Quenching of luminescence of Eu(fod) 3 (fod = 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5 octanedionate) has been studied in different solvents (i.e., acetonitrile, ethanol, methanol, n-butanol, 2-propanol, bencylic alcohol, chloroform, dichloromethane, 1,1-dichloroethane, 1,2 dichloroethane, carbon tetrachloride, benzene, toluene, m-and p-xilene, acetone, ciclohexanone, methylethylketone, methylpropylketone (iso), fluorobenzene, chlorobenzene, bromobenzene, ethyl ether, dioxane and tetrahydrofurane, and deuterated solvents acetonitrile (d 3), ethanol (d 1), methanol (d 4), benzene (d 6), acetone (d 6) and chloroform (d)). Absorption and emission spectra of the complex in the different solvents, their luminescence lifetimes at room temperature and at the boiling temperature of liquid air, so as in solid phase were measured. Evidences of different mechanisms for quenching of the luminescence is presented and discussed.