EMISSION-SPECTRA OF EUROPIUM(III) BETA-DIKETONATE COMPLEXES WITH N-BASES

The emission spectra of several compounds of europium(III) incorporati ng a variety of beta-diketonates and N-bases have been examined in ord er to obtain reliable information relating to coordination number, nat ure of beading and symmetry around the lanthanide ion. It has been fou nd that steric factors may force the polyhedron of coordination toward s geometries less favorable by ligand-ligand repulsion. In general no correlation has been found to exist between the intensity of the hyper sensitive transitions and high or low symmetry.