Ligand Substitution Reactions of Technetium and Rhenium Complexes

在过去的一年里，进行了一些研究，以获得控制锝络合物分离和分析的基本参数。在此基础上，研究了锝、锝配合物的配体交换反应.高锝酸盐的光度法测定为了不经还原和配体交换反应而测定高锝酸盐的浓度，建立了一种用硝基苯萃取高锝酸盐与三（1，10-菲咯啉）铁（II）离子对的吸光度测定高锝酸盐的新方法。并对高锝酸盐在水相和有机相中的分配机理进行了探讨.配体交换反应的研究呋喃二肟能与异喹啉形成稳定的配合物，但其组成和结构尚未明确。本文研究了用该方法生成氰尿酸-呋喃二肟配合物的最佳条件， ...更多信息 本文首次研究了在呋喃二肟存在下Sn（Ⅱ）还原过碘酸根的反应，建立了呋喃二肟光度法测定过碘酸根的新方法。此外，通过溶剂萃取行为揭示了该化合物的结构. Tc（Ⅲ）-DTPA配合物的形成机理我们发展了一种以六硫脲锝（Ⅲ）离子为原料合成锝（Ⅲ）配合物的新方法。在这项研究中，Tc（Ⅲ）-DTPA的形成动力学进行了研究，（硫脲）锝（Ⅲ）与DTPA的反应，根据测定的速率常数，建立了反应机理，根据我们对锝的取代反应的认识，我们正在编写一本题为《锝和铼-化学及其应用》的书，本书将于1995年由柏林-海德堡-纽约-东京的Springer-Verlag出版社出版。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