title: Sum-frequency generation spectroscopy of cinnamate modified cellulosic polymer at the air-water interface.
abstract: Monolayers of a cellulosic polymer bearing cinnamate groups were characterized at the air-water interface by combining isotherm measurements, Brewster angle microscopy, and infrared-visible sum-frequency generation (SFG) spectroscopy. This spectroscopic technique was used to detect the photochemical behavior of the cinnamate groups upon UV photoirradiation of the monolayers. From the disappearance of the C═C mode and the absence of a change in the C═O mode, it could be concluded that isomerization is the dominant photoreaction for a monolayer of this polymer. This conclusion was corroborated by a comparison of the spectra of the monolayer after irradiation with spectra measured for monolayers spread from preirradiated solutions, for which it is known that isomerization is the main process.
authors.affiliation: FOM Institute AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
authors.forename: Ellen H G
authors.initials: EH
authors.lastname: Backus
authors.forename: Sanae
authors.initials: S
authors.lastname: Abrakhi
authors.forename: Sébastien
authors.initials: S
authors.lastname: Péralta
authors.forename: Dominique
authors.initials: D
authors.lastname: Teyssié
authors.forename: Odile
authors.initials: O
authors.lastname: Fichet
authors.forename: Sophie
authors.initials: S
authors.lastname: Cantin