Abstract
The superposition of paramagnetic species in CW EPR spectra usually prevents the measurement of spectral parameters. Separation of superimposed species can be performed in field-swept pulsed EPR by choosing a convenient pulse sequence in such a way that species with different relaxation times can be distinctly affected. Computer subtraction between spectra taken under different conditions may lead to better species identification. ForT2-based selection, the difference between FID-detected and long τ echo-detected spectra is used. This technique is successfully applied to the [Rh(CN)6]4−paramagnetic species created by radiation damage in [Rh(CN)6]3−in a KCl host lattice, where spectra corresponding to different positions of a charge-compensating positive-ion vacancy are superimposed.
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