Electron spin resonance of alkali-metal-doped fullerenes

1992 ◽  
Vol 96 (25) ◽  
pp. 10258-10261 ◽  
Author(s):  
Farid Bensebaa ◽  
Bosong Xiang ◽  
Larry Kevan
Keyword(s):  
Electron Spin Resonance ◽  
Alkali Metal ◽  
Electron Spin ◽  
Doped Fullerenes ◽  
Spin Resonance ◽  
Metal Doped

Correlation of optical and electron spin resonance spectra for alkali metal solutions in ethylamine and tetrahydrofuran

1976 ◽  
Vol 54 (19) ◽  
pp. 3110-3113 ◽  
Author(s):  
R. Catterall ◽  
J. Slater ◽  
W. A. Seddon ◽  
J. W. Fletcher
Keyword(s):  
Electron Spin Resonance ◽  
Optical Absorption ◽  
Alkali Metal ◽  
Electron Spin ◽  
Hyperfine Splitting ◽  
Pulse Radiolysis ◽  
Optical Absorption Spectra ◽  
Monomeric Species ◽  
Spin Resonance ◽  
Sodium Tetraphenylboron

The band maxima of transient optical absorption spectra observed by pulse radiolysis in ethylamine (EA)/tetrahydrofuran (THF) mixtures containing sodium tetraphenylboron are correlated with electron spin resonance (esr) hyperfine splitting constants obtained in potassium/EA/THF solutions. The data suggest that the optical spectra can be attributed to the same 'monomeric' species as observed by esr in alkali metal solutions.

An electron spin resonance study of pure anthracene doped with alkali metals

1970 ◽  
Vol 23 (2) ◽  
pp. 261 ◽  
Author(s):  
VC Bien ◽  
LE Lyons
Keyword(s):  
Electron Spin Resonance ◽  
Alkali Metal ◽  
Exchange Interaction ◽  
Line Width ◽  
Electron Spin ◽  
Alkali Metals ◽  
Spin Lattice Relaxation ◽  
Electron Spin Resonance Study ◽  
Pure Nitrogen ◽  
Spin Resonance

When pure anthracene is melted under a pure nitrogen atmosphere in the presence of an alkali metal, the metal dissolves forming a blue-green melt which exhibits an electron spin resonance (e.s.r.) signal. The polycrystalline samples of the solid system (MAn) obtained by cooling the melt also exhibit e.s.r, signals but with a line-width greater than that seen in the melt. The Lorentzian line-shapes in the solid and the melt indicate that the electrons producing the signals are either delocalized, or clustered and undergoing exchange interaction. The following features are discussed: the lack of hyperfine structure in the melt except for a special case; the Curie dependence of the susceptibility; the dependence of the g-values on the alkali metal; the shifts of the g-values on melting the samples; the behaviour of the line-width with respect to deuteration of anthraoene and with respect to the different alkali metals; and the dependence of the spin-lattice relaxation time on the alkali metal and on whether the sample was solid or molten. The features indicate that the electrons behave as simple doublets, are clustered with the alkali-metal complex in the solid and undergo exchange interaction, produce motional narrowing of lines in the melt, and produce a line-width mainly dependent on the alkali metal ions in the solid and to a lesser extent in the melt.

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