2,7-Bis(diphenylamine)-spiro[fiuorene-7,9-benzofluorene] (DDSF) was successfully designed and synthesized. Its structure was determined by ¹H NMR, MS, IR and elemental analysis. The yield of each step was over 70%. Optoelectronic properties were investigated by UV-Vis absorption spectra and fluorescence emission spectra. The results suggest that the maximum peak was red-shifted about 40 nm in solid state. However, the fluorescence emission spectra in solution and photoluminescence quantum yield were performed obviously difference along with the polarity of solvent. By cyclic voltammeter measurement and the gap calculated, the HOMO and LUMO energies of DDSF are －5.10 and －2.95 eV, respec-tively.

Key words: arylamine spirofluorene, synthesis, optoelectronic property, blue light-emitting material