Aqueous complexation of thorium(IV), uranium(IV), neptunium(IV), plutonium(III/IV), and cerium(III/IV) with DTPA

Brown M.A.; Paulenova A.; Gelis A.V.

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Aqueous complexation of thorium(IV), uranium(IV), neptunium(IV), plutonium(III/IV), and cerium(III/IV) with DTPA

机译：（IV），铀（IV），n（IV），p（III / IV）和铈（III / IV）与DTPA的水络合

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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 β _(101) = 20.01 ± 0.02, log β _(111) = 22.0 ± 0.2, and log β _(101) = 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 β _(101) = 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 β _(101) = 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.

机译：通过电位法，吸收分光光度法和循环伏安法在1 M离子强度下研究了Th（IV），U（IV），Np（IV），Pu（III / IV）和Ce（III / IV）与DTPA的水络合和25°C。计算了每种三价和四价金属的1：1配合物的稳定性常数。从电位计数据中，我们报告Ce（III）DTPA，Ce（III）HDTPA和Th（IV）DTPA的稳定常数值分别为logβ_（101）= 20.01±0.02，logβ_（111）= 22.0± 0.2和logβ_（101）= 29.6±1。从吸收分光光度法数据中，我们报告了logβ_（101）= 31.8±0.1、32.3±0.1和33.67±0.02的U（IV）DTPA，Np（IV）DTPA和Pu（IV）DTPA的稳定常数。，分别。从循环伏安数据中，我们报告Ce（IV）和Pu（III）的稳定常数分别为logβ_（101）= 34.04±0.04和20.58±0.04。相对于每种阳离子金属的离子半径，比较和讨论了在这项工作中获得的值。

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《Inorganic Chemistry: A Research Journal that Includes Bioinorganic, Catalytic, Organometallic, Solid-State, and Synthetic Chemistry and Reaction Dynamics》 |2012年第14期|共8页
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Brown M.A.; Paulenova A.; Gelis A.V.;
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入库时间 2022-08-19 12:56:47

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Aqueous complexation of thorium(IV), uranium(IV), neptunium(IV), plutonium(III/IV), and cerium(III/IV) with DTPA

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