The absorption spectrum ore; in ethanol is composed of 'hrce bands, suggesting the existence of various kinds of traps. The reuapping phenomenon and the increase of the Bz radical were observed after photobleaching e; at 4"K, but not e;. The photc-transition of ei is a bound-free one, but that of e;
Spectra of electrons trapped in ethanol-water mixtures irradiated at 4.2 K
β Scribed by Cz. Stradowski; M. Wolszczak; J. Kroh
- Publisher
- Elsevier Science
- Year
- 1980
- Weight
- 125 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0146-5724
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Careful elamination of glassy ethanol, and other alcohols for comparison, y-imdiated at 4.3, I;, indicates that the initial absorption spectrum of trapped electrons has t\ro components: one is due to IR-absorbing electrons and the other to visibleabsorbing electrons. Both the electrons are stabilize
77 K acre invsstlgated by opt~nl absorption and ESR mcasuremcnts over B wldc range or conccntntions. Abrupt changes of yield and spectral parameters were obscrvcd between I Z and Ia mol% etkmol where a structural tinsICon of the mbture had been reported.
The 7 irradiation of an ethanol glass at 77Β°K produces solvated electrons (e,) which have an absorption spectrum with hax = 520 nm at 6Β°K. The conversion of esinto trapped electrons which absorb in the infrared (i.e., electrons in unrelaxed traps denoted by et) has been observed in bleaching es -at