Formation of excited states of N,N,N',N'-tetramethyl-p-phenylenediamine in irradiated nonpolar liquids. [Electron beams]

Journal Article · Thu Nov 22 04:00:00 EST 1984 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150668a025· OSTI ID:5700684

Choi, H T; Tweeten, D W; Lipsky, S

The yield of N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) excited states, G/sub s/, has been obtained in irradiated tetramethylsilane, isooctane, cyclopentane, n-hexane, and cyclohexane as a function of TMPD concentration, c, over the range c = 0.5 x 10/sup -3/-50 x 10/sup -3/ M. In tetramethylsilane and isooctane, G/sub s/ is found to be linear on c as would be expected on the basis of a nondiffusional transfer of the solvent ion positive charge to TMPD followed by recombination of TMPD/sup +/ with the geminate electron. In cyclopentane, n-hexane, and cyclohexane, G/sub s/ becomes increasingly concave downward in its depedence on c. This concavity is attributed to an increasing contribution to G/sub s/ from excited states of the solvent that nonradiatively transfer their energy to TMPD. Optical excitation of cyclohexane at 147 nm and measurement of the quenching of its fluorescence by TMPD confirm this view.

• Research Organization: Univ. of Minnesota, Minneapolis
• OSTI ID: 5700684
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:24; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKANES
AMINES
AROMATICS
BEAMS
CHEMICAL RADIATION EFFECTS
CHEMISTRY
CYCLOALKANES
DATA
ELECTRON BEAMS
ENERGY LEVELS
EXCITED STATES
EXPERIMENTAL DATA
HEXANE
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
LEPTON BEAMS
NUMERICAL DATA
OCTANE
ORGANIC COMPOUNDS
ORGANIC SILICON COMPOUNDS
PARTICLE BEAMS
RADIATION CHEMISTRY
RADIATION EFFECTS
SILANES
SILICON COMPOUNDS