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Interactions of Ionic Liquids with Polysaccharides 1. Unexpected Acetylation of Cellulose with 1‐Ethyl‐3‐methylimidazolium Acetate
Author(s) -
Köhler Sarah,
Liebert Tim,
Schöbitz Michael,
Schaller Jens,
Meister Frank,
Günther Wolfgang,
Heinze Thomas
Publication year - 2007
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200700529
Subject(s) - acetic anhydride , ionic liquid , acetic acid , cellulose , cellulose acetate , chemistry , chloride , organic chemistry , carboxylic acid , ethyl acetate , chemical modification , polymer chemistry , catalysis
The homogeneous conversion of cellulose in the ionic liquid 1‐ethyl‐3‐methylimidazolium acetate with 2‐furoyl chloride, p ‐toluenesulfonyl chloride, and triphenylmethyl chloride yields surprisingly pure cellulose acetate samples in any case. From NMR spectroscopic studies, it may be concluded that during the homogeneous functionalization reactive intermediates including furane‐2‐carboxylic acid/acetic acid anhydride and acetic acid triphenylmethyl ester are formed leading to the cellulose acetates with DS values in the range from 0.55 to 1.86.