High luminescence quantum yields and long luminescence lifetime from Eu(III) complex containing two crystal water based on a new β-diketonate ligand

New members of family of Eu(III) complex based on the thenoylacetophenone have been synthesized and characterized. The compounds were found for high metal luminescence quantum yields and long luminescence lifetime, especially for compound with two crystal water, corresponding with other compounds containing two crystal water. The result is attributed to high molar absorption coefficients of the Eu(III) complex according to UV–vis and emission spectra. The high molar absorption coefficients balance quenching effect from OH oscillators of water contained in compound.