Time-resolved fluorescence-detected magnetic resonance and fluorescence studies of trialkylamines irradiated by pulse radiolysis in alkane solvents

Journal Article · Thu Jan 05 04:00:00 EST 1984 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150645a019· OSTI ID:5052169

Lefkowitz, S M; Trifunac, A D

Time-resolved fluorescence-detected magnetic resonance (FDMR) studies of irradiated alkane solutions of trialkylamines and scintillators reveal the EPR spectra of the trialkylaminium radicals, formed by scavenging solvent radical cations. A qualitative kinetic analysis indicates that the growth of the triethylaminium radical (TEA/sup +/-) FDMR signal occurs on similar time scales in both n-hexane and cyclohexane, suggesting that, in cyclohexane, TEA/sup +/- is formed by scavenging the lower mobility ''trapped'' cyclohexane radical cations. Fluorescence results indicate that TEA quenches both scintillator fluorescence and total FDMR intensities to a greater extent than is expected from amine scavenging of solvent holes. TEA also exhibits an intense, relatively long-lived fluorescence which is apparently not produced by radical ion recombination or energy transfer. 6 figures

• Research Organization: Argonne National Lab., IL
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5052169
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 88:1; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKANES
ALKYL RADICALS
AMINES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DECOMPOSITION
ELECTRON SPIN RESONANCE
EXPERIMENTAL DATA
FLUORESCENCE
HYDROCARBONS
INFORMATION
LUMINESCENCE
MAGNETIC RESONANCE
NUMERICAL DATA
ORGANIC COMPOUNDS
PULSE TECHNIQUES
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
RESONANCE
SCAVENGING
SOLVENTS