title: An intramolecular charge transfer (ICT) based chemosensor for silver ion using 4-methoxy-N-((thiophen-2-yl)methyl)benzenamine.
abstract: 4-Methoxy-N-((thiophen-2-yl)methyl)benzenamine was found to be a highly selective chemosensor for Ag(+) ion in methanol-water (1 : 1 v/v) mixture over other metal ions such as Na(+), K(+), Li(+), Cu(+), Ba(2+), Cd(2+), Co(2+), Cu(2+), Fe(2+), Hg(2+), Mn(2+), Ni(2+), Pb(2+) and Zn(2+) with a limit of detection (LOD) is 5.0 × 10(-6) mol L(-1). Upon binding to Ag(+) ion, a strong fluorescent enhancement is observed which is attributed to an increase in intramolecular charge transfer (ICT). The proposed mechanism is strongly supported by TD-DFT calculations.
authors.affiliation: School of Chemistry, Madurai Kamaraj University, Madurai-625021, Tamil Nadu, India.
authors.forename: Vairaperumal
authors.initials: V
authors.lastname: Tharmaraj
authors.forename: Selvaraj
authors.initials: S
authors.lastname: Devi
authors.forename: Kasi
authors.initials: K
authors.lastname: Pitchumani
mesh_terms: D005456:Fluorescent Dyes / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D008670:Metals / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D011789:Quantum Theory; D012834:Silver / Q000032:analysis*; D013050:Spectrometry, Fluorescence; D013876:Thiophenes / Q000138:chemical synthesis / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: C579048:4-methoxy-N-((thiophen-2-yl)methyl)benzenamine; D005456:Fluorescent Dyes; D007477:Ions; D008670:Metals; D013876:Thiophenes; D014867:Water; D012834:Silver; D000432:Methanol