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Issue 9, 2020
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New biobased-zwitterionic ionic liquids: efficiency and biocompatibility for the development of sustainable biorefinery processes

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Abstract

A new family of biobased-zwitterionic ionic liquids (ZILs) have been synthesized starting from the renewable resource L-histidine natural amino acid and varying the lengths of the alkyl chains. These ZIL derivatives were firstly studied for their biocompatibility with different microorganisms including bacteria, molds and yeast. The obtained MIC values indicated that all the microorganisms were 5 to 25 times more tolerant to ZIL derivatives than the robust 1-ethyl-3-methylimidazolium acetate [C2mim][OAc] used as a reference. Modeling studies also revealed that the presence of the cation and the anion on the same skeleton together with the length of the N-alkyl chain would govern the biocompatibility of these neoteric solvents. Among the different synthesized ZILs, the N,N′-diethyl derivative has been demonstrated to be a suitable eco-alternative to the classically used [C2mim][OAc] for efficient pretreatment of harwood sawdust leading to a significant improvement of enzymatic saccharification. In addition, with up to a 5% w/v concentration in the culture medium, ZILs did not induce deleterious effects on fermentative yeast growth nor ethanol production.

Graphical abstract: New biobased-zwitterionic ionic liquids: efficiency and biocompatibility for the development of sustainable biorefinery processes

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Article information


Submitted
20 Mar 2020
Accepted
17 Apr 2020
First published
17 Apr 2020

Green Chem., 2020,22, 2935-2946
Article type
Paper

New biobased-zwitterionic ionic liquids: efficiency and biocompatibility for the development of sustainable biorefinery processes

G. Huet, M. Araya-Farias, R. Alayoubi, S. Laclef, B. Bouvier, I. Gosselin, C. Cézard, R. Roulard, M. Courty, C. Hadad, E. Husson, C. Sarazin and A. Nguyen Van Nhien, Green Chem., 2020, 22, 2935
DOI: 10.1039/D0GC01002B

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