Toxicity of various anions associated with methoxyethyl methyl imidazolium-based ionic liquids on Clostridium sp |
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| Authors: | Wang Hao Malhotra Sanjay V Francis Arokiasamy J |
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| Institution: | a Department of Chemistry and Environmental Sciences, New Jersey Institute of Technology, Newark, NJ 07104, United States;b Environmental Sciences Department, Brookhaven National Laboratory, Upton, NY 11953, United States |
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| 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. |
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| Keywords: | Ionic liquids Anions Toxicity Bacteria Clostridium sp |
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