Lobnik, Aleksandra and Wolfbeis, Otto S. (2001) Probing the polarity of sol-gels and ormosils via the absorption of Nile Red. JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 20 (3). pp. 303-311. ISSN 0928-0707
Full text not available from this repository. (Request a copy)Abstract
Conventional sol-gels are rather hydrophilic. A more hydrophobic material is obtained preparing organically modified siloxanes (ormosils). The polarity-sensitive probe Nile Red (NR) was doped in various sol-gels to probe their micro-polarity. The experiments show that the NR is an excellent probe and sensitive to the polarity of its microenvironment. Spectroscopic studies reveal remarkable changes in the absorption band positions and intensities as a function of the polarity of the sol-gel, which depends on the different precursors used. Furthermore, sol aging, gelation and temporal stability as a function of different ormosils have been investigated.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SOLVATOCHROMIC DYE; FILMS; SENSORS; MICROENVIRONMENT; AMMONIA; characterization; polarity sensitive dyes; sol-gels; ormosils; absorption; stability |
| 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: | 14 Feb 2022 08:08 |
| Last Modified: | 14 Feb 2022 08:08 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41707 |
Actions (login required)
 |
View Item |
