title: Photocyclization of trans-1-(1'-naphthyl)-2-(3-hydroxyphenyl)ethene: evidence for adiabatic 1trans*-->1cis* photoisomerization.
abstract: The photochemistry of trans- and cis-1-(1'-naphthyl)-2-(3-hydroxyphenyl)ethene in cyclohexane and acetonitrile was examined. In cyclohexane fluorescence is the main deactivation channel for the 1trans* isomer while photocyclization is the main reaction of the 1cis* isomer. The weighty formation of hydroxychrysene following one photon absorption by the trans isomer furnished evidence of an adiabatic 1trans*-->1cis* isomerization. The photoreactivity data in acetonitrile indicated the influence of solvent polarity on the shape of the excited state surface.
authors.affiliation: Istituto per la Sintesi Organica e la Fotoreattivita(ISOF) del CNR, via Piero Gobetti 101, 40129 Bologna, Italy.
authors.forename: Pietro
authors.initials: P
authors.lastname: Bortolus
authors.forename: Guido
authors.initials: G
authors.lastname: Galiazzo
authors.forename: Giorgio
authors.initials: G
authors.lastname: Gennari
authors.forename: Ilse
authors.initials: I
authors.lastname: Manet
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Marconi
authors.forename: Sandra
authors.initials: S
authors.lastname: Monti