Comparative electrochemistry of technetium(V) and rhenium(V) dioxo complexes |
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| Authors: | C Kremer S Domínguez M Pérez-Sánchez A Mederos E Kremer |
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| Institution: | (1) Facultad de Química, Cátedra de Química Inorgánica, CC 1157 Montevideo, Uruguay;(2) Departamento de Química Inorgánica, Universidad de La Laguna, 38204 La Laguna, Tenerife, Canary Islands, Spain;(3) Departamento de Química-Física, Universidad de La Laguna, 38204 La Laguna, Tenerife, Canary Islands, Spain |
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| Abstract: | The heavy use of99mTc in nuclear medicine and the recent development of188Re radiopharmaceuticals have encouraged the comparative study of Tc and Re coordination compounds. In this work, the electrochemistry of MVO2 (amine)2]+ (M=Tc, Re; amine = ethylenediamine, 1,3-diaminopropane, diethylenetriamine, triethylenetetramine) complexes is studied by cyclic voltammetry and the results are compared. The voltammograms of these compounds, obtained at different pH values, show that ReO2(amine)2]+ cations are thermodynamically stable even when protonated. On the other hand, analogous Tc compounds are not so stable and easily decompose if existing as TcO(OH) (amine)2]2+. |
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