Sum-frequency generation spectroscopy of cinnamate modified cellulosic polymer at the air-water interface
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.
|Journal||J. Phys. Chem. B|
Backus, E.H.G, Abrakhi, S, Péralta, S, Fichet, O, & Cantin, S. (2012). Sum-frequency generation spectroscopy of cinnamate modified cellulosic polymer at the air-water interface. J. Phys. Chem. B, 116. doi:10.1021/jp301844b