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Visible light switching of a BF2-coordinated azo compound.
- Source :
-
Journal of the American Chemical Society [J Am Chem Soc] 2012 Sep 19; Vol. 134 (37), pp. 15221-4. Date of Electronic Publication: 2012 Sep 10. - Publication Year :
- 2012
-
Abstract
- Here we report the synthesis and characterization of a BF(2)-azo complex that can be induced to isomerize without the need of deleterious UV light. The complexation of the azo group with BF(2), coupled with the extended conjugation of the N═N π-electrons, increases the energy of the n-π* transitions and introduces new π-nonbonding (π(nb)) to π* transitions that dominate the visible region. The well separated π(nb)-π* transitions of the trans and cis isomers enable the efficient switching of the system by using only visible light. The complexation also leads to a slow cis → trans thermal relaxation rate (t(1/2) = 12.5 h). Theoretical calculations indicate that the absorption bands in the visible range can be tuned using different Lewis acids, opening the way to a conceptually new strategy for the manipulation of azo compounds using only visible light.
Details
- Language :
- English
- ISSN :
- 1520-5126
- Volume :
- 134
- Issue :
- 37
- Database :
- MEDLINE
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 22954379
- Full Text :
- https://doi.org/10.1021/ja306030d