高等学校化学学报 ›› 1981, Vol. 2 ›› Issue (3): 385.

• 研究简报 • 上一篇    下一篇

非离子表面活性剂胶束增溶显色反应机理的研究(Ⅰ)——Ni2+—PAN—TritonX—100体系的分光光度研究

戚文彬   

  1. 杭州大学化学系
  • 收稿日期:1980-02-26 出版日期:1981-08-24 发布日期:1981-08-24

STUDY OF EFFECT OF NONIONIC SURFACTANTS MICELLES ON COLOR REACTIONS-Ⅰ SPECTROPHOTOMETRIC STUDY OF N12+-PAN-TRITON X-100 SYSTEM

Qi Wenbing   

  1. Department of Chemistry, Hangzhou University, Hangzhou
  • Received:1980-02-26 Online:1981-08-24 Published:1981-08-24

摘要: 近年来非离子表面活性剂应用于光度分析日益增多[1],但其胶束增溶显色反应机理的研究,还很少报导[2,3]。本文以分光光度法研究了Ni2+-1-(2-吡啶偶氮)-2-萘酚(PAN)-TritonX-100体系,并与溶剂萃取法进行了比较;同时结合体系的浊点试验、PAN在聚乙二醇和乙醇溶液中的光谱特性等结果,对聚氧乙烯型非离子表面活性剂胶束增溶显色反应的机理,进行了初步讨论。

Abstract: The complexation reaction between niekel(Ⅱ ) and 1-(2-pyridylazo)-2-naphthol (PAN) in the presence of Triton X-100 micelles has been investigated spectrophotometrically by comparison with the results obtained from chloroform extraction method and “cloud point” phase separation method. The characteristic results obtained from these methods are quite agreeable. It is deduced that the Triton X-100 micellar phase plays the same role as the organic solvents for liguid-liguid extraction. However the micellar phase is pseudo-phase and may be regarded as pseudo-phase extraction.On the basis of spectrophotomctric, cloud point and solubility studies, it may be supposed that the phenolic hydroxy group of PAN is bound with the ether oxygen of the oxyethylene group by hydrogen bonding or forming complex with it.The Ni2+-PAN complex and hydrophobic portion of PAN molecule are incorporated into the hydrocarbon interior of the micelle.In the presence of Triton X-100 micelles the apparent stability constant of Ni2+-PAN is larger (K'stab is 5.3×l09 and that of solvent extract Ni2+-PAN system is 2.1×109). But the reaction is not sensitized.

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