We report a photoemission study of the systematics of the 4f electronic structure of a family of rare-earth organic compounds. Resonant photoemission has been used to determine the binding energies of the 4f(N-1) ground states, relative to those of the ligand orbitals, of a number of rare-earth tris-8-hydroxyquinolines (REQ(3)'s). Using an empirical model these results have been extrapolated to the full series (Ce-Lu) of REQ(3)'s. It is found that in all cases, with the possible exception of Ce, the energy of the 4f(N-1) ground state is less than that of the highest occupied molecular orbital, and therefore individual holes on lanthanide sites will not be stable.
Systematics of the 4F energies in a series of rare-earth organic complexes determined by resonant photoemission
CINGOLANI, Roberto;
2004-01-01
Abstract
We report a photoemission study of the systematics of the 4f electronic structure of a family of rare-earth organic compounds. Resonant photoemission has been used to determine the binding energies of the 4f(N-1) ground states, relative to those of the ligand orbitals, of a number of rare-earth tris-8-hydroxyquinolines (REQ(3)'s). Using an empirical model these results have been extrapolated to the full series (Ce-Lu) of REQ(3)'s. It is found that in all cases, with the possible exception of Ce, the energy of the 4f(N-1) ground state is less than that of the highest occupied molecular orbital, and therefore individual holes on lanthanide sites will not be stable.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
