Density Dependence of the Absorption Spectrum of solvated Electrons in Supercritical Ammonia

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Abstract
Preliminary experiments are reported on the density dependence of the absorption spectrum of the solvated electron in supercritical ammonia. solvated electrons were produced by pulse radiolysis in a heated high pressure optical cell. The intensity of the absorption spectrum diminishes with decreasing the ammonia density, and could be detected at 150°C down to densities of 0.1 g/ml. The shape of the spectrum and its position are only slightly changed indicating that normal solvation even at the low densities is possible. The spectroscopic data can be adequately interpreted by a theoretical molecular model for electron localization in a polar dense fluid.