摘要
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。
A new type, β-type reaction, between bismuth and some unsymmetric bis-arylazo derivatives of chromotropic acid was described. The relationship between the molecular structure of reagents and reaction conditions were studied. The β-type reaction behaviour between bismuth and Chlorophosphonazo-pN was studied in detail. In strong HClO_4 medium, bismuth ion reacts with the reagent to form a sensitive and stable β- type complex with λ max=713nm, ε=9.84×10~4L·mol^(-1)·cm^(-1). The effect of acidity, reagent concentrations, added organic solvents or surfactants, temperature and time on the color reaction were examined. The compositions of α-type and β-type complex were determined respectively. The factors affecting transformation between the two complexes were also studied.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第2期132-137,共6页
Acta Chimica Sinica
