噁唑类化合物的荧光猝灭及其与四氯化碳组合时所组成的光诱导引发体系

The Fluorescence Quenching of Aromatic Oxazole Derivatives and the Photoinduced Initiative System Composed of These Compounds and CCl_4 for Polymerization

本工作对噁唑类化合物在不同溶剂中的荧光被四氯化碳的猝灭问题进行了研究。发现其荧光猝灭的Stern-Volmer常数与所用溶剂的极性参数E_T(30)值间存在着线性关系,这一结果表明:这一猝灭过程具有明确的电子转移性质。在此工作基础上提出噁唑类化合物与四氯化碳所组成的体系可能是一种新的光诱导引发聚合体系。实验结果表明,这一体系确能光引发单体化合物进行自由基聚合反应,对该体系的光引发聚合机理作了初步的讨论。

The fluorescence quenching of aromatic oxazole derivatives by carbon tetrachloride in different solvents has been studied. It Is found that the Stern-Volmer constants of fluorescence quenching are linearly related with solvent polarity parameter, E_T(30) values. The results indicate that there is a definite charge transfer character in the quenching process. Based on the results described above, it is proposed that the system composed of oxazole and CCl_4 may be a new kind of photoinduced initiative system for polymerization. The experimental results demonstrate this system can initiate monomer polymerization by radical process. The mechanism of photoinduced initiative? polymerization has been discussed preliminarily.