Novel Anomaly of the Hyperfine Structure in Triplet ESR Spectra and Absolute Sign Determination of the Zero‐Field and Hyperfine Splitting Constants

1971 ◽  
Vol 54 (7) ◽  
pp. 3225-3226 ◽  
Author(s):  
Machio Iwasaki ◽  
Kayoko Minakata ◽  
Kazumi Toriyama
Keyword(s):  
Hyperfine Structure ◽  
Hyperfine Splitting ◽  
Esr Spectra ◽  
Zero Field ◽  
Sign Determination

ESR study of the structure and bonding situation in thiocyanatocopper(II) complexes with imidazole derivatives

1988 ◽  
Vol 53 (1) ◽  
pp. 56-60
Author(s):  
Anna Mašlejová ◽  
Reinhard Kirmse
Keyword(s):  
Unpaired Electron ◽  
Hyperfine Splitting ◽  
Esr Spectra ◽  
Ligand Field ◽  
Imidazole Derivatives ◽  
Bonding Parameters ◽  
Monomeric Complex ◽  
Structure And Bonding ◽  
Frozen Solutions ◽  
Planar Symmetry

ESR spectra of thianatocopper(II) complexes with imidazole derivatives were studied in ethanolic solutions at 295 and 123 K. Axialsymmetric spectra, attributed to the monomeric complex units, were obtained for the frozen solutions. The bonding parameters were interpreted by using calculated g, Cu-hyperfine, and 14N-ligand hyperfine splitting values. The Cu-N bond parameters indicate a considerable delocalization of the unpaired electron. The values of the isotropic Cu-hyperfine splitting suggest that the deviations from the planar symmetry of the CuN4 units are due to tetrahedral perturbation of the ligand field.

Association of radical anion with alkali cations. IV. ESR study of the 4-nitrobenzophenone radical anion

1980 ◽  
Vol 45 (2) ◽  
pp. 369-375 ◽  
Author(s):  
Stanislav Miertuš ◽  
Ondrej Kyseľ
Keyword(s):  
Hyperfine Splitting ◽  
Radical Anion ◽  
Esr Spectroscopy ◽  
Supporting Electrolyte ◽  
Esr Spectra ◽  
Proton Donor ◽  
Alkali Cations

The 4-nitrobenzophenone radical anion prepared by electrolysis was studied by ESR spectroscopy. On the basis of the interpretation of ESR spectra, the conformation of this system was estimated. The effect of the concentration of supporting electrolyte and of the presence of a proton-donor agent (C2H5OH) was examined. It is assumed that changes in hyperfine splitting constants are caused by association.

Determination of the zero field splitting and exchange narrowing of epr linewidth in Cr3+ delafossite-type oxides

1988 ◽  
Vol 49 (4) ◽  
pp. 377-379 ◽  
Author(s):  
J.M. Dance ◽  
A. Wichainchai ◽  
P. Dordor ◽  
E. Marquestaut ◽  
J.P. Doumerc ◽  
...  
Keyword(s):  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting ◽  
Exchange Narrowing
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