期刊
RESEARCH
卷 2022, 期 -, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.34133/2022/9853529
关键词
-
资金
- National Key Research and Development Program of China [2017YFA0403103]
- Youth Innovation Promotion Asso-ciation of the Chinese Academy of Sciences [2018040]
- National Natural Science Foundation of China [52173292, 51773210]
A revolutionary potential in polysaccharide chemistry industries is demonstrated by a super-rapid and highly efficient modification strategy using imidazolium-based ionic liquids and click esterification method, which allows for rapid and efficient modification of various polysaccharides under catalyst-free conditions.
It is extremely difficult to achieve a rapid and efficient modification of natural polysaccharides, due to the intrinsic strong hydrogen bonding networks and the slow mass transfer process during the reaction process. Herein, we found a fascinating anion-tunnel transmission phenomenon in the imidazolium-based ionic liquids with carboxylate anions. A novel click esterification of natural polysaccharides thus was demonstrated under a catalyst-free condition within a very short reaction time of 15 min at 0-80 degrees C. Such a super-rapid and highly efficient modification strategy is available for various polysaccharides (cellulose, starch, inulin, pullulan, dextran, and xylan), different esterification reactions (acetification, propionation, benzoylation, and cyclohexyl formylation), and high concentrations, claiming a revolutionary potential in polysaccharide chemistry industries.
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