Aqueous Complexation of Thorium(IV), Uranium(IV), Neptunium(IV), Plutonium(III/IV), and Cerium(III/IV) with DTPA Public Deposited

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  • Aqueous complexation of Th(IV), U(IV), Np(IV), Pu(III/IV), and Ce(III/IV) with DTPA was studied by potentiometry, absorption spectrophotometry, and cyclic voltammetry at 1 M ionic strength and 25 °C. The stability constants for the 1:1 complex of each trivalent and tetravalent metal were calculated. From the potentiometric data, we report stability constant values for Ce(III)DTPA, Ce(III)HDTPA, and Th(IV)DTPA of log β₁₀₁ = 20.01 ± 0.02, log β₁₁₁ = 22.0 ± 0.2, and log β₁₀₁ = 29.6 ± 1, respectively. From the absorption spectrophotometry data, we report stability constant values for U(IV)DTPA, Np(IV)DTPA, and Pu(IV)DTPA of log β₁₀₁ = 31.8 ± 0.1, 32.3 ± 0.1, and 33.67 ± 0.02, respectively. From the cyclic voltammetry data, we report stability constant values for Ce(IV) and Pu(III) of log β₁₀₁ = 34.04 ± 0.04 and 20.58 ± 0.04, respectively. The values obtained in this work are compared and discussed with respect to the ionic radius of each cationic metal.
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  • Brown, M. A., Paulenova, A., & Gelis, A. V. (2012). Aqueous complexation of thorium(IV), uranium(IV), neptunium(IV), plutonium(III/IV), and cerium(III/IV) with DTPA. Inorganic Chemistry, 51(14), 7741-7748. doi: 10.1021/ic300757k
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  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-08-22T20:29:31Z No. of bitstreams: 1 BrownMAlexChemistryAqueousComplexationThorium.pdf: 374366 bytes, checksum: 6ec15051c02f1b5524d989e7678a5f14 (MD5)
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  • description.provenance : Rejected by Deanne Bruner(deanne.bruner@oregonstate.edu), reason: Needs 1 more subscript 101 in abstract on 2012-08-27T20:55:22Z (GMT)
  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-08-27T20:57:04Z No. of bitstreams: 1 BrownMAlexChemistryAqueousComplexationThorium.pdf: 374366 bytes, checksum: 6ec15051c02f1b5524d989e7678a5f14 (MD5)
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