竞争吸收在含金属稳定剂的猝灭机理中的作用

<正> 含重金属原子的光稳定剂的稳定效果常和其光猝灭能力相联系。钱钦文等指出,Ni、Cr、Yb及Eu的整合物能猝灭二乙酮的三重态。Briggs等发现,镍的一系列不同配位体的螯合物可以强烈的猝灭蒽的三重态。有些报告还指出,许多不同配位体的金属螯合物是二苯酮激发态的最佳猝灭剂。但也存在一些相反的结果,如Carlsson等未观

A STUDY ON THE COMPETITION ABSORPTION EFFECT OF METALLO-CONTAINING STABILIZERS IN THE FLUORESCENCE QUENCHING MECHANISM

Photostabilization effect of two metallo-containg compounds have been studied in this note.Both cobalt and nickel containing stabilizers can quench the fluorescence of ter-phenyl and anthracene in suitable wave-length. But in another excited wave-length of aromatic compound, where the absorption intensity of stabilizer can be negligible, the quenching effect of stabilizers disappear. These results indicate that, the fluorescence quenching occured is owing to the absorption competition between aromatic compound and metallo-containg stabilizers.