The non-ionic europium(Ⅲ) complex [Eu(TTA)3.DAF]·0.5C7H8 (TTA=2-thenoytrifluoroacetonate, DAF=4, 5-diazafluoren-9-one) was synthesized. The structural determiratioa has been carried out. DAF coordination induces the both excitation spectra in the solid state and solution having a red shift and sensitizes Eu3+ luminescence under visible Iight excitation.