ANYL 112 |
| The aim of this work is to investigate optical and electrochemical properties of 1-Hydroxypyrene and ultimately develop a sensor for its detection. The proposed sensor combines three selectivity modes: partitioning into a polymeric film and electrochemical modulation of the observed optical signal. We have shown that 1-Hydroxypyrene absorbs and fluoresces in both acidic and basic aqueous solutions. Acid dissociation constants were obtained for both ground and excited states and are 9.3 and 3.1 respectively. Investigation of electrochemistry of 1-Hydroxypyrene on tin doped indium oxide electrode shows that 1-Hydroxypyrene is easily oxidized. Optical studies pyrenolate ion show that fluorescence of the compound is completely quenched upon electrochemical oxidation, thus allowing for electrochemical modulation of the optical signal. Also, pyrenolate ion successfully partitioned into a poly(vinyl pyridine) film, which allows for preconcentration of the analyte. Currently investigations are underway to elucidate optical and electrochemical behavior of preconcentrated 1-Hydroxypyrene in the film. |
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General Papers
7:00 PM-9:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster
Division of Analytical Chemistry |