, Fluorescence; D013447:Sulfites / Q000032:analysis* / Q000737:chemistry
chemical_list: D005456:Fluorescent Dyes; D005503:Food Additives; D013447:Sulfites; C042345:hydrogen sulfite