对苯撑乙烯低聚物光氧化降解研究

五种对苯撑乙烯低聚物的光氧化降解反应表明，给电子基团能促进其光氧化降解，而吸电子基团却能提高它们的光稳定性，这为用分子修饰的方法提高对苯撑乙烯类发光材料的稳定性提供了理论基础。在自敏化和染料敏化的光氧化降解反应中，五种低聚物的降解速率顺序完全一致，意味着单线态氧（1O2）是其光氧化降解反应过程中的主要中间体，ESR自旋捕获实验进一步证实了上述诊断。

Study on Photooxidation Degradation of Phenylenevinylene Oligomers

The rate and mechanism of photooxidative degradation of five phenylenevinylene oligomers were investigated. The degradation rate increases upon the incorporation of electron-donating groups and decreases upon the incorporation of electron-accepting groups on the oligomers, which implied that the stability of phenylenevinylene oligomers could be improved by decoration with electron-accepting groups on them. Singlet oxygen ( 1O 2) as the reactive intermediate in photolysis systems of phenylenevinylene oligomers was directly confirmed by electron spin resonance (ESR) spin trapping experiments.