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Microwave-assisted Synthesis of 1-(perfluorohexyl)-3-methylimidazolium iodide

Published online by Cambridge University Press:  27 December 2019

James E. Knoop Open the ORCID record for James E. Knoop [Opens in a new window]  and
Jeffrey R. Alston Open the ORCID record for Jeffrey R. Alston [Opens in a new window]
James E. Knoop
Affiliation:
Joint School of Nanoscience and Nanoengineering, North Carolina Agricultural and Technical State University, Greensboro, NC, 27401, USA
Jeffrey R. Alston*
Affiliation:
Joint School of Nanoscience and Nanoengineering, North Carolina Agricultural and Technical State University, Greensboro, NC, 27401, USA
*
(Email: jralston1@ncat.edu)
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Abstract

A perfluorinated ionic liquid, 1-(perfluorohexyl)-3-methylimidazolium iodide, was synthesized via microwave reaction and compared to a non-fluorinated analog. Typically, the synthesis of fluorinated ionic liquids involves long reaction times and multiple steps. We have demonstrated a shortened synthesis and a more straightforward procedure, by using a microwave reactor for the microwave-assisted synthesis of 1-(perfluorohexyl)-3-methylimidazolium iodide. The addition of fluorinated alkyl chains on imidazolium ionic liquid cations increases the molecular free volume of the ionic liquid which is beneficial for increasing CO2 physisorption. Computational and experimental data shows an increased CO2 solubility and capacity for fluorinated ionic liquids. The perfluoroalkyl functionalized ionic liquid is characterized using 1H and 19F NMR spectroscopy, FTIR spectroscopy, and DSC. By DSC, a crystallization onset is near -31 °C and while the onset of the melting point between -30 and -17 °C.

Keywords

microwave heatingsustainabilitychemical synthesisnuclear magnetic resonance (NMR)carbon dioxide
Type
Articles
Information
MRS Advances , Volume 5 , Issue 27-28: Energy & Environment , 2020 , pp. 1449 - 1456
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Copyright
Copyright © Materials Research Society 2019

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