Ratiometric determination of Hg2+ ions based on simple molecular motifs of pyrene and dioxaoctanediamide.
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]
Kim
Jun Soo
JS
Department of Chemistry, Chung-Ang University, Seoul 156-756, Korea.
Choi
Myung Gil
MG
Song
Ki Cheol
KC
No
Kyoung Tai
KT
Ahn
Sangdoo
S
Chang
Suk-Kyu
SK
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
D000577:Amides; D002413:Cations, Divalent; D005456:Fluorescent Dyes; D009795:Octanes; D011721:Pyrenes; C519625:dioxaoctanediamide; D014867:Water; C030984:pyrene; D008628:Mercury; D000432:Methanol