The contribution of electronically excited states to the radiation chemistry of organic systems

Technical Report · Mon Jan 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/5119145· OSTI ID:5119145

Lipsky, S

The photocurrent from anthracene in 2,2,4-trimethylpentane, 2.2- dimethylbutane, cyclohexane, cyclopentane, and tetramethylsilane has been studied as a function of excitation energy from the ionization threshold to the onset of strong solvent absorption. The fluroescence from solutions of hexafluorobenzene in cyclopentane, 2,2,4-trimethylpentane, 2,2-dimethylbutane and tetramethylsilane irradiated with {beta}-particles has been studied as a function of the hexafluorobenzene concentration from c = 10{sup {minus}3}-10{sup {minus}1} M. The data are analyzed to permit extraction of the geminate ion-pair scavenging probability. The absorption of 160 nm light by cyclohexane in mixtures of cyclohexane, benzene and tetraphenylmethylenediamine results in an emission spectrum consisting of the simultaneous fluorescence from all three components. A mechanism for the development of this spectrum and its dependence on benzene concentration is constructed and shown to be quantitatively consistent with the results of independent measurements on the separate components. 55 refs.

• Research Organization: Minnesota Univ., Minneapolis, MN (United States). Dept. of Chemistry
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG02-85ER13404
• OSTI ID: 5119145
• Report Number(s): DOE/ER/13404-6; ON: DE92001987
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ANTHRACENE
PHOTOCURRENTS
ELECTRON-MOLECULE COLLISIONS
FLUORESCENCE
ION PAIRS
RECOMBINATION
BENZENE
CYCLOHEXANE
EMISSION SPECTRA
ENERGY TRANSFER
FLUORINATED AROMATIC HYDROCARBONS
PROGRESS REPORT
QUANTUM EFFICIENCY
ALKANES
AROMATICS
COLLISIONS
CONDENSED AROMATICS
CURRENTS
CYCLOALKANES
DOCUMENT TYPES
EFFICIENCY
ELECTRIC CURRENTS
ELECTRON COLLISIONS
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
LUMINESCENCE
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
SPECTRA
400500* - Photochemistry
400600 - Radiation Chemistry