title: Supramolecular control of [2 + 2] photodimerization via hydrogen bonding.
abstract: The use of supramolecular catalysis to control the photoinduced dimerization of styrene, cinnamate, and stilbene chromophores is reported. The strategy employs the formation of a 2:1 supramolecular assembly in the presence of 5,5-dihexylbarbituric acid (DHB). A 3- to 10-fold increase in dimerization efficiency is observed in its presence, concomitant with accrued selectivity for the syn photodimers. The origin of the regioselectivity in the presence of DHB is discussed in terms of topochemical control within the supramolecular architecture.
authors.affiliation: Groupe de Chimie Supramoléculaire, Biomimétisme et Nanosciences, Université Bordeaux I, LCOO CNRS UMR 5802, 33405 Talence, France.
authors.forename: Vincent
authors.initials: V
authors.lastname: Darcos
authors.forename: Kirsten
authors.initials: K
authors.lastname: Griffith
authors.forename: Xavier
authors.initials: X
authors.lastname: Sallenave
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Desvergne
authors.forename: Carine
authors.initials: C
authors.lastname: Guyard-Duhayon
authors.forename: Bernold
authors.initials: B
authors.lastname: Hasenknopf
authors.forename: Dario M
authors.initials: DM
authors.lastname: Bassani