Influence of the Electric Charge of Spin Probes on Their Diffusion in Room-Temperature Ionic Liquids

被引：3

作者：

Kattnig, B. Y. Mladenova ^{[3
]}

Chumakova, N. A. ^{[1
,2
]}

Kattnig, D. R. ^{[3
]}

Grigor'ev, I. A. ^{[4
]}

Grampp, G. ^{[5
]}

Kokorin, A., I ^{[1
,6
]}

机构：

[1] Russian Acad Sci, NN Semenov Fed Res Ctr Chem Phys, Moscow 119991, Russia

[2] Moscow MV Lomonosov State Univ, Chem Dept, Moscow 119991, Russia

[3] Univ Exeter, Living Syst Inst, Exeter EX4 4QD, Devon, England

[4] Russian Acad Sci, NN Vorozhtsov Novosibirsk Inst Organ Chem, Siberian Branch, Novosibirsk 630090, Russia

[5] Graz Univ Technol, Inst Phys & Theoret Chem, A-8010 Graz, Austria

[6] Plekhanov Russian Univ Econ, Moscow 115093, Russia

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2021年 / 125卷 / 32期

关键词：

DIPOLE-DIPOLE INTERACTIONS; NITROXIDE FREE-RADICALS; EPR SPECTROSCOPY; TRANSLATIONAL DIFFUSION; PRESSURE-DEPENDENCE; HYDROGEN-BONDS; EXCHANGE; VISCOSITY; MANIFESTATIONS; NANOSTRUCTURE;

D O I：

10.1021/acs.jpcb.1c02493

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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, emimBF(4), 1-butyl-3-methylimidazolium tetrafluoroborate, bmimBF(4), 1-octyl-3-methylimidazolium tetrafluoroborate, omimBF(4), 1-octyl-3-methylimidazolium hexafluorophosphate, omimPF(6), 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.

引用

页码：9235 / 9243

页数：9

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