Determination of photoconductivity thresholds for trapped electrons in amine and alcohol glasses from optical and photoconductivity studies. [Gamma radiation]

Journal Article · Thu Sep 03 04:00:00 EDT 1981 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150618a023· OSTI ID:6293199

Kato, N; Takagi, S; Fueki, K

Photoconductivity thresholds for trapped electrons in glassy amines (diisopropylamine and 1.2-propanediamine) and alcohols (methanol + 5% water, ethanol, 1-propanol, 2-propanol, and 1-butanol) at 77/sup 0/K have been determined from optical and photoconductivity studies. In the optical studies the wavelength dependence of the increase in the yield of pyrene anions, which were produced from pyrene present as a solute, upon photobleaching of trapped electrons was measured by optical absorption, and it was extrapolated to longer wavelengths by use of an empirical equation to obtain the photoconductivity threshold value. The same extrapolation procedure was applied to the photoconductivity data. The photoconductivity thresholds thus determined from optical and photoconductivity studies agree reasonably well with each other and are correlated with matrix polarity. These results indicate that electron transfer by photoexcitation from the trapped electron to pyrene occurs via excitation to the conduction state. It is also shown that the photoconductivity threshold is generally higher than the corresponding optical absorption threshold for the trapped electron in these matrices.

• Research Organization: Nagoya Univ., Japan
• OSTI ID: 6293199
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 85:18; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ABSORPTION SPECTRA
ALCOHOLS
AMINES
AQUEOUS SOLUTIONS
BUTANOLS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
DISPERSIONS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
ETHANOL
EXPERIMENTAL DATA
FERMIONS
GAMMA RADIATION
GLASS
HYDROXY COMPOUNDS
INFORMATION
IONIZING RADIATIONS
LEPTONS
LOW TEMPERATURE
MATERIALS
MATRIX MATERIALS
METHANOL
MIXTURES
NUMERICAL DATA
ORGANIC COMPOUNDS
PHOTOCONDUCTIVITY
PHYSICAL PROPERTIES
PROPANOLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS
SOLUTIONS
SPECTRA
TRAPPED ELECTRONS