Abstract
The effects of complexed metal ions on trans-cis photoisomerization reactions of two azobenzene compounds having a crown ether ring, 1a (small ring) and 1b (large ring) were investigated. The photoisomerization of 2,2′-dimethoxyazobenzene (2) was compared as a control. Anomalous increase in the quantum yields of the photoisomerization of 1a and 1b were observed by complexation with alkaline earth metal ions in both cases of photo irradiation at n→π* and π→π* absorption bands, except for some cases. These increase was attributed to the interaction between coordinated metal ions and oxygen atoms on 2,2′-position and/or nitrogen atoms of the azobenzene moiety. The dependence of the quantum yields on the ring size of the crown ether was also discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 7736-7743 |
| Number of pages | 8 |
| Journal | Journal of Physical Chemistry B |
| Volume | 101 |
| Issue number | 39 |
| Publication status | Published - 1997 Sept 25 |
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Surfaces, Coatings and Films
- Materials Chemistry