In the 1960’s, gamma irradiation of a Sm(II)-doped KCl lattice afforded UV-visible spectroscopic characterization of Sm(I). This talk will describe the use of a 700 keV <sup>137</sup>Cs source as a method to generate frozen solutions of low oxidation state rare-earth metal ions. Proof of concept reductions in 2-methyltetrahydrofuran glasses with UV-visible and EPR spectroscopic characterization will be presented along with data on rate of formation. The utility of this technique in identifying previously unisolable low oxidation state rare-earth ions will be discussed.

Using gamma irradiation to generate low oxidation state rare-earth species

ACS Spring 2022

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