一、引言三元络合物系指由三个组分所形成的单核或多核的混合配位络合物。通常由一个中心离子和两个配位体或两种金属和一个配位体所形成。所以更恰当些,应称为混合型络合物或异配位络合物。三元络合物在络合物化学中是一个新的领域。近年来在分析化学,特别是在分光光度法中的应用,得到迅速的发展,这主要由于: 1.应用三元络合物的方法一般具有较高的灵敏度:例如,在金属的有色络合物中加入鎓碱,灵敏度往往可提高几倍,这是目前提高显色 I. INTRODUCTION Ternary complexes are mononuclear or polynuclear mixed coordination complexes formed from three components. Usually formed by a central ion and two ligands or two metals and a ligand. So more appropriate, should be referred to as mixed complexes or hetero-coordination complexes. Ternary complexes are a new area in complex chemistry. In recent years there has been rapid development in analytical chemistry, especially in spectrophotometry, mainly due to: 1. The method of applying ternary complexes generally has higher sensitivity: for example, in the colored complexation of metals Add onium base material, the sensitivity can often be increased several times, which is to improve the color