Thermal effects on the behavior of electrons trapped in aqueous solid clathrates
Trapping of electrons in the specific H/sub 2/O vacancy in irradiated tetrabutylammonium hydroxide clathrate has been investigated at temperatures below 25 /sup 0/C. A pulse radiolysis investigation has shown moderate slowdown of electron decay with reduction of temperature. The activation energy of detrapping is 0.045 eV for the majority of electrons which decay slowly in the pure clathrate and 0.32 eV in clathrates continuing N/sub 2/O as the second guest. At 170 K the decay is preceded by a change in the spectrum, consisting of a shift of the maximum from 620 to 575 nm, accompanied by the narrowing of the spectrum and an increase in its height. The change is completed in 100 ..mu..s, i.e., in the time similar to the relaxation time of water molecules, as concerns the order of magnitude, determined by dielectric methods for ice-like, solid hydrogen-bonded structures. A comparison of trapping of electrons in different aqueous systems at ambient and lower temperatures is presented.
- Research Organization:
- Univ. of Notre Dame, IN
- OSTI ID:
- 6970367
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 91:3; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400600 -- Radiation Chemistry
ACTIVATION ENERGY
ALKANES
AMMONIUM COMPOUNDS
AMMONIUM HYDROXIDES
ARRHENIUS EQUATION
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CLATHRATES
DATA
ELECTRONS
ELEMENTARY PARTICLES
ENERGY
EQUATIONS
EXPERIMENTAL DATA
FERMIONS
HYDRATES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
KINETICS
LEPTONS
LOW TEMPERATURE
MEDIUM TEMPERATURE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NITROUS OXIDE
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
TRAPPING