Microscopic and Macroscopic Properties of Carbohydrate
Solutions in the Ionic Liquid 1‑Ethyl-3-methyl-imidazolium
Acetate
Version 3 2018-09-20, 04:18
Version 2 2018-09-14, 20:13
Version 1 2018-09-06, 14:38
Posted on 2018-09-20 - 04:18
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 to 70 °C inclusive, for a range of concentrations (0–15
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 all analyzed together through the 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, α, 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.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Ries, Michael E.; Radhi, Asanah; Green, Stephen M.; Moffat, Jamie; Budtova, Tatiana (2018). Microscopic and Macroscopic Properties of Carbohydrate
Solutions in the Ionic Liquid 1‑Ethyl-3-methyl-imidazolium
Acetate. ACS Publications. Collection. https://doi.org/10.1021/acs.jpcb.8b06939
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
Read the peer-reviewed publication
AUTHORS (5)
MR
Michael E. Ries
AR
Asanah Radhi
SG
Stephen M. Green
JM
Jamie Moffat
TB
Tatiana Budtova