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Homogeneous Tritylation of Cellulose in 1-Butyl-3-methylimidazolium Chloride

✍ Scribed by Tina Erdmenger; Claudia Haensch; Richard Hoogenboom; Ulrich S. Schubert

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
152 KB
Volume
7
Category
Article
ISSN
1616-5187

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✦ Synopsis

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 ^1^H NMR spectroscopy. A DS of around 1 was obtained after 3 h reaction time using a six fold excess of trityl chloride.

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