scholarly journals Direct enantiomeric discrimination through antisymmetric hyperfine coupling

2021 ◽  
Author(s):  
Piotr Garbacz ◽  
Juha Vaara
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Hyperfine Coupling ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Molecular Chirality ◽  
Enantiomeric Discrimination ◽  
Electron Paramagnetic

A chirality-sensitive effect induced by antisymmetric hyperfine coupling, which lifts the intrinsic insensitivity of electron paramagnetic resonance spectroscopy to molecular chirality, is described.

scholarly journals Evidence from electron-paramagnetic-resonance spectroscopy for a complex of sulphite ions with the molybdenum centre of sulphite oxidase

1982 ◽  
Vol 201 (1) ◽  
pp. 241-243 ◽  
Author(s):  
R C Bray ◽  
M T Lamy ◽  
S Gutteridge ◽  
T Wilkinson
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Hyperfine Coupling ◽  
Resonance Spectrum ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Low Ph ◽  
Resonance Spectroscopy ◽  
Paramagnetic Resonance ◽  
Ph Values ◽  
Sulphite Oxidase ◽  
Electron Paramagnetic

Reduction of sulphite oxidase by sulphite at low pH values in Mes (4-morpholine-ethanesulphonic acid) buffer gives rise to a new molybdenum(V) electron-paramagnetic-resonance spectrum different from that obtained by photoreduction of the enzyme in the same medium. The spectrum is attributed to a sulphite complex of the enzyme, showing g-values of about 2.000, 1.972 and 1.963. The complex is analogous to that with the inhibitor phosphate in that it gives rise to no observable hyperfine coupling of Mo(V) to exchangeable protons.

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