How the cation size impacts on the relaxational and diffusional dynamics of supercooled butylammonium-based ionic liquids: DPEBA-TFSI versus BTMA-TFSI

Philipp Münzner; Catalin Gainaru; Roland Böhmer

doi:10.1515/zpch-2021-3138

How the cation size impacts on the relaxational and diffusional dynamics of supercooled butylammonium-based ionic liquids: DPEBA-TFSI versus BTMA-TFSI

Philipp Münzner, Catalin Gainaru, Roland Böhmer

Soft Materials and Membranes

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Li-bis(trifluoromethylsulfonyl)imide based ionic liquids with either butyl-trimethylammonium or N,N-dimethyl-N-(2-(propionyloxy)-ethyl)butan-1-ammonium as the anion were studied using proton and fluorine relaxometry as well as using field-gradient diffusometry to gain separate access to cation and anion dynamics in these compounds. The transport parameters obtained for these ionic liquids are compared with the estimates based on the conductivity data from literature and from the present work. The impact of cation size on correlation effects, the latter parameterized in terms of various Haven ratios, is mapped out.

Original language	English
Pages (from-to)	923-937
Number of pages	15
Journal	Zeitschrift fur Physikalische Chemie
Volume	236
Issue number	6-8
DOIs	https://doi.org/10.1515/zpch-2021-3138
State	Published - Jun 1 2022

Funding

Research funding: We thank the Deutsche Forschungsgemeinschaft for funding this work under project No. 396060266.

Keywords

field-gradient diffusometry
ionic liquids
nuclear magnetic resonance
spin-lattice relaxation

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10.1515/zpch-2021-3138

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How the cation size impacts on the relaxational and diffusional dynamics of supercooled butylammonium-based ionic liquids: DPEBA-TFSI versus BTMA-TFSI

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