有机试剂的分子结构与胶束增敏的关系——TAMB和BTAMB的比较研究

Study of the Relationship Betweeu the Structure of Organic Reagent and Surfactant Sensitized Color Reactions

本文以TAMB和BTAMB为探针试剂,考查了有表面活性剂胶束存在时有机试剂的亲水-疏水程度对金属-有机试剂配合物增敏效应的影响。研究了两体系的光度性质,显色剂及镍-显色剂配合物在各不同胶束中的分配情况,并用析相、核磁共振、萃取及动力学试验等手段比较了两个试剂及配合物的特点和差异。结果表明,试剂的“两亲”结构对配合物能否被增敏至关重要,而试剂憎水性或亲水性过强,均不利于配合物被增敏,仅当具有“两亲”结构时,配合物同时感受胶束“刚性不对称微环境”中两端不同作用力,配合物才会有较大增敏现象出现。

In this paper, comparing the Ni(Ⅱ)-TAMB system with Ni(Ⅱ)-BTAMB system, as an example, we study the effect of hydrophobicity-hydrophilicity of color reagents on the surfactant sensitized reactions, the photometric characters of the two systems, the distribution of color reagents and the nickel complexes between water and surfactant micelles. By means of NMR, phase seperation, extraction and dynamic study, the differences and speciality of the two systems were observed. It is shown that the hydrophobic and hydrophilic structure of the reagents plays an important role in the surfactant sensitized reactions. If too strong hydrophilic or hydrophobic reagents (or the complexes) were used, low micellar sensitized effect would be found in the system.