TY - JOUR
T1 - Influence of the Electric Charge of Spin Probes on Their Diffusion in Room-Temperature Ionic Liquids
AU - Kattnig, B. Y.Mladenova
AU - Chumakova, N. A.
AU - Kattnig, D. R.
AU - Grigor'Ev, I. A.
AU - Grampp, G.
AU - Kokorin, A. I.
N1 - Publisher Copyright:
© 2021 American Chemical Society. All rights reserved.
PY - 2021/8/19
Y1 - 2021/8/19
N2 - The rotational and translational diffusion of negatively charged and uncharged spin probes in five imidazolium-based room-temperature ionic liquids (RTILs), 1-ethyl-3-methylimidazolium tetrafluoroborate, emimBF4, 1-butyl-3-methylimidazolium tetrafluoroborate, bmimBF4, 1-octyl-3-methylimidazolium tetrafluoroborate, omimBF4, 1-octyl-3-methylimidazolium hexafluorophosphate, omimPF6, and 1-octyl-3-methylimidazolium chloride, omimCl, has been studied by means of electron paramagnetic resonance spectroscopy. Detailed analyses of the spin-Hamiltonian parameters and spin exchange interactions have been carried out. The temperature dependences of the line broadening induced by the electronic dipole-dipole interaction and the electron spin exchange coupling are determined. The translational mobility of spin probes is semiquantitatively characterized and successfully explained in the framework of a hypothesis based on the assumption of polar and unpolar domains within the RTILs.
AB - The rotational and translational diffusion of negatively charged and uncharged spin probes in five imidazolium-based room-temperature ionic liquids (RTILs), 1-ethyl-3-methylimidazolium tetrafluoroborate, emimBF4, 1-butyl-3-methylimidazolium tetrafluoroborate, bmimBF4, 1-octyl-3-methylimidazolium tetrafluoroborate, omimBF4, 1-octyl-3-methylimidazolium hexafluorophosphate, omimPF6, and 1-octyl-3-methylimidazolium chloride, omimCl, has been studied by means of electron paramagnetic resonance spectroscopy. Detailed analyses of the spin-Hamiltonian parameters and spin exchange interactions have been carried out. The temperature dependences of the line broadening induced by the electronic dipole-dipole interaction and the electron spin exchange coupling are determined. The translational mobility of spin probes is semiquantitatively characterized and successfully explained in the framework of a hypothesis based on the assumption of polar and unpolar domains within the RTILs.
UR - http://www.scopus.com/inward/record.url?scp=85113989087&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcb.1c02493
DO - 10.1021/acs.jpcb.1c02493
M3 - Article
C2 - 34378388
AN - SCOPUS:85113989087
SN - 1520-6106
VL - 125
SP - 9235
EP - 9243
JO - Journal of Physical Chemistry B
JF - Journal of Physical Chemistry B
IS - 32
ER -