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Jalalvand AR, Goicoechea HC. Applications of electrochemical data analysis by multivariate curve resolution-alternating least squares. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.01.005] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Abstract
Abstract
Weak complexes between pentavalent and hexavalent actinyl cations have been reported to exist in acidic, non-complexing high ionic strength aqueous media. Such “cation-cation complexes” were first identified in the context of actinide-actinide redox reactions in acidic aqueous media relevant to solvent extraction-based separation systems, hence their characterization is of potential interest for advanced nuclear fuel reprocessing. This chemistry could be relevant to efforts to develop advanced actinide separations based on the upper oxidation states of americium, which are of current interest. In the present study, the chemical behavior of pentavalent uranyl was examined in non-aqueous, aprotic polar organic solvents (propylene carbonate and acetonitrile) to determine whether UO2
+ cations generated at the reducing working electrode surface would interact with the UO2
2+ cations in the bulk phase to form cation-cation complexes in such media. In magnesium perchlorate media, the electrolyte adsorbed onto the working electrode surface and interfered with the uranyl reduction/diffusion process through an ECE (electron transfer/chemical reaction/electron transfer) mechanism. In parallel studies of uranyl redox behavior in tetrabutylammonium hexafluorophosphate solutions, an EC (electron transfer/chemical reaction) mechanism was observed in the cyclic voltammograms. Ultimately, no conclusive electrochemical evidence demonstrated uranyl cation-cation interactions in the non-aqueous, aprotic polar organic solvent solutions, though the results reported do not completely rule out the presence of UO2
+·UO2
2+ complexes.
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Affiliation(s)
- Adam G. Burn
- Department of Chemistry , PO Box 644630 , Washington State University , Pullman , WA 99164-4630, USA
| | - Kenneth L. Nash
- Department of Chemistry , PO Box 644630 , Washington State University , Pullman , WA 99164-4630, USA
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Tu J, Cai W, Shao X. Direct quantitative analysis from the current curve data of pulse voltammetric techniques. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Ghoreishi SM, Khoobi A, Behpour M, Masoum S. Application of multivariate curve resolution alternating least squares to biomedical analysis using electrochemical techniques at a nanostructure-based modified sensor. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.03.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Galceran J, Lao M, David C, Companys E, Rey-Castro C, Salvador J, Puy J. The impact of electrodic adsorption on Zn, Cd and Pb speciation measurements with AGNES. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.03.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Jadreško D, Zelić M. Cyclic multipulse voltammetric techniques. Part I: Kinetics of electrode processes. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2013.08.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Díaz-Cruz JM, Alberich A, Ariño C, Esteban M. Three-dimensional voltammetry assisted by parametric signal fitting: A new perspective for the electrochemical evaluation of metal binding in the presence of electrodic adsorption. Anal Chim Acta 2013; 777:17-24. [DOI: 10.1016/j.aca.2013.03.021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2012] [Revised: 02/26/2013] [Accepted: 03/01/2013] [Indexed: 11/15/2022]
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