title: A fluorescent chemosensor for copper(II) based on a carboxylic acid-functionalized tris(2,2'-bipyridine)-ruthenium(II) complex.
abstract: In this research, bis(2,2'-bipyridine)(4-methyl-2,2'-bipyridine-4'-carboxylic acid)ruthenium(II).2PF(6)- complex (1), was first used as a fluorescent chemosensor to recognize Cu(II) in EtOH/H(2)O (1:1, v/v) solution. The response of the sensor is based on the fluorescence quenching of complex 1 by binding with Cu(II). The analytical performance characteristics of the proposed Cu(II)-sensitive chemosensor were investigated. The sensor can be applied to the quantification of Cu(II) with a linear range covering from 5.0 x 10(-8) to 1.0 x 10(-4) M and a detection limit of 4.2 x 10(-8) M. The experiment results show that the response behavior of 1 to Cu(II) is pH independent in medium condition (pH 4.0 - 8.0), and show excellent selectivity for Cu(II) over other transition metal cations.
authors.affiliation: College of Chemistry and Chemical Engineering, Central South University, Changsha, P.R. China.
authors.forename: Chun-Lian
authors.initials: CL
authors.lastname: He
authors.forename: Feng-Lian
authors.initials: FL
authors.lastname: Ren
authors.forename: Xiao-Bing
authors.initials: XB
authors.lastname: Zhang
authors.forename: Yan-Yan
authors.initials: YY
authors.lastname: Dong
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
mesh_terms: D015082:2,2'-Dipyridyl; D002264:Carboxylic Acids; D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D017975:Ruthenium Compounds
chemical_list: D002264:Carboxylic Acids; D005456:Fluorescent Dyes; D017975:Ruthenium Compounds; D015082:2,2'-Dipyridyl; D003300:Copper