Abstract
We report here the synthesis, structure, luminescence, and magnetic properties of three new cage-like tetranuclear silsesquioxanes (Et 4 N) 2 [(PhSiO 1..5) 8 (Y 0.75 Dy 0.25 O 1.5) 4 (O)(NO 2.5) 6 (EtOH) 2 (MeCN) 2 ] and (Cat) 2 [(PhSiO 1.5) 8 (DyO 1.5) 4 (O)(NO 2.5) 6 (EtOH) 2 (MeCN) 2 ] (Cat=Et 4 N or Ph 4 P). They present a characteristic greenyellow emission. The Y 3+ /Dy 3+ compound displays in addition a field-induced Single Molecule Magnet (SMM) behavior making it the first reported bifunctional magneto-luminescent silsesquioxane.