scholarly journals Электронный спиновый резонанс многослойного графена, синтезированного с полистиролом

2020 ◽  
Vol 46 (4) ◽  
pp. 37
Author(s):  
П.В. Семенихин ◽  
А.Н. Ионов ◽  
М.Н. Николаева
Keyword(s):  
Magnetic Field ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Free Electron ◽  
Internal Magnetic Field ◽  
G Factor ◽  
Spin Resonance

The temperature and magnetic field dependences of electron spin resonance was investigated for a graphite / polystyrene composite. The obtained value for the g-factor does not depend on temperature and is equal to 2.003, which is close to the value for a free electron for carbon (g = 2.0022-2.0035). This behavior of the g-factor excludes the possibility of an internal magnetic field in the composite.

scholarly journals Manipulation of mobile spin coherence using magnetic-field-free electron spin resonance

2013 ◽  
Vol 9 (5) ◽  
pp. 280-283 ◽  
Author(s):  
H. Sanada ◽  
Y. Kunihashi ◽  
H. Gotoh ◽  
K. Onomitsu ◽  
M. Kohda ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Free Electron ◽  
Spin Coherence ◽  
Spin Resonance

Electron spin resonance detection of heterogeneous reactions of Pigment Red 122

1990 ◽  
Vol 68 (4) ◽  
pp. 640-643
Author(s):  
Mary Jane Walzak ◽  
John R. Harbour
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Radical Anion ◽  
Heterogeneous Reactions ◽  
Resonance Spectroscopy ◽  
G Factor ◽  
Spin Resonance ◽  
Two Component ◽  
Induced Signal ◽  
Resonance Detection

Electron spin resonance spectroscopy (ESR) has been used to investigate the electrochemical and photolytic behaviour of particulate C.I. Pigment Red 122. Heterogeneous electrochemical reduction and oxidation of the pigment resulted in different reversible ESR signals with the radical cation giving a signal of ΔHpp = 2.3 G and g-factor of 2.0033 and the radical anion giving ΔHpp = 3.2 G and g-factor 2.0039. On exposure to light the inherent ESR signal, which was determined to be a two-component signal, increased in intensity by a factor of 2.4 but did not change in linewidth or g-factor. This light-induced signal was reversible and decayed to initial levels in the dark. The mechanism of these reactions is discussed. Keywords: ESR, pigment, electrochemistry, photo effects.

An Electron Spin Resonance Examination of Ferrocenylalkyl- and Aryl Ketyls

1972 ◽  
Vol 50 (12) ◽  
pp. 1825-1830 ◽  
Author(s):  
G. Bigam ◽  
John Hooz ◽  
Siegfried Linke ◽  
R. E. D. McClung ◽  
Melvyn W. Mosher ◽  
...  
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Free Electron ◽  
Hyperfine Splitting ◽  
Electron Densities ◽  
Spin Resonance ◽  
Hyperfine Splittings ◽  
Insight Into

Several ferrocenylalkyl- and aryl ketyls were generated and their e.s.r. spectra were recorded. Pentadeuterio-benzoylferrocene and benzoyl perdeuterioferrocene were synthesized. Analysis of the e.s.r. spectra of their corresponding ketyls enabled the determination of the hyperfine splitting constants of benzoylferrocene ketyl, and allowed an assignment of the electron densities at various positions in the molecule.A comparison of the magnitudes of the g-values for the ketyls derived from benzophenone (2.0034), benzoylferrocene (2.0062), and 2,2-dimethylpropanoylferrocene (2.0126), combined with the proton hyperfine splittings, gave some insight into the nature of the interaction of the free electron with the ferrocene system.

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