A highly pure red luminescent europium(III) complex with a Schiff base zinc(II) complex as a neutral ligand

A highly pure red luminescent heterobimetallic complex [EuZnL(tta)(2)(mu-tfa)] (L = N,N'-bis(salicylidene)-2,3-propanediamine, tta = 2-thenoyltrifluoroacetonate, tfa = trifluoroacetate) was synthesized. The EL device with this complex exhibits an inspiring current efficiency of 3.7 cd A(-1) at a brightness of 300 cd m(-2) and gives a maximum Eu(III)-based pure red emitting luminance of 1982.5 cd m(-2) at 13.8 V.