Measurement of the Dipolar Interaction between an Oxomolybdenum Center and a Phosphorus Nucleus in Models for the Molybdenum Cofactor of Enzymes by Pulsed Electron Spin Resonance at S-Band

1995 ◽  
Vol 99 (28) ◽  
pp. 11288-11291 ◽  
Author(s):  
V. V. Kurshev ◽  
L. Kevan ◽  
P. Basu ◽  
J. Enemark
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Dipolar Interaction ◽  
Molybdenum Cofactor ◽  
Spin Resonance ◽  
Phosphorus Nucleus

Konformationsuntersuchungen durch Elektronenspinresonanz Two-Jump-prozesse in Benzyl-phosphonium Salzen / Conformation Studies by Electron Spin Resonance Two-Jump Process in Benzyl-phosphonium Salts

1976 ◽  
Vol 31 (12) ◽  
pp. 1620-1629
Author(s):  
Klaus Scheffler ◽  
Klaus Hieke ◽  
Paul Schüler ◽  
Hartmut B. Stegmann
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Jump Process ◽  
Esr Spectra ◽  
Coupling Constants ◽  
Phosphonium Salts ◽  
Hindered Rotation ◽  
Limit Value ◽  
Spin Resonance ◽  
Phosphorus Nucleus

AbstractThe ESR spectra of 4-oxyl-benzyl-phosphonium-bromide radicals show a temperature dependence of the methylene protons and the phosphorus nucleus coupling constants which is explained by a hindered rotation of the phenoxyl ring of the radicals. Furthermore compounds with different phosphor substituents exhibit the phenomenon of a two jump process. This effect is described by an isomerisation of two symmetric radical conformations. Activation energies for this process are found to be around 7 kcal/Mol. The conformation of the radicals can be discussed as staggered ethane analogues. A lower limit value for the hyperconjugation Bᴾ -parameter is proposed.

Electron spin resonance of palladium-related defect in silicon

2009 ◽  
Vol 404 (23-24) ◽  
pp. 4586-4589
Author(s):  
T. Ishiyama ◽  
S. Kimura ◽  
Y. Kamiura ◽  
Y. Yamashita
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Resonance ◽  
Related Defect
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