Abstract: E,E-1,4-bis[2', 2"-(benzoxazolylethenyl)]benzene and thirteen of its substituted derivatives were synthesized.Their m.p., ultraviolet-visible absorption spectra and fluorescence emission spectra, fluorescence quantum yields as well as laser properties were determined.Configurations of these compounds were identified by IRand ¹H NMR.The relationship between optical property and structure was discussed.It was found that E,E-1, 4-bis[2', 2"-(benzoxazolylethenyl)]benzeneand its substituted derivatives possess well photochemical stability and higher laser conversion efficiency than Coumarine-47.The synthesis of 2-methylbenzoxazole and substituted derivatives were also reported.

Key words: Benzoxazole, UV spectrum, FL spectrum, Laser dye