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Anodic Dissolution of Samarium in an Acetonitrile Solution in Acetylacetone

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Abstract

Electrochemical dissolution of metallic samarium is studied in an acetonitrile solution containing 0.1 M tetraethylammonium bromide and 0.9 M acetylacetone. The study is performed in an argon atmosphere, at a constant voltage of 3 V and various ratios between the cathode and anode areas. If the cathode area considerably exceeds the anode area, as a result of anodic oxidation of samarium, ions Sm3+ form in solution, undergo reduction to Sm2+, and 20–25 min later generate chelate complex Sm4(AA)8 · 3HAA, which is insoluble in acetonitrile. Simultaneously, Sm3+ interacts with deprotonated acetylacetone. Chelate complex Sm(AA)3 · HAA is extracted from solution. If the anode area exceeds the cathode area, no reduction of Sm3+ to Sm2+ occurs on the cathode, and eventually adducted samariumtris–acetylacetonate Sm(AA)3 · 4HAA is extracted from solution. The composition of the obtained compounds is confirmed by IR and mass spectrometry, thermogravimetry, isothermic heating, and elemental analysis for metal.

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Authors and Affiliations

  1. Scientific-Research Establishment “Sevchenko Institute of Applied Physical Problems,”, Belarussian State University, ul. Kurchatova 7, Minsk, 220064, Belarus

    N. N. Kostyuk, T. A. Dik, A. G. Trebnikov & V. L. Shirokii

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  1. N. N. Kostyuk
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  2. T. A. Dik
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  3. A. G. Trebnikov
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  4. V. L. Shirokii
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Correspondence to A. G. Trebnikov.

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Kostyuk, N.N., Dik, T.A., Trebnikov, A.G. et al. Anodic Dissolution of Samarium in an Acetonitrile Solution in Acetylacetone. Russian Journal of Electrochemistry 39, 1228–1232 (2003). https://doi.org/10.1023/B:RUEL.0000003450.31333.ba

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