title: A new selective colorimetric and fluorescent chemodosimeter for HSO4(-) based on hydrolysis of Schiff base.
abstract: Two new receptors 1 and 2 were prepared, and their chromogenic and fluorogenic behaviors toward various anions were investigated. Receptors 1 and 2 show exclusive response toward HSO4(-) ion and also distinguish HSO4(-) from other anions by different color changes in aqueous solution (CH3CN/H2O=4/1, v/v). Between them receptor 1 selectively exhibits a pronounced HSO4(-)-induced fluorescence enhancement. The detection limit for the HSO4(-) ion was determined as (0.24±0.03μM). Thus, the receptor 1 can be used as a colorimetric and fluorescent sensor for the determination of HSO4(-) ion. The sensing mechanism has been suggested to proceed via a hydrolysis process. The hydrolysis product has been isolated and further identified by (1)H NMR spectroscopy, ESI-MS analysis and X-ray diffraction.
authors.affiliation: Department of Applied Chemistry, Providence University, 200, Sec. 7, Taiwan Boulevard, Shalu Dist., Taichung City 43301, Taiwan.
authors.forename: Chi-Yung
authors.initials: CY
authors.lastname: Lin
authors.forename: Keh-Feng
authors.initials: KF
authors.lastname: Huang
authors.forename: Yao-Pin
authors.initials: YP
authors.lastname: Yen
mesh_terms: D003124:Colorimetry / Q000379:methods*; D005453:Fluorescence; D006868:Hydrolysis; D007202:Indicators and Reagents; D012545:Schiff Bases / Q000737:chemistry*; D012996:Solutions; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D013431:Sulfates / Q000737:chemistry*; D017186:Titrimetry
chemical_list: D007202:Indicators and Reagents; D012545:Schiff Bases; D012996:Solutions; D013431:Sulfates
keywords: Chromogenic sensor; Fluorescent sensor; Hydrogen sulfate anion; Hydrolysis