title: A new Schiff base based on vanillin and naphthalimide as a fluorescent probe for Ag+ in aqueous solution.
abstract: A new Schiff base based on vanillin and naphthalimide was designed and synthesized as fluorescent probe. The probe showed high selectivity for Ag(+) over other metal ions such as Pb(2+), Na(+), K(+), Cd(2+), Ba(2+), Cr(3+), Zn(2+), Cu(2+), Ni(2+), Ca(2+), Al(3+) and Mg(2+) in aqueous solution. A new fluorescence emission was observed at 682 nm in the presence of Ag(+) ion. The fluorescence intensity quenched with increasing the concentration of Ag(+) at 682 nm. The method of job's plot confirmed the 1:2 complex between Ag(+) and probe, and the mechanism was proposed.
authors.affiliation: Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan, PR China. zhouyanmei@henu.edu.cn
authors.forename: Yanmei
authors.initials: Y
authors.lastname: Zhou
authors.forename: Hua
authors.initials: H
authors.lastname: Zhou
authors.forename: Tongsen
authors.initials: T
authors.lastname: Ma
authors.forename: Junli
authors.initials: J
authors.lastname: Zhang
authors.forename: Jingyang
authors.initials: J
authors.lastname: Niu
mesh_terms: D000042:Absorption; D001547:Benzaldehydes / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D008670:Metals / Q000737:chemistry; D053644:Naphthalimides / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry*; D012834:Silver / Q000032:analysis*; D012996:Solutions; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet; D014867:Water / Q000737:chemistry*
chemical_list: D001547:Benzaldehydes; D005456:Fluorescent Dyes; D008670:Metals; D053644:Naphthalimides; D012545:Schiff Bases; D012996:Solutions; D012997:Solvents; D014867:Water; D012834:Silver; C100058:vanillin