Molecular structure and dynamics of off-center Cu2+ ions and strongly coupled Cu2+–Cu2+ pairs in BaF2 crystals: Electron paramagnetic resonance and electron spin relaxation studies

2007 ◽  
Vol 127 (12) ◽  
pp. 124705 ◽  
Author(s):  
S. K. Hoffmann ◽  
J. Goslar ◽  
S. Lijewski ◽  
V. A. Ulanov
Keyword(s):  
Molecular Structure ◽  
Electron Paramagnetic Resonance ◽  
Spin Relaxation ◽  
Electron Spin ◽  
Paramagnetic Resonance ◽  
Electron Spin Relaxation ◽  
Strongly Coupled ◽  
Structure And Dynamics ◽  
Relaxation Studies ◽  
Electron Paramagnetic

The Temperature Dependence of the Electron Paramagnetic Resonance Spectrum of Ferricytochrome c Solutions Between 4.2 °K and 77 °K

1971 ◽  
Vol 49 (6) ◽  
pp. 695-699 ◽  
Author(s):  
C. Mailer ◽  
C. P. S. Taylor
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Temperature Dependence ◽  
Electron Spin ◽  
Heme Iron ◽  
Spin Lattice Relaxation ◽  
Paramagnetic Resonance ◽  
Gaussian Shape ◽  
Electron Spin Relaxation ◽  
Ferricytochrome C ◽  
Electron Paramagnetic

Electron paramagnetic resonance (E.P.R.) signals from tuna ferricytochrome c solutions were obtained in the temperature range 4.2–77 °K. The microwave power and temperature dependence of the spectra obtained fit the theory for a Kramer's doublet split by a magnetic field. The g-values obtained are 1.25, 2.24, and 3.05 in agreement with other workers (Salmeen, I., and Palmer, G.: J. Chem. Phys. 48, 2049 (1968)). The g = 3.05 line changes from 380 G wide at 20–40 °K with Gaussian shape to 700 G wide at 77 °K with Lorentzian shape. Analysis shows that the Gaussian shape can be explained by variation in the rhombic symmetry of the heme iron environment, a ± 6% spread in rhombic potential being required to give a 380 G line width. At higher temperatures the line appears to be determined by the electron spin-lattice relaxation time. Below 20 °K the E.P.R. absorption signal is saturated, and a large E.P.R. dispersion signal appears, due to fast passage effects, which can be used to give further information on electron spin relaxation times.

scholarly journals Electron Spin Relaxation Studies of Polydopamine Radicals

2021 ◽  
Vol 125 (3) ◽  
pp. 841-849 ◽  
Author(s):  
Krzysztof Tadyszak ◽  
Radosław Mrówczyński ◽  
Raanan Carmieli
Keyword(s):  
Spin Relaxation ◽  
Electron Spin ◽  
Electron Spin Relaxation ◽  
Relaxation Studies
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