Synthesis and characterization of luminescent Eu(HMAP)3·2H2O and Tb(HMAP)3·2H2O complexes

The novel complexes Eu(HMAP)3·2H2O and Tb(HMAP)3·2H2O (where HMAP = 2′-hydroxy-4′-methoxyacetophenone) are synthesized and characterized by infra red spectroscopy, 1H NMR spectroscopy, TGA/DTA, SEM and elemental analysis. The qualitative analysis of the complexes to detect the presence of rare earth (Eu, Tb), have been performed by energy dispersive analysis (EDX). The Eu(HMAP)3·2H2O on excitation at 354 nm emits bright red luminescence with main peak at 612 nm and Tb(HMAP)3·2H2O on excitation at 354 nm emits bright green luminescence with main peak at 547 nm. The luminescence intensity of Eu(HMAP)3·2H2O is higher than Tb(HMAP)3·2H2O. These complexes emitting red and green luminescence might be used to make the electroluminescent (EL) devices for display applications.