Abstract
Ammonia or amines were adsorbed on magnesium oxide powder and their interaction with surface-trapped electrons (produced by radiolysis) was investigated by electron spin resonance spectroscopy. Hyperfine interaction was dependent upon surface coverage but arose from interaction with nitrogen nuclei only; no proton coupling was detected. Spectra characteristic of either two (A(/sup 14/N) approx. = 16 G) or three (A(/sup 14/N) approx. = 8 to 11 G) equivalent N were resolved, with g/sub av/ values in the range 2.0010 to 2.0017. These hyperfine parameters are similar to those predicted for solvated electrons in liquid ammonia. 14 figures, 1 table.
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