title: A fluorescent probe for both pH and Zn2+ based on 2-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenol.
abstract: A sensitive fluorescent probe 2-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenol (HBIZ) for pH and Zn2+ has been developed. Great changes have taken place in the UV-vis absorption and fluorescence spectra for HBIZ upon increasing pH of its aqueous solution, acting as a pH-induced emission "off-on-off" switch with large enhancement factors of ∼290 and ∼75 over the pH range of 1.00-5.40 and 5.20-10.40. A over 100-fold fluorescence enhancement was also observed after complexation of HBIZ to Zn2+ in N,N-dimethylformamide.
authors.affiliation: College of Chemistry, Beijing Normal University, Beijing 100875, China.
authors.forename: Chuan-Chuan
authors.initials: CC
authors.lastname: Ju
authors.forename: Hong-Ju
authors.initials: HJ
authors.lastname: Yin
authors.forename: Chui-Li
authors.initials: CL
authors.lastname: Yuan
authors.forename: Ke-Zhi
authors.initials: KZ
authors.lastname: Wang
mesh_terms: D004126:Dimethylformamide; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D005559:Formamides / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007093:Imidazoles / Q000737:chemistry*; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D015032:Zinc / Q000032:analysis*
chemical_list: C568180:2-(1-phenyl-1H-benzo(d)imidazol-2-yl)phenol; D005456:Fluorescent Dyes; D005559:Formamides; D007093:Imidazoles; D010636:Phenols; D004126:Dimethylformamide; D015032:Zinc