[Eu(bpy)_2]^(3+) (bpy:2,2'-bipyridine) was encapsulated in hexagonalmesoporous materials MCM-41 and HMS. XRD spectra, ICP analysis, IR spectra, N_2 adsorptionmeasurements and the photoluminescence spectra were used to characterize the correspondingimpregnated samples. After the impregnation of [Eu(bpy)_2]^(3+), the BET surface, pore diameters andpore volume of the impregnated samples were decreased. All the impregnated samples exhibited thetypical photoluminescence of Eu^(3+) when excited with a xenon lamp. Compared with the impregnatedHMS, the impregnated MCM-41 samples show higher photoluminescence efficiency for the impregnation of[Eu(bpy)_2]^(3+). It suggests that MCM-41 is a more efficient host for the photoluminescence ofeuropium complexes than HMS.
