Optical indications of heterogeneous distribution of equilibrated solvated electrons in liquid and glassy ammonia-methanol solutions

Abstract

Optical absorption spectra of solvated electrons, e − s, have been studied in methanol solutions of ammonia (12 and 16 m%) by pulse microsecond radiolysis. A jump of 0.7 eV has been found in the temperature dependencies of the energy of the optical absorption maximum, ( E − M), at the range 10–15°. The absorption bands showed a structured shape at the temperatures near the jump region. The enhanced photosensibility of the shape and the location of spectra of trapped electrons (e − t) has been discovered in these matrices at 77 K. The obtained results indicated that the equilibrated distribution of excess electrons over traps has common heterogeneous nature for the liquid and glassy ammonia-methanol mixture. Validity of the extension of this conclusion over other polar liquids is discussed.