The photobehavior of five photochromic dipyrrolyl-perfluoro-cyclopentenes was studied by steady state and time-resolved absorption spectroscopy. The quantum yields of the UV-photoinduced ring-closing reaction (coloration) and the visible-stimulated cycloreversion reaction (bleaching) were measured. Kinetic and thermodynamic parameters of thermal bleaching were also determined. Nanosecond time-resolved experiments showed formation of a transient, which was not a precursor of the reaction photoproduct. This transient was tentatively assigned to a radical cation formed by direct photoionization through a short-lived triplet state. The nature of the transient species was supported by photoinduced electron transfer to electron acceptors.
How to translate text using browser tools
1 September 2006
Photoinduced Processes in Dipyrrolyl-Perfluoro-Cyclopentenes
Fausto Ortica,
Paola Smimmo,
Ugo Mazzucato,
Gianna Favaro,
Arnault Heynderickx,
Corinne Moustrou,
André Samat
ACCESS THE FULL ARTICLE
It is not available for individual sale.
This article is only available to subscribers.
It is not available for individual sale.
It is not available for individual sale.
Photochemistry and Photobiology
Vol. 82 • No. 5
September 2006
Vol. 82 • No. 5
September 2006