An electron spin resonance study of the association of a surfactant nitroxyl radical with a cationic micelle using spin-intensity measurements and hyperfine structure analyses

1978 ◽  
Vol 100 (15) ◽  
pp. 4783-4786 ◽  
Author(s):  
C. L. Kwan ◽  
Samir Atik ◽  
Lawrence A. Singer
Keyword(s):  
Electron Spin Resonance ◽  
Hyperfine Structure ◽  
Electron Spin ◽  
Nitroxyl Radical ◽  
Electron Spin Resonance Study ◽  
Intensity Measurements ◽  
Spin Resonance ◽  
Spin Resonance Study

Electron spin resonance study of the 1,3,5-trinitrobenzene–NaOH system

1970 ◽  
Vol 48 (21) ◽  
pp. 3440-3442 ◽  
Author(s):  
A. R. Norris ◽  
A. Breck ◽  
W. Depew ◽  
J. K. S. Wan
Keyword(s):  
Electron Spin Resonance ◽  
Sodium Hydroxide ◽  
Hyperfine Structure ◽  
Electron Spin ◽  
Aqueous System ◽  
Electron Spin Resonance Study ◽  
Paramagnetic Species ◽  
Spin Resonance ◽  
Spin Resonance Study

Electron spin resonance spectra were observed in an aqueous system containing 1,3,5-trinitrobenzene and concentrated sodium hydroxide at 0 to 40 °C. From the hyperfine structure of the spectra and temperature studies, it is concluded that the paramagnetic species is a radical generated by reduction of a 1,3,5-trinitrobenzene–OH− σ-complex. The spectral assignments were supported by using deuterated 1,3,5-trinitrobenzene.

A comparative electron spin resonance study of the selenothiadiazolyl radicals cyclo-Se3–nSnN2+ (n = 0–3)

1988 ◽  
Vol 66 (7) ◽  
pp. 1776-1780 ◽  
Author(s):  
Ed Awere ◽  
Jack Passmore ◽  
Keith F. Preston ◽  
Leslie H. Sutcliffe
Keyword(s):  
Electron Spin Resonance ◽  
Hyperfine Structure ◽  
Electron Spin ◽  
Electron Spin Resonance Study ◽  
Polar Solvents ◽  
Cation Radicals ◽  
Spin Resonance ◽  
Comparative Electron ◽  
Spin Resonance Study ◽  
Made In

Electron spin resonance spectra observed in dilute solutions of the hexafluoroarsenate salts of selenothiadiazolylium cations in polar solvents are ascribed to the parent cation radicals [Formula: see text], [Formula: see text], [Formula: see text], and[Formula: see text]. The g- and nitrogen hyperfine tensors for the three selenium-containing species are entirely in line with the planar π-radical description deduced in earlier studies of trithiadiazolylium. Substantial increases in the g-shifts on substitution of sulphur by selenium result in broadening of the solution spectra and concomitant loss of nitrogen hyperfine structure. From measurements made in solid SO2, the following principal tensor components were deduced for the new, Se-containing radicals:[Formula: see text]: g = (1.9930, 2.0108, 2.1379), aN(2) = (7.4, ≈0, ≈0) gauss, aSe(2) = (180, 70, 43) gauss;[Formula: see text]: g = (1.9941, 2.0108, 2.1355), aN(2) = (6.9, ≈0, ≈0) gauss, aSe(2) = (180, 70, 45) gauss;[Formula: see text]: g = (1.9957, 2.0086, 2.0736), aN(2) = (8.3, ≈0, ≈0) gauss, aSe = (198, 78, 75) gauss, where the values are given in the order x, y, z, x being the direction perpendicular to the radical plane.

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