MAGNETIC PROPERTIES OF MESONAPHTHODIANTHRENE

1960 ◽  
Vol 38 (3) ◽  
pp. 323-328 ◽  
Author(s):  
Yoshio Matsunaga
Keyword(s):  
Molecular Structure ◽  
Magnetic Properties ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Diamagnetic Susceptibility ◽  
Central Line ◽  
Resonance Absorption ◽  
Spin Resonance ◽  
Unpaired Electrons ◽  
G Value

Electron spin resonance absorption was detected in mesonaphthodianthrene and mesonaphthodianthrone. The spectra of both of these compounds consist of, at least, seven lines with a separation of 4.4 oersteds and the central line has a g-value of 2.0024 ± 0.0002. The growth of the central line by admission of air was observed in the case of the hydrocarbon. Some suggestions are presented as to the nature of the unpaired electrons in these compounds. The magnitude of the molar diamagnetic susceptibility of mesonaphthodianthrene, after correction for the paramagnetic contribution from the unpaired electrons, is discussed in relation to the molecular structure.

THE ELECTRON SPIN RESONANCE ABSORPTION SPECTRA OF SEMIQUINONE IONS: PART III. FREE RADICAL SALTS OF QUINHYDRONES

1960 ◽  
Vol 38 (7) ◽  
pp. 1172-1176 ◽  
Author(s):  
Yoshio Matsunaga
Keyword(s):  
Electron Spin Resonance ◽  
Free Radical ◽  
Electron Spin ◽  
Resonance Spectrum ◽  
Resonance Absorption ◽  
Chloro Derivative ◽  
Spin Resonance ◽  
Stretching Vibration ◽  
G Value ◽  
Alkali Salts

Electron spin resonance absorption was observed in alkali salts of tetrachloro-p-benzoquin-hydrone, p-biphenoquinhydrone, and its tetrachloro and tetrabromo derivatives. The magnitude of g-value was found to be in the order of unsubstituted < chloro derivative < bromo derivative, and benzoquinhydrone salt < the corresponding p-biphenoquinhydrone salt. The frequency of C—O stretching vibration was observed in the range 1525 to 1550 cm−1. Based on these frequencies the estimation of the parameters which are necessary for the molecular orbital treatment of semiquinone ions was attempted. A set of αO = α + (l/3−l/2)β and βCO = β were derived. Independently values of αO = α + 2/3β and βCO = β were estimated using the hyperfine structure of the electron spin resonance spectrum of the α-naphthosemiquinone ion.

scholarly journals Dynamic Molecular Structure of DPPC-DLPC-Cholesterol Ternary Lipid System by Spin-Label Electron Spin Resonance

2004 ◽  
Vol 87 (4) ◽  
pp. 2483-2496 ◽  
Author(s):  
Yun-Wei Chiang ◽  
Yuhei Shimoyama ◽  
Gerald W. Feigenson ◽  
Jack H. Freed
Keyword(s):  
Molecular Structure ◽  
Electron Spin Resonance ◽  
Electron Spin ◽  
Spin Label ◽  
Spin Resonance ◽  
Lipid System

scholarly journals Magnetic Properties of Li3V2(PO4)3/Li3PO4 Composite

2021 ◽  
Vol 7 (5) ◽  
pp. 64
Author(s):  
Tatiana Gavrilova ◽  
Sergey Khantimerov ◽  
Mikhail Cherosov ◽  
Ruslan Batulin ◽  
Nickolay Lyadov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Electron Spin Resonance ◽  
Lithium Ion Batteries ◽  
Electron Spin ◽  
Lithium Ion ◽  
Mesoporous Structure ◽  
Thermal Hydrolysis ◽  
Hydrolysis Method ◽  
Spin Resonance ◽  
Simultaneous Existence

Here, we present the investigation of the magnetic properties of Li3V2(PO4)3/Li3PO4 composites, which can be potentially used as a cathode material in lithium-ion batteries. Li3V2(PO4)3/Li3PO4 was synthesized by the thermal hydrolysis method and has a granular mesoporous structure. Magnetic properties of the composite were investigated using magnetometry and electron spin resonance methods. Based on magnetization measurements, the simultaneous existence of the paramagnetic phase with antiferromagnetic interactions between spins of V3+ ions and magnetically correlated regions was suggested. Most probably, magnetically correlated regions were formed due to anti-site defects and the presence of V4+ ions that was directly confirmed by electron spin resonance measurements.

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