The contribution of electronically excited states to the radiation chemistry of organic systems
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:
- DOE; 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
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500* -- Photochemistry
400600 -- Radiation Chemistry
ALKANES
ANTHRACENE
AROMATICS
BENZENE
COLLISIONS
CONDENSED AROMATICS
CURRENTS
CYCLOALKANES
CYCLOHEXANE
DOCUMENT TYPES
EFFICIENCY
ELECTRIC CURRENTS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
EMISSION SPECTRA
ENERGY TRANSFER
FLUORESCENCE
FLUORINATED AROMATIC HYDROCARBONS
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
ION PAIRS
LUMINESCENCE
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHOTOCURRENTS
PROGRESS REPORT
QUANTUM EFFICIENCY
RECOMBINATION
SPECTRA
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400500* -- Photochemistry
400600 -- Radiation Chemistry
ALKANES
ANTHRACENE
AROMATICS
BENZENE
COLLISIONS
CONDENSED AROMATICS
CURRENTS
CYCLOALKANES
CYCLOHEXANE
DOCUMENT TYPES
EFFICIENCY
ELECTRIC CURRENTS
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
EMISSION SPECTRA
ENERGY TRANSFER
FLUORESCENCE
FLUORINATED AROMATIC HYDROCARBONS
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
ION PAIRS
LUMINESCENCE
MOLECULE COLLISIONS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PHOTOCURRENTS
PROGRESS REPORT
QUANTUM EFFICIENCY
RECOMBINATION
SPECTRA