title: A highly selective turn-on fluorescent chemodosimeter for Cu(2+) through a Cu (2+)-promoted redox reaction.
abstract: A highly sensitive and selective photoinduced electron transfer (PET) fluorescence chemodosimeter L for Cu(2+) detection has been synthesized and characterized. This PET chemosensor composed of a butano-tethered electron-riched phenothiazine (Ptz) donor and acridine orange (AO) signalling element. Based on the Cu(2+)-promoted oxidation of Ptz donor, the signalling element AO showed a unique fluorescent turn-on properties, which led to a highly Cu(2+)-specific fluorescent chemodosimeter. A fluorescent enhancement factor over 8-fold can be reached by fully blocking the PET channel with a detection limit down to the 10(-7) M range. Meanwhile, the reversibility of the chemodosimeter L can be realized by the addition of L-cysteine.
authors.affiliation: School of Materials Science & Engineering, Institute of Information Functional Materials& Devices, Harbin Institute of Technology, Harbin, 150001, China.
authors.forename: Lijuan
authors.initials: L
authors.lastname: Liang
authors.forename: Liancheng
authors.initials: L
authors.lastname: Zhao
authors.forename: Xianshun
authors.initials: X
authors.lastname: Zeng
mesh_terms: D000165:Acridine Orange / Q000737:chemistry*; D015374:Biosensing Techniques; D004396:Coloring Agents / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D004579:Electron Transport; D004583:Electrons; D005456:Fluorescent Dyes / Q000737:chemistry*; D008027:Light; D057230:Limit of Detection; D015394:Molecular Structure; D010084:Oxidation-Reduction; D010640:Phenothiazines / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
chemical_list: D004396:Coloring Agents; D005456:Fluorescent Dyes; D010640:Phenothiazines; D003300:Copper; D000165:Acridine Orange; C031637:phenothiazine