Shin, Ik-Soo and Hirsch, Thomas and Ehrl, Benno and Jang, Dong-Hak and Wolfbeis, Otto S. and Hong, Jong-In (2012) Efficient Fluorescence "Turn-On" Sensing of Dissolved Oxygen by Electrochemical Switching. ANALYTICAL CHEMISTRY, 84 (21). pp. 9163-9168. ISSN 0003-2700, 1520-6882
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We report on a novel method for sensing oxygen that is based on the use of a perylene diimide dye (1) which is electrochemically reduced to its nonfluorescent dianion form (1(2-)) In the presence of oxygen, the dianion is oxidized to its initial form via an electron-transfer reaction with oxygen upon which fluorescence is recovered. As a result, the fluorescence intensity of the dianion solution increases upon the addition of oxygen gas. Results demonstrate that high sensitivity is obtained, and the emission intensity shows a linear correlation with oxygen content (0.0-4.0% v/v) at ambient barometric pressure. In addition, using electrochemical reduction, oxygen determination becomes regenerative, and no significant degradation is observed over several turnovers. The limit of detection is 0.4% oxygen in argon gas.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PERYLENE TETRACARBOXYLIC DIIMIDE; OPTICAL CHEMICAL SENSORS; HIGH-STABILITY; DYE; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Antje J. Bäumner, formerly Prof. Wolfbeis) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 May 2020 12:38 |
| Last Modified: | 04 May 2020 12:38 |
| URI: | https://pred.uni-regensburg.de/id/eprint/17815 |
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