title: Photoinduced electron transfer in ionic liquids: use of 2,4,6-triphenylthiapyrylium as a photosensitizer probe.
abstract: The photochemistry of 2,4,6-triphenylthiapyrylium, TPTP+, in an ionic liquid, bmim-PF6, and in zeolite Y has been investigated and compared. Fluorescence spectroscopy was used to characterize the singlet excited state and to demonstrate singlet quenching by dicyclopentadiene, DCP, as an electron donor. Time-resolved laser spectroscopy documents generation of the triplet excited state, 3TPTP+, and reduction by DCP, generating the corresponding radical, TPTP*, and radical ion, DCP+*. The highly polar media stabilize the organic intermediates, causing them to be long lived.
authors.affiliation: Departamento de Quìmica, Instituto de Tecnologìa CSIC-UPV, Universidad Politécnica de Valencia, Avda de los Naranjos s/n, 46022 Valencia, Spain.
authors.forename: Séverine
authors.initials: S
authors.lastname: Marquis
authors.forename: Belén
authors.initials: B
authors.lastname: Ferrer
authors.forename: Mercedes
authors.initials: M
authors.lastname: Alvaro
authors.forename: Hermenegildo
authors.initials: H
authors.lastname: García
authors.forename: Heinz D
authors.initials: HD
authors.lastname: Roth