title: Turn-on fluorescent chemosensor based on an amino acid for Pb(II) and Hg(II) ions in aqueous solutions and role of tryptophan for sensing.
abstract: This communication presents a fluorescent chemosensor for detecting Pb(II) and Hg(II) in aqueous solutions. The sensor showed a turn-on response to Pb(II) by an enhancement of emission intensity at 380 nm and to Hg(II) by an enhancement of emission intensities at 380 and 475 nm. We have first characterized a unique function of tryptophan as a ligand as well as a quencher for recognition and fluorescent change by a metal binding event.
authors.affiliation: Bioorganic Chemistry Laboratory, Department of Chemistry, Inha University, Yunghyun-dong, Nam-gu, Incheon, 402-751, Republic of Korea.
authors.forename: Lok Nath
authors.initials: LN
authors.lastname: Neupane
authors.forename: Joo-Young
authors.initials: JY
authors.lastname: Park
authors.forename: Ju Hun
authors.initials: JH
authors.lastname: Park
authors.forename: Keun-Hyeung
authors.initials: KH
authors.lastname: Lee
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry; D007854:Lead / Q000032:analysis*; D008628:Mercury / Q000032:analysis*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D012996:Solutions / Q000737:chemistry; D014364:Tryptophan / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D000596:Amino Acids; D005456:Fluorescent Dyes; D012996:Solutions; D014867:Water; D007854:Lead; D014364:Tryptophan; D008628:Mercury