Plutonium(IV) mononitrate and dinitrate complex formation in acid solutions as a function of ionic strength
Plutonium(IV) mononitrate and dinitrate complex formation in acid solutions as a function of ionic strength
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酸溶液中钚(IV)单硝酸盐和二硝酸盐络合物的形成与离子强度的关系
DOI：
10.1007/bf02385932
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发表时间：
1998
影响因子：
1.6
通讯作者：
Coleman A. Smith
中科院分区：
文献类型：
--
作者：
John M. Berg;D. Veirs;R. Vaughn;M. Cisneros;Coleman A. Smith
在离子强度为2~19摩尔的HClO4水溶液中，用可见光和近红外吸收光谱滴定Pu(IV)。在可见光和近红外光谱范围内，Pu_5f-5f光谱随络合物的形成而变化。在每个离子强度下，通过改变硝酸盐浓度获得了一系列光谱。每个系列被解卷积成Pu~(4+)(AQ)、Pu(NO_3)_3、−和Pu(NO_3)_(22+)络合物的光谱，同时测定了它们的形成常数。在对硝酸的不完全解离进行校正后，利用特定离子相互作用理论的公式，可以用两个参数β0和Δε来描述每个生成常数的离子强度依赖关系。
Titrations of Pu(IV) with HNO3 in a series of aqueous HClO4 solutions ranging in ionic strength from 2 to 19 molal were followed using visible and near-infrared absorption spectrophotometry. The Pu 5f-5f spectra in the visible and near IR range change with complex formation. At each ionic strength, a series of spectra were obtained by varying nitrate concentration. Each series was deconvoluted into spectra of Pu4+ (aq), Pu(NO3)3− and Pu(NO3)22+ complexes, and simultaneously their formation constants were determined. When corrected for the incomplete dissociation of nitric acid, the ionic strength dependence of each formation constant can be described by two parameters, β0 and Δε using the formulae of specific ion interaction theory.