Luminescence spectroscopy of europium(III) and terbium(III) penta-,octa- and nonanuclear clusters with β-diketonate ligands

摘要

A series of Eu(III) and Tb(III) clusters as well as their Y(III) analogues with increasing nuclearities of5, 8 and 9 have been synthesised using 13-diketonate ligands with decreasing steric hindrance. Theirmolecular structures have been established from X-ray diffraction on single crystals for most clustersand studied by luminescence and Raman spectroscopy. The Raman spectra have distinctive patterns foreach nuclearity in accordance with their crystal structure. The luminescence spectra of the Eu(III) andTb(III) clusters also show distinctive features.