Electron spin resonance and ENDOR investigation of the ion pairs of 4,4′-dicyanobenzophenone ketyl with alkali-metal cations

1988 ◽  
Vol 84 (10) ◽  
pp. 3279 ◽  
Author(s):  
Mario Barzaghi ◽  
Aldo Gamba ◽  
Cesare Oliva ◽  
Mario Branca ◽  
Antonio Saba
Keyword(s):  
Electron Spin Resonance ◽  
Alkali Metal ◽  
Electron Spin ◽  
Ion Pairs ◽  
Metal Cations ◽  
Alkali Metal Cations ◽  
Spin Resonance

Correlation of optical and electron spin resonance spectra for metal–electron species in alkali metal solutions

1977 ◽  
Vol 55 (11) ◽  
pp. 2017-2021 ◽  
Author(s):  
William Arthur Seddon ◽  
John Wallace Fletcher ◽  
Ron Catterall
Keyword(s):  
Electron Spin Resonance ◽  
Alkali Metal ◽  
Electron Spin ◽  
Ion Pairs ◽  
Solvent Polarity ◽  
Blue Shift ◽  
Esr Spectra ◽  
Absorption Bands ◽  
Continuous Transition ◽  
Spin Resonance

Pulse radiolysis of alkali metal cations (M+) in amines and tetrahydrofuran has demonstrated the formation of transient optical absorption bands attributed to a species of stoichiometry M. Such bands exhibit a distinct blue shift from that of es− observed in the same solvent. Comparisons with electron spin resonance (esr) spectra obtained in alkali metal solutions demonstrate that the blue shift can be correlated with the percent atomic character deduced for the species of the same stoichiometry. This correlation indicates that both the optical and esr spectra arise from the same species which, with decreasing solvent polarity, exhibits a continuous transition from well solvated ion-pairs to something approaching solvated atoms or tight ion-pairs.

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.

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