Electron capture in. gamma. -irradiated 2-methyltetrahydrofuran glasses containing two solutes at 77 K
Solute-anion yields in ..gamma..-irradiated 2-methyltetrahydrofuran glasses containing two solutes were measured at 77/sup 0/K. For solute pairs of p-benzoquinone (BQ)-biphenyl, BQ-pyrene, 1,4-naphthoquinone (NQ)-biphenyl, and pyrene-biphenyl, the results are summarized as follows. (1) The yield of the anion of the left-hand solute (S1) in each pair is little dependent upon the concentration of the other solute (S2). (2) The logarithm of the S2-anion yield is approximately linear in S1 concentration. The electron affinity of the first solute is larger than that of the second. The results are consistent with a scheme that an electron once trapped in a matrix tunnels to either S1 or S2 to form solute anions and an electron also tunnels from S2/sup -/ to S1. The yield of the anion of each solute in a BQ-NQ pair was found to depend on the concentration of the counterpart, in contrast with the results for the above solute pairs. The results for this pair can be explained in terms of a competitive capture scheme which does not include the tunneling from S2/sup -/to S1. 10 figures, 2 tables.
- Research Organization:
- Inst. of Physical and Chemical Research, Saitama, Japan
- OSTI ID:
- 6476871
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 82:18; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400600* -- Radiation Chemistry
ABSORPTION SPECTRA
AFFINITY
ANIONS
AROMATICS
BENZOQUINONES
BIPHENYL
CAPTURE
CHARGED PARTICLES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
CONDENSED AROMATICS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELECTRON CAPTURE
FURANS
GAMMA RADIATION
GLASS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
IONIZING RADIATIONS
IONS
LOW TEMPERATURE
MTHF
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PYRENE
QUANTITY RATIO
QUINONES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
SPECTRA
TEMPERATURE DEPENDENCE
TETRAHYDROFURAN
TRAPPING
TUNNELING
YIELDS