Abstract
Highly resolved EPR transitions displaying deuteron hyperfine effects in di- p-bromobenzophenone in a single crystal host have been recorded with the technique of electron spin echo envelope modulation (ESEEM). Orientation dependence of the observed line positions under variation of the external magnetic field in the crystallographic a, c-plane yielded the magnetic dipolar and deuteron quadrupole coupling matrices for deuterons at two positions in the molecule. The strong orientational dependence of the line intensities in the Fourier-transformed ESEEM decay could be fully accounted for by calculating the echo modulation amplitudes numerically, using these matrices.
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