How the cation size impacts on the relaxational and diffusional dynamics of supercooled butylammonium-based ionic liquids: DPEBA–TFSI versus BTMA–TFSI
Author:
Münzner Philipp1, Gainaru Catalin2, Böhmer Roland1
Affiliation:
1. Fakultät Physik, Technische Universität Dortmund , 44221 Dortmund , Germany 2. Chemical Sciences Division, Oak Ridge National Laboratory , Oak Ridge , TN 37831 , USA
Abstract
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.
Publisher
Walter de Gruyter GmbH
Subject
Physical and Theoretical Chemistry
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