Trap-to-trap hole transfer studied by radiolysis/EPR. radical cations in freon and zeolite matrices.

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Chem. Phys. Lett.

DOI:https://doi.org/10.1016/S0009-2614(97)00295-9· OSTI ID:937964

Werst, D W; Han, P; Trifunac, A D

Electron paramagnetic resonance (EPR) spectroscopy was used to assess the positive charge distribution in irradiated solid samples containing mixtures of donor molecules. The relative trap populations were determined from the EPR intensities of the respective radical cations of the olefinic donors. The occurrence of trap-to-trap hole transfer was examined as a function of the donor pair, donor concentration, and matrix. Three matrices were studied: CF{sub 3}CCl{sub 3}, CFCl{sub 3}, and ZSM5 zeolite. The concentration dependence of the final charge distributions in some cases reflected the occurrence of resonant charge transfer. Surprising differences between CF{sub 3}CCl{sub 3} and CFCl{sub 3} are explained by differences in matrix chemistry. The radiolysis/EPR technique applied to double-loaded zeolites serves as a method of probing the intracrystalline adsorption distributions and mobilities of guest species in zeolites.

• Research Organization: Argonne National Laboratory (ANL)
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 937964
• Report Number(s): ANL/CHM/JA-24861
• Journal Information: Chem. Phys. Lett., Journal Name: Chem. Phys. Lett. Journal Issue: 1997 Vol. 269; ISSN CHPLBC; ISSN 0009-2614
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ADSORPTION
CATIONS
CHARGE DISTRIBUTION
ELECTRON SPIN RESONANCE
FREONS
HOLE MOBILITY
RADICALS
RADIOLYSIS
ZEOLITES