SELECTION OF SPECIES IN DIVALENT RHODIUM HEXACYANIDE USING PULSED EPR

The superposition of paramagnetic species in CW EPR spectra usually pr events the measurement of spectral parameters. Separation of superimpo sed species can be performed in field-swept pulsed EPR by choosing a c onvenient pulse sequence in such a way that species with different rel axation times can be distinctly affected. Computer subtraction between spectra taken under different conditions may lead to better species i dentification, For T-2-based selection, the difference between FID-det ected and long tau echo-detected spectra is used, This technique is su ccessfully applied to the [Rh(CN)(6)](4-) paramagnetic species created by radiation damage in [Rh(CN)(6)](3-) in a KCl host lattice, where s pectra corresponding to different positions of a charge-compensating p ositive-ion vacancy are superimposed. (C) 1997 Academic Press.