Journal
CARBOHYDRATE POLYMERS
Volume 82, Issue 2, Pages 370-375Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2010.04.087
Keywords
Cellulose oxidative degradation; FTIR; UV/vis; DFT
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Funding
- Academic Computer Centre Cyfronet in Krakow (Poland) [MNil/SGI2800/UJ/020/2004]
- Polish Ministra of Science and Higher Education [SPB K/PMN/000018]
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The oxidative route of cellulose degradation during artificial ageing of paper in humid air (RH 59%, 90 degrees C) has been followed by FTIR and UV/vis spectroscopic methods providing a vibrational pattern of carbonyl groups and electronic transitions of chromophores, respectively. Conjugated ketonic groups with vibrational modes around 1610 cm(-1) were correlated to the chromophores emerging in the range between 230 and 440 nm detected by UV/vis spectroscopy. The FTIR spectra of degraded cellulose were interpreted using quantum-chemical modelling based on the DFT method performed on the model molecule of cellopentose. Based on this carbonyl FTIR bands were assigned to specific vibrations. The UV/vis and FTIR correlations together with the theoretical charge distribution rationalized the possible mechanism of oxidative glycosidic bond cleavage. (C) 2010 Elsevier Ltd. All rights reserved.
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