Research Data Leeds Repository

Citation

Ries, Michael (2018) Data associated with 'Microscopic and macroscopic properties of carbohydrate solutions in the ionic liquid 1-ethyl-3-methyl-imidazolium acetate'. University of Leeds. [Dataset] https://doi.org/10.5518/369

Dataset description

Solutions of glucose, cellobiose and microcrystalline cellulose in the ionic liquid 1-ethyl-3-methyl-imidazolium acetate ([C2mim][OAc]) have been examined using low field (20 MHz) NMR relaxometry and rheology. The spin-lattice (T1) and spin-spin (T2) relaxation times have been determined from 30 °C to 70 °C inclusive for a range of concentrations (0 to 15 wt %) of each carbohydrate in [C2mim][OAc]. The zero shear rate viscosities for the same samples across the same temperature range were studied. The viscosity, NMR relaxometry and previously published diffusion data were analysed all together through Debye-Stokes-Einstein equations. Microscopically these systems behave as an “ideal mixture” of free ions and ions associated with the carbohydrate molecules. The molar ratio of carbohydrate OH groups to ionic liquid molecules, a, is the key parameter in determining the NMR relaxometry and hence the local microscopic environment of the ions. NMR relaxometry data are found to follow an Arrhenius type behavior and the difference in rotational activation energy between free and associated ions is determined at 6.2 ±0.5 kJ/mol.

Subjects:	F000 - Physical sciences > F300 - Physics
Divisions:	Faculty of Engineering and Physical Sciences > School of Physics and Astronomy
Related resources:	Location Type https://www.doi.org/10.1021/acs.jpcb.8b06939 Publication https://eprints.whiterose.ac.uk/137125/ Publication
License:	Creative Commons Attribution 4.0 International (CC BY 4.0)
Date deposited:	24 Aug 2018 08:51
URI:	https://archive.researchdata.leeds.ac.uk/id/eprint/412
Additional details Additional details Creators or authors: Creators ORCID Other ID Email Primary affiliation Primary affiliation ID Primary affiliation ID type Secondary affiliation Secondary affiliation ID Secondary affiliation ID type Ries, Michael https://orcid.org/0000-0002-8050-3200 University of Leeds https://ror.org/024mrxd33 ror Type of data: Dataset Research funders: EPSRC, Royal Society Grant numbers: EP/I501495/1, IF120090 Publication date: 2018 Resource language: English Metadata language: English Research project title: Microscopic and macroscopic properties of carbohydrate solutions in the ionic liquid 1-ethyl-3-methyl-imidazolium acetate Publisher: University of Leeds Contact email: m.e.ries@leeds.ac.uk Last Modified: 02 Aug 2024 10:44

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DATA_for_article_on_glucose_cellobiose_cellulose_in_EMIMAc.xlsx [675kB] DATA_for_article_on_glucose_cellobiose_cellulose_in_EMIMAc.xlsx [675kB] DATA_for_article_on_glucose_cellobiose_cellulose_in_EMIMAc.xlsx [675kB] Security: Anyone File name: DATA_for_article_on_glucose_cellobiose_cellulose_in_EMIMAc.xlsx Content type: Data Mime-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet License: Creative Commons Attribution 4.0 International (CC BY 4.0) File size: 675kB