Homogeneous Tritylation of Cellulose in 1-Butyl-3-methylimidazolium Chloride
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Erdmenger, Tina; Haensch, Claudia; Hoogenboom, Richard; Schubert, Ulrich S.
- Abstract:
- 1-Alkyl-3-methylimidazolium-based ionic liquids, having chloride as a counter ion, were
studied for cellulose solubility; and the influence of different alkyl chain lengths was also
investigated. The alkyl chain length was incrementally varied from ethyl to decyl to determine
structure-dissolution properties; a distinct odd-even effect was observed for short chain
lengths. In addition, the tritylation of cellulose was performed in 1-butyl-3-methylimidazolium
chloride using pyridine as base.
The influences of reaction time and the ratio of
trityl chloride per cellulose monomer unit on the
degree of substitution were investigated in detail
by elemental analysis and 1H NMR spectroscopy.
A DS of around 1 was obtained after 3 h reaction
time using a six fold excess of trityl chloride.
- Year:
- 2007
- Type of Publication:
- Article
- Journal:
- Macromolecular Bioscience
- Volume:
- 7
- Pages:
- 440 - 445