| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1496101 | Optical Materials | 2009 | 8 Pages |
Abstract
A series of hydroxy and carboxy group containing azobenzene compounds were synthesized and investigated by UV-vis and fluorescence spectroscopy. It could be shown that the ambient medium exerted a strong influence on the absorption behavior and the trans-cis isomerization behavior of the azo compounds. Especially in the case of hydroxy group functionalized azobenzenes, deprotonation with NaOH or a polymeric base changed the spectral behavior of the compounds remarkably. A strong bathochromic shift of the dyes' longest wavelength absorption band was observed. Furthermore, the influence of different solvents and different polymeric matrices on the trans-cis isomerization behavior of the azobenzenes was investigated. The results are discussed in terms of utilization of the azo dyes as probe molecules for interactions in polymer blends.
Keywords
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Ulrich Oertel, Hasan Mart, Hartmut Komber, Frank Böhme,