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本文报道铋(Ⅲ)与不对称变色酸双偶氮衍生物之间的一类特殊反应——β型反应。研究了试剂分子结构与反应性能的关系,着重探讨铋(Ⅲ)与偶氮氯膦-p~N的β型反应行为。在高氯酸介质中,铋(Ⅲ)与上述试剂形成灵敏度很高的稳定β型配合物,λ_(max)=713nm,ε(max)=9.84×10~4L·mol~(-1)·cm~(-1)。并考察了反应酸度、显色剂浓度、有机溶剂(或表面活性剂)、显色温度及显色时间等对反应的影响,测定了α和β型配合物的组成,初步探索了α和β型配合物之间相互转化的规律。
In this paper, we report a kind of special reaction between bismuth (Ⅲ) and asymmetric chromotropic acid disazo derivatives - β-type reaction. The relationship between the molecular structure of reagent and the reaction performance was studied. The β-type reaction behavior between bismuth (Ⅲ) and chlorophosphonazo-p ~ N was discussed. In the perchloric acid medium, bismuth (Ⅲ) forms a stable and sensitive β-type complex with the above reagents, λ max = 713 nm and ε max = 9.84 × 10 4 L · mol -1 cm ~ (-1). The influences of reaction acidity, developer concentration, organic solvent (or surfactant), color temperature and color reaction time on the reaction were investigated. The composition of α and β complexes was determined. The effects of α and β Type complexes between the laws of mutual transformation.