Ligand Substitution Reactions of Technetium and Rhenium Complexes

在过去的一年中，进行了几项研究，以获得控制锝配合物分离和分析的基本参数。在此基础上，研究了锝、铼配合物的配体交换反应。光度法测定高铁酸盐的浓度为了测定不发生还原和配体交换反应的高铁酸盐浓度，建立了一种测定萃取到硝基苯中的高铁酸盐与三（1,10-菲罗啉）铁离子对吸光度的新方法。此外，还研究了高技术酸盐在水相和有机相之间的分布机理。铼-呋喃二肟配合物的配体交换反应已知呋喃二肟能与铼形成稳定的配合物，但该配合物的组成和结构尚未明确。本文首次考察了在呋喃二肟存在下，用Sn （II）还原过透酸盐的最佳条件，并建立了呋喃二肟分光光度法测定铼的方法。此外，铼配合物的溶剂萃取行为揭示了其结构。Tc (III)-DTPA配合物的形成机理研究了以六（硫脲）锝（III）离子为原料合成锝（III）配合物的新方法。本文采用分光光度法研究了六（硫脲）锝（III）与DTPA反应形成Tc (III)-DTPA的动力学。利用测定的速率常数，建立了反应机理。根据我们对锝取代反应的了解，我们正在准备一本题为“锝和铼化学及其应用”的书，在“当代化学主题”系列中。这本书将于1995年由施普林格出版社、柏林-海德堡-纽约-东京出版。少

In the previous year, several studies were done to obtain the fundamental parameters governing the separation and analysis for technetium complexes. Based on these results, the ligand exchange reaction of technetium and rhenium complexes were investigated.1. Photometrical determination of pertechnetateIn order to determine the concentration of pertechnetate without reduction and ligand-exchange reaction, a new method that the absorbance of an ion-pair of pertechnetate with tris (1,10-phenanthroline) iron (II) extracted into nitrobenzene can be measured has been established. Furthermore, the distrebution mechanism of pertechnetate between the aqueous and organic phases was examined.2. Ligand exchange reaction of rhenium-furildioxime complexIt is known that furildioxime can form a stable complex with rhenium, but the composition and structure of the complex has not yet been clarified. In the present study, the optimum condition for the formation of rhenium-furildioxime complex by the pro … More cedure of reduction of perrhenate with Sn (II) in the presence of furildioxime was first examined and the spectrophotometric determination of rhenium with furildioxime could be established. In addition, the solvent extraction behavior of the rhenium comlex revealed its structure.3. Mechanism of the formation of Tc (III)-DTPA complexWe have developed a new method for the synthesis of technetium (III) complexes using hexakis (thiourea) technetium (III) ion as a starting material. In this study, the formation kinetics of Tc (III)-DTPA was investigated spectrophotometrically by the reaction of hexakis (thiourea) technetium (III) with DTPA.Using the rate constants determined, the reaction mechanism was established.On the basis of our knowledge on the substitution reactions of technetium, we are preparing a book entitled "Technetium and Rhenium-Chemistry and Its Applications" , in the series of TOPICS IN CURRENT CHEMISTRY.The book will be published by Springer-Verlag, Berlin-Heiderberg-New York-Tokyo in 1995. Less