Contrasting impact of coordination polyhedra and site symmetry on the electronic energy levels in nine-coordinated Eu(iii) and Sm(iii) crystals structures determined from single crystal luminescence spectra

Abstract

Lanthanide luminescence is characterised by “forbidden” 4f-4f transitions and a complicated electronic structure. Our understanding of trivalent lanthanide(III) ion luminescence is centered on Eu3+ because absorbing and emitting transitions in...