Journal Article Dynamical study of the water penetration process into a cellulose acetate film studied by coherent anti-Stokes Raman scattering (CARS) microspectroscopy

Fujisawa, Rie  ,  Ohno, Tomoya  ,  Kaneyasu, Junya F.  ,  Leproux, Philippe  ,  Couderc, Vincent  ,  Kita, Hiroshi  ,  Kano, Hideaki

655-656pp.86 - 90 , 2016-07 , Elsevier B.V.
ISSN:0009-2614
NCID:AA00602122
Description
The penetration process of water into a cellulose acetate film was traced in real time by coherent anti-Stokes Raman scattering (CARS) microspectroscopy. The Cdouble bond; length as m-dashO stretch mode was red-shifted due to hydrogen-bond formation. We also found that two Raman bands at 1605 cm−1 and 1665 cm−1 emerged only in the early stage of the water penetration process. Based on the combined analysis of the experimental and computational studies, these bands at 1605 cm−1 and 1665 cm−1 were assigned as the OH bend mode due to hydrogen-bonded penetrated water and hydrogen-bonded OH groups in pyranose rings, respectively.
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