Toxicity of various anions associated with methoxyethyl methyl imidazolium-based ionic liquids on Clostridium sp.

Document Type

Article

Publication Date

1-1-2011

Abstract

We investigated the effects on the growth of the anaerobic bacterium, Clostridium sp., of the ionic liquid, 1-methoxyethyl-3-methyl imidazolium [MOEMIM]+, derived from imidazolium cation and paired with one of a variety of counter-ions, viz., tetrafluoroborate [BF4]-, hexafluorophosphate [PF6]-, trifluoroacetate [CF3COO]-, bis(trifluoromethane)sulfonamide [Tf2N]-, methane sulfonate [OMS], and 1-butyl-3-methyl imidazolium tetrafluoroborate [BMIM][BF4]. These anions, in association with [MOEMIM]+ lowered the growth rate of the bacterium, showing the following trend: [Tf2N]-≧[PF6]->[BF4]->[CF3COO]->[OMS]-. Anions incorporating fluorine were more toxic than those without it, and their toxicity rose with an increase in the number of fluorine atoms. Also, [MOEMIM]+ [BF4]- was less toxic than [BMIM]+ [BF4]-, probably due to the presence of a methoxyethyl functional group integrated in the cation side chain. © 2010.

Identifier

79951723914 (Scopus)

Publication Title

Chemosphere

External Full Text Location

https://doi.org/10.1016/j.chemosphere.2010.11.049

ISSN

00456535

PubMed ID

21159360

First Page

1597

Last Page

1603

Issue

11

Volume

82

Grant

DE-AC02-98CH10886

Fund Ref

U.S. Department of Energy

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