Novel Interactions of the Charge-Balancing Cations with Framework Defects and Trapped Hydrogen Atoms in Holmium-Exchanged Y Zeolites

摘要

The indirect superhyperfine interaction (ISHFI) between impurity electrons and host nuclei in Van Vleck paramagnets is induced by the large magnetic polarizability of the ground singlet electronic state of the Van Vleck cation. ISHFI effects were observed on neutral, spin S = 1/2 impurities for the first time. They appear in the EPR spectrum of Na-Y zeolite, partially ion-exchanged with exp 165 Ho exp 3+ , which has been dehydrated and gamma -irradiated. (ERA citation 08:041641)