title: Ratiometric determination of Hg2+ ions based on simple molecular motifs of pyrene and dioxaoctanediamide.
abstract: A new podand-type dioxaoctanediamide-based chemosensor having two pyrene moieties was prepared, and its fluoroionophoric behaviors toward transition-metal ions were investigated. Pyrene-appended dioxaoctanediamide 1 showed a selective fluorescence quenching toward Hg2+ ions over other transition-metal ions in an aqueous methanol solution. Unique responses in pyrene monomer and excimer emissions allowed selective ratiometric determination of Hg2+ ions in aqueous environments, and the detection limit was found to be 1.6 x 10(-6) M. [structure: see text]
authors.affiliation: Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea.
authors.forename: Jun Soo
authors.initials: JS
authors.lastname: Kim
authors.forename: Myung Gil
authors.initials: MG
authors.lastname: Choi
authors.forename: Ki Cheol
authors.initials: KC
authors.lastname: Song
authors.forename: Kyoung Tai
authors.initials: KT
authors.lastname: No
authors.forename: Sangdoo
authors.initials: S
authors.lastname: Ahn
authors.forename: Suk-Kyu
authors.initials: SK
authors.lastname: Chang
mesh_terms: D000577:Amides / Q000737:chemistry*; D001665:Binding Sites; D015374:Biosensing Techniques / Q000379:methods*; D002413:Cations, Divalent; D005456:Fluorescent Dyes / Q000138:chemical synthesis*; D008628:Mercury / Q000032:analysis* / Q000737:chemistry; D000432:Methanol / Q000737:chemistry; D009795:Octanes / Q000737:chemistry*; D011721:Pyrenes / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D014867:Water / Q000737:chemistry
chemical_list: D000577:Amides; D002413:Cations, Divalent; D005456:Fluorescent Dyes; D009795:Octanes; D011721:Pyrenes; C519625:dioxaoctanediamide; D014867:Water; C030984:pyrene; D008628:Mercury; D000432:Methanol