Abstract: Europium quaternary complex was synthesized with dodecyloxy benzoic acid-dibenzoylmethane-1,10-phenanthroline and characterized by EA,FT-IR,HNMR and UV.Eu(III) complex is easy soluble in volatility organic solvents such as chloroform because of introducing long carbon chain cardoxylic acid,which benefits to composite with polymer materials.The Eu(III) complex spectra were excitated by a wavelength with 342 nm,it exhibited a red emissive color and the Eu characteristic peaks are at 592、615 nm,615 nm transiti...