Werner, T. and Huber, Ch. and Heinl, S. and Kollmannsberger, M. and Daub, Jörg and Wolfbeis, Otto S. (1997) Novel optical pH-sensor based on a boradiaza-indacene derivative. FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY, 359 (2). pp. 150-154. ISSN 0937-0633
Full text not available from this repository.Abstract
A pH-optode is described based on 1,3,5,7-tetramethyl-8-(4-dimethylamino)-4-difluorobora-3a,4a-diaza-(s)-indacene (1) immobilized in a hydrogel matrix. Its uncharged form is non-fluorescent, whereas the protonated form displays strong emission. The quenching of the emission can be mechanistically explained by a PET (photoinduced electron transfer) from the dimethylamino group to the fluorophore. The perpendicular configuration at the C(8)-aryl bond contributes to the efficiency of the on/off-switching behavior. Incorporation of the dye into a hydrogel matrix results in a transparent sensor membrane which can be used to measure the pH in the range of 1-3. The sensor shows high signal intensity, good reproducibility, and the response characteristic is stable over hours of operation even at low pH-values.
| Item Type: | Article |
|---|---|
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik Chemistry and Pharmacy > Institut für Organische Chemie > Alumni or Retired Professors > Prof. Dr. Jörg Daub |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 30 Mar 2023 05:29 |
| Last Modified: | 30 Mar 2023 05:29 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50602 |
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