Electron tunnelling in glassy media. γ-Radiolysis investigation of electron scavenging in methanol, 2-methyltetrahydrofuran and 10 mol dm–3hydroxide glasses at 77 K
- 1 January 1975
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 71, 1555-1562
- https://doi.org/10.1039/f29757101555
Abstract
The efficiency of electron scavenging by a range of solute molecules in methanol, 2-methyltetrahydrofuran (MTHF) and 10 mol dm–3 hydroxide glasses has been investigated by γ-radiolysis at 77 K using spectrophotometric detection. The data have been analyzed using the recent theory of Dainton, Pilling and Rice, and a satisfactory fit found. The trap depths for the three systems are estimated to be 1.7 eV (methanol), 1.0 eV (MTHF) and 0.95 eV (aq. hydroxide). A wide variation in the scavenging efficiency is tentatively ascribed to the differing geometries of the scavenger molecules. For MTHF and 10 mol dm–3 hydroxide glasses, the efficiency of scavenging is independent of wavelength, suggesting that the width of the electron spectrum is not due to a range of trap depths.Keywords
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