2,5-二取代噁唑的研究(Ⅵ)——2-联苯基-5-苯基噁唑和其5-对位取代苯基衍生物光谱的溶剂效应

Research on 2,5-Disufestituted Oxazoles(Ⅵ)——Solvent Effects on Spectra of 2-p-biphenyl-5-Phenyl Oxazoie and Some of Its 5-p-Substituted Phenyl Derivatives

本文报导了14种2-联苯基-5苯基噁唑和其5-对位取代苯基衍生物在环己烷、无水乙醇和1,4-二氧六环三种溶剂中测得的紫外吸收光谱和荧光发射光谱。并从21种溶剂的宏观物理性质(n,ε),Z值、ET值和取代基常数σp三个方面研究2-联苯基-5-对乙苯基噁唑光谱的溶剂效应。

The UV absorption spectra and fluorescence emission spectra of 2-biphenyl-5-phenyl oxazole and thirteen 5-substituted phenyl derivatives in 3 solvents have been measured.A brief discussion on the relation between the substituent effects and spectra of the compounds is given.The solvent effect on absorption spectra and emission flurescence Spectra of 2-biphenyl-5-(p-ethyl)phenyl Oxazole in 19 solvents has been studied.The results show that the shift of spectra depend not only on the refractive index of the solvent used,but also on its dielectric con-stant therefore the function f(n,ε=n^(2)-1/2n^(2)-1+ε-1/2ε+1) is used instead of the function f(n)and the function f(ε).The results show also that v of UV spectra and FL spectra are function of Z-valuc and RT-value of solvents respectively,and there are correlations betweenσ-values of aromatic solvents and v of spcctras of the compound.