This paper is part of a special issue dedicated to Professor J. C. (Tito) Scaiano on the occasion of his 60th birthday.
Phototoxic Phytoalexins. Processes that Compete with the Photosensitized Production of Singlet Oxygen by 9-Phenylphenalenones†
Article first published online: 30 APR 2007
Photochemistry and Photobiology
Volume 82, Issue 1, pages 95–103, January 2006
How to Cite
Flors, C., Ogilby, P. R., Luis, J. G., Grillo, T. A., Izquierdo, L. R., Gentili, P.-L., Bussotti, L. and Nonell, S. (2006), Phototoxic Phytoalexins. Processes that Compete with the Photosensitized Production of Singlet Oxygen by 9-Phenylphenalenones. Photochemistry and Photobiology, 82: 95–103. doi: 10.1562/2005-04-07-RA-479
Current address: Department of Chemistry, Katholicke Universitát Leuven, Heverlee, Belgium.
- Issue published online: 30 APR 2007
- Article first published online: 30 APR 2007
- Received 7 April 2005; accepted 28 June 2005; published online 19 July 2005
Experiments were performed to elucidate the excited-state behavior of 9-phenylphenalenones, which are phototoxic plant secondary metabolites involved in mechanisms of light-mediated plant defense. Using a combination of time-resolved and steady-state UV/visible spectroscopies, time-resolved IR absorption spectroscopy, time-resolved singlet oxygen phosphorescence measurements and cyclic voltammetry, we provide evidence of an intramolecular charge-transfer process in the excited singlet and the triplet states of 9-phenylphenalenones that modulates the photosensitized production of singlet oxygen.