Dissociation of Metal Complexes in Mass Transfer across Reversed Micellar Interface and Its Analytical Application

金属配合物在反胶束界面传质中的解离及其分析应用

基本信息

批准号：
12640591
负责人：
FUJIWARA Terufumi
金额：
$ 2.3万
依托单位：
Hiroshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

项目摘要

There has been increased interest in the unique properties of reverse micelles. Further, reverse micelles have been viewed as versatile microreactors in which chemical reactions can be accelerated and shifted into the desired direction. Use of reverse micelles in chemical analysis has received considerable attention. When mixed with reverse micelles, it has been found that some neutral metal complexes are dissociated to serve as a catalyst of a chemiluminescence (CL) reaction ; the metals of the complexes can be transferred selectively across the reversed micellar interface' which is regarded as significant in the uptake process. Despite a considerable amount of information about the structure and properties of reverse micelles, little has been known about the nature and function of the reversed micellar interface where much chemistry occursIn order to obtain the knowledge which contributes to our understanding of the role of the interfacial phase of the reverse micelle and to improvem … More ent of the analytical performance of a method base on the reversed micellar-mediated CL reaction, this research focused on the followings : 1. Solvatochromic shifts of absorption spectra of the porphyrin complexes of zinc(II) and copper(II), which serve as a probe located at the reversed micellar interface, and reversed micellar effects on the coordination equilibria of anions and the structural change of the latter complex ; 2. dissociations of the zinc(II) porphyrin complex and the oxovanadium(IV) complex of acetylacetone in the interfacial phases of the reverse micelles containing acid and base, respectively investigated by using a stopped-flow spectrophotometer ; 3. determination of the magnitude of the coordination effect of the surfactant chloride ion to 1,4,8,11-tetramethyl-1,4,8,11-tetraaza-cyclotetradecanenickel(II) dispersed as a probe in reversed micellar solutions ; 4. development of novel flow-injection methods based on chelate extraction coupled on-line to the reversed micellar mediated CL detection for the selective determination of metals in aqueous samples. Less

此外，人们对反胶束的独特性质越来越感兴趣，反胶束被视为可以加速化学反应并转向所需方向的多功能微反应器。与反胶束混合后，发现一些中性金属配合物解离，作为化学发光（CL）反应的催化剂，配合物中的金属可以选择性地转移穿过反胶束；尽管有大量关于反胶束结构和性质的信息，但人们对发生大量化学反应的反胶束界面的性质和功能知之甚少。这有助于我们理解反胶束界面相的作用，并提高基于反胶束介导的化学发光反应的方法的分析性能，本研究重点关注以下内容： 1.位于反胶束界面的锌(II)和铜(II)卟啉配合物吸收光谱的溶剂化变色位移以及反胶束对阴离子配位平衡和配合物结构变化的影响2. 乙酰丙酮的锌(II)卟啉络合物和氧钒(IV)络合物在含有的反胶束的界面相中的解离3、测定表面活性剂氯离子对1,4,8,11-四甲基-1,4,8,11-四氮杂-的配位作用大小；环十四烯镍（II）作为探针分散在反胶束溶液中；4.开发基于在线耦合到反胶束的螯合物萃取的新型流动注射方法；用于选择性测定水样中金属的介导化学发光检测。