Tris[N,N-bis(trimethylsilyl)amide]europium(III) is used as a reactant for Preferential complexation reactions, Pin-wheel shaped heterobimetallis lanthanide alkali metal binaphtholates, It is also used as a reactant for the synthesis of Isostructural neo-pentoxide derivatives of Group 3 and lanthanide series metals for production of Ln2O3 nanoparticles, Anhydrous mononuclear tris(8-quinolinolato)lanthanoid complexes for organic light-emitting devices