scholarly journals Electron Spin Resonance of High-Spin Cobalt in Microporous Crystalline Cobalt-Containing Aluminophosphates

2000 ◽  
Vol 104 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Bert M. Weckhuysen ◽  
An A. Verberckmoes ◽  
Myriam G. Uytterhoeven ◽  
Frank E. Mabbs ◽  
David Collison ◽  
...  
Keyword(s):  
Electron Spin Resonance ◽  
High Spin ◽  
Electron Spin ◽  
Spin Resonance

Electron spin resonance and Moessbauer study of the high-spin-low-spin transition in [Fe(phen)2(NCS)2] and [Fe(pic)3]Cl2.EtOH

1981 ◽  
Vol 20 (1) ◽  
pp. 204-207 ◽  
Author(s):  
P. Sambasiva. Rao ◽  
Amikam. Reuveni ◽  
Bruce R. McGarvey ◽  
Prabuddha. Ganguli ◽  
Philipp. Guetlich
Keyword(s):  
Electron Spin Resonance ◽  
High Spin ◽  
Electron Spin ◽  
Spin Transition ◽  
Spin Resonance

Electron capture by oxyhaemoglobin: an e. s. r. study

1978 ◽  
Vol 201 (1144) ◽  
pp. 285-300 ◽  
Keyword(s):  
Electron Spin Resonance ◽  
Spin Density ◽  
Electron Capture ◽  
High Spin ◽  
Electron Spin ◽  
Unpaired Electron ◽  
Spin Resonance ◽  
Paramagnetic Centres ◽  
Oxygen Atoms

Exposure of aqueous glasses containing oxyhaemoglobin to 60 Co γ rays at 77 K gave two similar paramagnetic centres whose electron spin resonance (e. s. r.) spectra resembled those of low-spin ferric derivatives. These were shown to be formed in the α and β chains by electron capture. The use of oxygen labelled with 17 O showed the presence of two inequiva­lent oxygen atoms and it is shown that the unpaired electron has consider­able spin density on the dioxygen ligand as well as on iron. When warmed above 77 K two new paramagnetic centres were formed, possibly as a result of protonation, before the formation of normal high-spin methaemoglobin, presumably by loss of HO 2 ¯ . Oxymyoglobin gave comparable centres.

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