This paper is devoted to study of the luminescent properties of the adducts of Eu(III) tris-β-diketonates and 1,10-phenanthroline adsorbed on aerosils as a promising fluorescent nanoparticles. It was shown that the luminescent spectroscopy could be used as the probe for analysis of the state of adsorbed molecules. Formation of a uniform monolayer on aerosils was revealed in some cases, while in others a polymolecular adsorption and a formation of surface associates were discovered.