Motional Correlation Time in the Electron Spin Relaxation of S6 Spin State Ions in Solution
- 1 August 1971
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 55 (3), 1205-1212
- https://doi.org/10.1063/1.1676206
Abstract
The electron spin resonance (ESR) linewidth of Mn2+ and Fe3+ ions was measured as a function of temperature in various solvents which can reach high viscosity coefficients before solidification. With increasing correlation time, fast‐motion narrowing is no longer verified and the linewidth passes through a maximum value corresponding to . Evaluation of allows a quantitative check of the zero‐field splitting relaxation process. It has been found that modulation of the zero‐field splitting in most cases is not the only effective process in relaxing the spin system, even at room temperature. Evaluation of the hydrodynamical radii for Debye tumbling of the complexes gives results which are always smaller than expected. However, the dependence of the correlation time on the size of the complex strongly suggests that rotation of the zero‐field splitting tensor is responsible for the line broadening.
Keywords
This publication has 17 references indexed in Scilit:
- Electron spin relaxation of 8 S ions in solutionTransactions of the Faraday Society, 1970
- The electron resonance lineshapes of6S state transition metal ions in solutionMolecular Physics, 1969
- Linewith variations in the electron resonance spectra of transition metal ions undergoing ligand exchangeMolecular Physics, 1967
- Electron Spin Relaxation in Solvated Manganese(II) Ion SolutionsThe Journal of Chemical Physics, 1966
- Electron Magnetic Resonance and Electronic Spectra of Tetrachloroferrate(III) Ion in Nonaqueous Solution1The Journal of Physical Chemistry, 1965
- Electron spin resonance line widths of transition metal ions in solution. Relaxation through zero-field splittingMolecular Physics, 1964
- Theory of Linewidths in Electron Spin Resonance SpectraThe Journal of Chemical Physics, 1963
- Solvent Extraction of Inorganic Species.Chemical Reviews, 1963
- Note on the Paramagnetic Resonance of Iron in GlassThe Journal of Chemical Physics, 1960
- Line Widths in the Paramagnetic Resonance of Transition Ions in SolutionThe Journal of Physical Chemistry, 1957