Luminescence behavior of the dibenzoyl methane europium(III) complexes in sol-gel derived host materials

摘要

The luminescence behavior of the dibenzoyl methane europium(III) complexes (Eu(DBM)_3) in sol-gel derived host materials have been investigated. The steady-state excitation and emission spectra and the time-resolved spectra of the 1 % EuCl3 and 3% DBM co-doped gel indicated an efficient ligand-to-metal energy transfer. The Eu(DBM)3 complexes in the gel showed longer ~5D_0 lifetimes in comparison with Eu(DBM)_3 • 3H_2O complexes. The luminescence intensity of the 1% Eucl_3 and 3% DBM co-doped gel decreased continuously with increasing temperature and time of heat treatment, which indicated the gradual decomposition of the Eu(DBM)_3 complexes in the gel during heat treatment.