Efficiency of porous silicon photosensitizer in the singlet oxygen-mediated oxidation of organic compounds

Loponov, Konstantin, Goller, Bernhard, Moskalenko, Andriy, Kovalev, Dmitry and Lapkin, Alexei 2010. Efficiency of porous silicon photosensitizer in the singlet oxygen-mediated oxidation of organic compounds. Journal of Photochemistry and Photobiology A: Chemistry 211 (1) , pp. 74-77. 10.1016/j.jphotochem.2010.02.005

Full text not available from this repository.

Abstract

The efficiency of singlet oxygen photosensitization by porous silicon is compared with that of a conventional dye photosensitizer tetraphenylporphine by means of singlet oxygen-mediated photooxidation of �-terpinene. Based on photoluminescence measurements it was concluded that the efficiency of porous silicon as a sensitizer is much lower than that of the conventional organic dye. The main reasons for this are the low quantum yield of long living photoinduced electronic excitations (excitones) confined in silicon nanocrystals and deactivation of singlet oxygen by H-terminated internal surface of porous silicon powder. Efficient quenching of excitons in porous silicon by 1,3-diphenylisobenzofuran via the direct energy transfer was demonstrated. This process is believed to be responsible for photobleaching of 1,3-diphenylisobenzofuran at its millimolar concentrations.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics Q Science > QD Chemistry
Uncontrolled Keywords:	Singlet oxygen ; Porous silicon ; Photochemistry
Publisher:	Elsevier
ISSN:	1010-6030
Last Modified:	23 Mar 2017 04:01
URI:	https://orca.cardiff.ac.uk/id/eprint/46070

Citation Data

Cited 5 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item