期刊
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
卷 730, 期 1-3, 页码 251-254出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.theochem.2005.06.034
关键词
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The effect of the environment, as modelled by hydrogen bonding, ion-pairing and/or general continuum model effects, is investigated for the phenoxyl free radical. All are shown to lead to a redistribution of spin density from the phenoxyl O atom to the C-ipso position. Isotropic and anisotropic hyperfine couplings are calculated at the B3LYP level of theory confirming this trend. Introduction of the continuum model has a significant effect the Na-O bond length of the ion-pair model significantly altering its calculated EPR properties in comparison with gas-phase values. The trends identified are of immediate significance for biological environmental effects on tyrosyl free radicals. (c) 2005 Elsevier B.V. All rights reserved.
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