2,5-二取代噁唑的研究

RESEARCH ON 2,5-DISUBSTITUTED OXAZOLES

合成了一系列2-苯基和2-取代苯基-5-(4'-联苯基)(口恶)唑化合物,共三十二种。测定了它们的熔点,紫外吸收光谱,荧光发射光谱和激光转换效率。发现其中二十三种化合物在近紫外区有较高的激光转换效率(和PPO相比)。

2-Phenyl-5-(4’-biphenyl)-oxazole and thirty one 2-substituted phe-nyl-5-(4’-biphenyl)-oxazoles are synthesized.Among them,thirty are new compounds.The M.P.,λ_(max)of UV absorption spectra and fluorescence emission spectra,as well as laser properties of the compounds are given in tables.It is found that twenty three of the titled compounds are better than 2,5-diphenyl oxazole(PPO)in using as laser dye in near UV region.A brief discussion on the relation between the substituent effects and spectral properties of the compounds is given.