铈—邻苯二酚衍生物配合物的氧化显色反应及其机理

对邻苯二酚、邻苯二酚－３，５－二磺酸钠、连苯三酚、３，４－二羟基苯甲酸及３，４－５－三羟基苯甲酸等系列邻苯二酚衍生物笔Ｃｅ＾３＋生成紫红色配合物的反应进行了研究，结果表明，该显色反应是因Ｃｅ＾３＋配合物被氧化成了Ｃｅ＾４＋配合物；提出了Ｃｅ＾３｜与这类试剂氧化显色反应的机理并对其进行了验证实验。

Oxidation Colouring Mechanism of Cerium with Catechol Derivatives

It was found that the colourless complexes of Ce 3 with catechol derivatives can be oxidized to purple Ce 4 coordination compounds in the air. In this paper, the colouring reason and mechanism of the oxidation reaction of Ce 3 complexes in the air have been studied. The study shows that Ce ion is transformed into Ce 4 hydroxy compound by oxygen of air in weak basic condition, and the Ce 4 hydroxy compound oxidizes the anion complexes of Ce 3 with catechol derivatives to radical intermediates, then the intermediates become the purple Ce 4 complexes.