Electron spin resonance and diffuse reflectance spectroscopy of the reduction of nickel(2+) with hydrogen in zeolites X and Y, exchanged with lanthanum(3+) and ammonium ion

1989 ◽  
Vol 93 (4) ◽  
pp. 1515-1521 ◽  
Author(s):  
Robert A. Schoonheydt ◽  
Ivan Vaesen ◽  
Hugo Leeman
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
Ammonium Ion ◽  
Spin Resonance

scholarly journals Characterization of Al2O3-Supported Manganese Oxides by Electron Spin Resonance and Diffuse Reflectance Spectroscopy

1997 ◽  
Vol 101 (3) ◽  
pp. 309-316 ◽  
Author(s):  
W. Sjoerd Kijlstra ◽  
Eduard K. Poels ◽  
Alfred Bliek ◽  
Bert M. Weckhuysen ◽  
Robert A. Schoonheydt
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Manganese Oxides ◽  
Diffuse Reflectance ◽  
Diffuse Reflectance Spectroscopy ◽  
Reflectance Spectroscopy ◽  
Spin Resonance

Electron spin resonance observations of photochemically generated contact ammonium ion-pairs of fluoro-substituted ketones

1979 ◽  
Vol 57 (5) ◽  
pp. 600-602 ◽  
Author(s):  
K. S. Chen ◽  
T. Foster ◽  
J. K. S. Wan
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Ion Pairs ◽  
Esr Spectra ◽  
Ammonium Ion ◽  
Spin Resonance ◽  
Photochemical Systems

Contact radical ion-pairs of ammonium and fluoro-substituted ketones were generated in photochemical systems and their here-to-fore elusive esr spectra were characterized.

Electron Spin Resonance Studies of Aliphatic Ammonium Ion Radicals in Aqueous Sulfuric Acid Glasses

1974 ◽  
Vol 52 (19) ◽  
pp. 3401-3409 ◽  
Author(s):  
Howard Reginald Falle ◽  
Frederick Peter Sargent
Keyword(s):  
Electron Spin Resonance ◽  
Sulfuric Acid ◽  
Electron Spin ◽  
Qualitative Agreement ◽  
Hydrogen Abstraction ◽  
Ammonium Ion ◽  
Torsional Motion ◽  
Hydrogen Atoms ◽  
Methylene Carbon ◽  
Spin Resonance

The reaction of hydrogen atoms with n-butylammonium ions in 6 M sulfuric acid glasses yields a characteristic eight-line e.s.r. spectrum, which is attributable to CH3ĊHCH2CH2NH3+. Evidence is drawn from computer simulated spectra and from the spectra of other alkylammonium radicals to account for this spectrum. Qualitative agreement between the simulated and experimental spectra is achieved by assuming that the CH3ĊHCH2— moiety can adopt a range of conformations and can also undergo torsional motion about the sp2 carbon – methylene carbon bond. The site of hydrogen abstraction from alkylammonium ions is evidently influenced by both NH3+ and CH3 groups; abstraction tends to occur away from the former and adjacent to the latter.

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