Magnetic interactions between the reduced bacteriopheophytin and quinone electron acceptors in reaction centers of the photosynthetic purple bacterium rhodopseudomonas viridis: An X‐band and Q‐band electron paramagnetic resonance study

1996 ◽  
Vol 104 (5) ◽  
pp. 1805-1812 ◽  
Author(s):  
Johan S. Van den Brink ◽  
Peter Gast ◽  
Arnold J. Hoff
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Electron Paramagnetic Resonance Study ◽  
Reaction Centers ◽  
Electron Acceptors ◽  
Magnetic Interactions ◽  
Purple Bacterium ◽  
Paramagnetic Resonance ◽  
Rhodopseudomonas Viridis ◽  
X Band ◽  
Electron Paramagnetic

Electron paramagnetic resonance study of Mn2+ doped Mg(ClO4)2∙6H2O

1978 ◽  
Vol 56 (9) ◽  
pp. 1175-1181 ◽  
Author(s):  
R. Dayal ◽  
D. Ramachandra Rao ◽  
Putcha Venkateswarlu
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Room Temperature ◽  
Structural Phase ◽  
Electron Paramagnetic Resonance Study ◽  
Liquid Nitrogen Temperature ◽  
Paramagnetic Resonance ◽  
X Band ◽  
Principal Axes ◽  
The One ◽  
Electron Paramagnetic

Electron paramagnetic resonance of Mn2+ doped Mg(ClO4)2∙6H2O crystals has been studied from room temperature (300 K) down to liquid nitrogen temperature at X-band. The room temperature results show three inequivalent sites for Mn2+ in the crystal. Hyperfine forbidden transitions are observed when the magnetic field is not oriented along one of the principal axes. Two structural phase transitions have been observed at temperatures of 272 ± 1 and 103 ± 1 K, respectively. The transition occurring at 272 ± 1 K has been observed for the first time. The transition occurring at 103 ± 1 K is the one detected earlier through Mössbauer studies.

Multi-Band Electron Paramagnetic Resonance Study of Microcrystalline and Cluster Silicon Embedded in SiO2

2000 ◽  
Vol 609 ◽  
Author(s):  
Takashi Ehara ◽  
Tadaaki Ikoma ◽  
Shozo Tero-Kubota
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Line Width ◽  
Electron Paramagnetic Resonance Study ◽  
Epr Spectra ◽  
Paramagnetic Resonance ◽  
Band Electron ◽  
X Band ◽  
Epr Signal ◽  
Band Spectra ◽  
Electron Paramagnetic

ABSTRACTDangling bond defects (DB) in silicon microcrystallines and clusters embedded in SiO2 have been studied by X- and Q-band electron paramagnetic resonance (EPR) spectroscopy. The EPR spectra due to the DB were remarkably depending on the grain size, which was controlled by annealing temperature. The microcrystalline containing film shows a broad and unsymmetrical EPR signal at g = 2.006 with the line width of 13 G in X-band spectra. The signal can be simulated by using the anisotropic g-values of Pb center. The Si cluster samples obtained from the annealing at less than 800°C give an asymmetric EPR spectra at about g = 2.004 with the line width of about 9 G in X-band. The EPR signal due to the E' center was also observed.

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