title: An easily Prepared Fluorescent pH Probe Based on Dansyl.
abstract: A novel fluorescent pH probe from dansyl chloride and thiosemicarbazide was easily prepared and fully characterized by (1)H NMR, (13)C NMR, LC-MS, Infrared spectra and elemental analysis. The probe exhibited high selectivity and sensitivity to H(+) with a pK a value of 4.98. The fluorescence intensity at 510 nm quenched 99.5 % when the pH dropped from 10.88 to 1.98. In addition, the dansyl-based probe could respond quickly and reversibly to the pH variation and various common metal ions showed negligible interference. The recognition could be ascribed to the intramolecular charge transfer caused by the protonation of the nitrogen in the dimethylamino group.
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China.|Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou, Jiangsu, 215123, China.
authors.forename: Chunming
authors.initials: C
authors.lastname: Sha
authors.affiliation: College of Pre-clinical Medical and Biological Science, Soochow University, Suzhou, 215123, China.
authors.forename: Yuhua
authors.initials: Y
authors.lastname: Chen
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China.|Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou, Jiangsu, 215123, China.
authors.forename: Yufen
authors.initials: Y
authors.lastname: Chen
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, 215123, China. xdm.sd@163.com.|Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou, Jiangsu, 215123, China. xdm.sd@163.com.
authors.forename: Dongmei
authors.initials: D
authors.lastname: Xu
keywords: Dansyl; Fluorescent probe; Fluorescent sensor; Thiosemicarbazide; pH