Research output: Contribution to journal › Article › peer-review
Molecular Mobility in a Set of Imidazolium-Based Ionic Liquids [bmim] + A - by the NMR-Relaxation Method. / Bystrov, Sergei S.; Matveev, Vladimir V.; Chernyshev, Yurii S.; Balevičius, Vytautas; Chizhik, Vladimir I.
In: Journal of Physical Chemistry B, Vol. 123, No. 10, 14.03.2019, p. 2362-2372.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Molecular Mobility in a Set of Imidazolium-Based Ionic Liquids [bmim] + A - by the NMR-Relaxation Method
AU - Bystrov, Sergei S.
AU - Matveev, Vladimir V.
AU - Chernyshev, Yurii S.
AU - Balevičius, Vytautas
AU - Chizhik, Vladimir I.
PY - 2019/3/14
Y1 - 2019/3/14
N2 - The detailed investigation of the local mobility in a set of dried imidazolium-based ionic liquids (1-butyl-3-methylimidazolium) in a wide temperature range and varying anions (BF 4 - , I - , Cl - , Br - , NO 3 - , TfO - ) is presented. The measurements of temperature dependencies of the spin-lattice relaxation times of 1 H and 13 C nuclei are motivated by the need to obtain a fundamental characterization of molecular mobility of the substances under study, namely, to estimate the correlation times, τ c , for the motion of individual molecular groups. In particular, it follows from obtained results that the mobility of the hydrocarbon "tail" is higher (smaller τ c ) than that of the imidazole ring, and this expected tendency is quantified. The effect of the influence of an anion type on the cation mobility is also analyzed.
AB - The detailed investigation of the local mobility in a set of dried imidazolium-based ionic liquids (1-butyl-3-methylimidazolium) in a wide temperature range and varying anions (BF 4 - , I - , Cl - , Br - , NO 3 - , TfO - ) is presented. The measurements of temperature dependencies of the spin-lattice relaxation times of 1 H and 13 C nuclei are motivated by the need to obtain a fundamental characterization of molecular mobility of the substances under study, namely, to estimate the correlation times, τ c , for the motion of individual molecular groups. In particular, it follows from obtained results that the mobility of the hydrocarbon "tail" is higher (smaller τ c ) than that of the imidazole ring, and this expected tendency is quantified. The effect of the influence of an anion type on the cation mobility is also analyzed.
KW - ALKYL CHAIN-LENGTH
KW - C-13 NMR
KW - REORIENTATIONAL DYNAMICS
KW - 1-ETHYL-3-METHYLIMIDAZOLIUM ACETATE
KW - 1-BUTYL-3-METHYLIMIDAZOLIUM BROMIDE
KW - PHYSICOCHEMICAL PROPERTIES
KW - DIFFUSION-COEFFICIENTS
KW - LITHIUM-SALTS
KW - H-1
KW - SPECTROSCOPY
UR - http://www.scopus.com/inward/record.url?scp=85062873666&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcb.8b11250
DO - 10.1021/acs.jpcb.8b11250
M3 - Article
C2 - 30779569
AN - SCOPUS:85062873666
VL - 123
SP - 2362
EP - 2372
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
SN - 1520-6106
IS - 10
ER -
ID: 39998758