化学学报 ›› 1988, Vol. 46 ›› Issue (2): 187-190. 上一篇    下一篇

研究论文

离子型-非离子型混合表面活性剂对显色反应作用的研究及应用 IV:用显色剂在胶束相的有效介电常数及分配系数探讨反应机理

戚文彬;王耕   

  1. 杭州大学化学系
  • 发布日期:1988-02-15

Studies on the effect of Ionic-Nonionic surfactants on color reaction and its application IV: Distribution coefficients and effective dielectric constants of color reagents in micellar solution

QI WENBIN;WANG GENG   

  • Published:1988-02-15

近年来,将离子型和非离子型混合表面活性剂应用于痕量. 微量金属分析已有一些报道,但对显色反应的机理研究还不多. 我们曾指出混合胶束的形成改变了反应微环境,是产生协同增敏作用的机理之一. 本文以PAR-混合表面活性剂相互作用为例,用超过滤法. 紫外-可见光度法研究了显色剂在混合胶束中分配系数和有效介电常数,并讨论了这些常数与某些体系光度性质的相关性.

关键词: 显色剂, 显色反应, 表面活性, 非离子表面活性剂, 吡啶偶氮间苯二酚, 胶束溶液, 分布函数, 介电常数

The distribution coefficients of PAR and effective dielec. constants of PAR microenvironment in mixed ionic-nonionic surfactant solns. were determine by ultrafiltration and UV-visible spectrophotometric method. The relation between the data and synergic sensitizing effect of mixed ionic-nonionic surfactants on color reaction were deduced. The main causes of synergic sensitizing effect of mixed ionic-nonionic surfactants on color reaction were the synergic enrichment effect of the micelle and the unsym. microenvironment effect on the color complex.

Key words: COLOUR REAGENTS, COLOR REACTION, SURFACE ACTIVITY, NON IONIC SURFACTANTS, PYRIDINE AZO RESORCINOL, MICELLAR SOLUTION, DISTRIBUTION FUNCTION, DIELECTRIC CONSTANT

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