Hyperfine anisotropy and mobility of organic radical cations in zeolites
- 1 January 1993
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 89 (12) , 2101-2105
- https://doi.org/10.1039/ft9938902101
Abstract
Quantitative simulations of EPR powder spectra of organic radical cations in zeolites are reported. The anisotropy of the hypefine interactions and of the g-factor tensors is interpreted in terms of the mobility of the species. The radical cation formed by spontaneous oxidation of tetramethylethene in activated HZSM-5 is shown to rotate about the axis perpendicular to the molecular plane at room temperature, but it is immobile at 100 K. The radical cation derived from 2,5-dimethylhexa-1,5-diene in H-mordenite can execute only librational motion on a timescale of ca. 50 ns.Keywords
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