Journal
CARBOHYDRATE RESEARCH
Volume 345, Issue 15, Pages 2201-2205Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carres.2010.07.036
Keywords
Ionic liquid; Cellulose; DFT; Hydrogen bond; Interaction
Funding
- National Natural Science Foundation of China [20773078, 20633060]
- Specialized Research Fund for the Doctoral Program of Higher Education [200804220009]
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The interactions of the cellulose molecule with several anions, including acetate, alkyl phosphate, tetrafluoroborate and hexafluorophosphate anions which are most commonly involved in the imidazolium ionic liquids (ILs), have been studied by performing density functional theory calculations. Based on calculated geometries, energies, IR characteristics, and electronic properties of the cellulose-anion complexes, it is found that the strength of interactions of anions with cellulose follows the order: acetate anion > alkyl phosphate anion > tetrafluoroborate anion > hexafluorophosphate anion, which is consistent with the experimentally observed solubility trend of cellulose in the corresponding imidazolium-based ILs. The present study may provide basic aids to some extent for understanding the dissolution behavior of cellulose in the imidazolium-based ILs. (C) 2010 Published by Elsevier Ltd.
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