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The Nature of the Technetium Species Formed During the Oxidation of Technetium Dioxide with Oxygen and Water


Childs, Bradley C; Lawler, Keith V; Braband, Henrik; Mast, Daniel S; Bigler, Laurent; Stalder, Urs; Peterson, Derek R; Jansen, Alek; Forster, Paul M; Czerwinski, Kenneth R; Alberto, Roger; Sattelberger, Alfred P; Poineau, Frederic (2018). The Nature of the Technetium Species Formed During the Oxidation of Technetium Dioxide with Oxygen and Water. European Journal of Inorganic Chemistry, 2018(9):1137-1144.

Abstract

The oxidation of TcO2 with O2 in the presence of H2O at 250 °C was investigated; Tc2O7 and a red product were observed after the reaction. UV/Visible spectroscopy and a cerium titration on the “red” product are consistent with the presence of a reduced Tc species. It is proposed that the “red” product was formed by the hydrolysis of Tc2O7 to HTcO4 followed by the reduction of HTcO4. The reaction products of TcO2 with O2/H2O at 250 °C were also studied by mass spectrometry. The main dinuclear species were Tc2O7 and Tc2O5, while the main mononuclear species were TcO3 and HTcO4. The compound HTcO4 and associated hydrates were simulated to identify candidate structures for the “red” product; however, neither the acid nor any related hydrates exhibited the UV/Visible signature of the “red” product.

Abstract

The oxidation of TcO2 with O2 in the presence of H2O at 250 °C was investigated; Tc2O7 and a red product were observed after the reaction. UV/Visible spectroscopy and a cerium titration on the “red” product are consistent with the presence of a reduced Tc species. It is proposed that the “red” product was formed by the hydrolysis of Tc2O7 to HTcO4 followed by the reduction of HTcO4. The reaction products of TcO2 with O2/H2O at 250 °C were also studied by mass spectrometry. The main dinuclear species were Tc2O7 and Tc2O5, while the main mononuclear species were TcO3 and HTcO4. The compound HTcO4 and associated hydrates were simulated to identify candidate structures for the “red” product; however, neither the acid nor any related hydrates exhibited the UV/Visible signature of the “red” product.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:2018
Deposited On:07 Sep 2018 11:02
Last Modified:08 Sep 2018 07:30
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:1434-1948
OA Status:Closed
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1002/ejic.201701199

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