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Biodegradable ionic liquids: Part I. Concept, preliminary targets and evaluation

AuthorsGathergood, Nicholas; García Ramón, María Teresa ; Scammells, Peter J.
KeywordsIonic liquids
3-methyl-1-(alkyloxycarbonylmethyl)imidazolium bromide
Issue Date4-Feb-2004
PublisherRoyal Society of Chemistry (UK)
CitationGreen Chemistry 6(3): 166-175 (2004)
AbstractThe design, preparation and evaluation of biodegradable ionic liquids containing ester or amide groups in the alkyl side chain are presented. Factors improving the biodegradation of surfactants were successfully applied to ionic liquids. These novel ionic liquids can be prepared from readily available starting materials in high yield. The introduction of a group susceptible to enzymatic hydrolysis greatly improves the biodegradation (OECD 301D Closed Bottle Test) compared with the commonly used dialkylimidazolium ionic liquids, bmimBF4 and bmimPF6. For the 3-methyl-1-(alkyloxycarbonylmethyl)imidazolium bromide series, the greatest biodegradation was observed when alkyl = butyl, pentyl, hexyl and octyl. The corresponding amide analogs proved to be poorly biodegradable.
Description10 pages, 3 figures, 1 scheme.-- Printed version published Mar 2004.
Publisher version (URL)http://dx.doi.org/10.1039/b315270g
Appears in Collections:(IQAC) Artículos
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