2016
DOI: 10.1002/chem.201504403
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Advances on the Determination of the Astatine Pourbaix Diagram: Predomination of AtO(OH)2 over At in Basic Conditions

Abstract: It is generally assumed that astatide (At(-) ) is the predominant astatine species in basic aqueous media. This assumption is questioned in non-complexing and non-reductive aqueous solutions by means of high-pressure anion-exchange chromatography. Contrary to what is usually believed, astatide is found to be a minor species at pH=11. A different species, which also bears a single negative charge, becomes predominant when the pH is increased beyond 7. Using competition experiments, an equilibrium constant value… Show more

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Cited by 48 publications
(80 citation statements)
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“…In contrast, formation of astatine as pure At − in reducing media is considerably easier, since only one reduced species of the halogen is accessible . Therefore, it appears preferable to have access to alternative methods of astatination that involve the use of At − .…”
Section: Introductionmentioning
confidence: 96%
“…In contrast, formation of astatine as pure At − in reducing media is considerably easier, since only one reduced species of the halogen is accessible . Therefore, it appears preferable to have access to alternative methods of astatination that involve the use of At − .…”
Section: Introductionmentioning
confidence: 96%
“…13 Most recent literature shows an interest in developing nucleophilic radioiodination approaches for these reasons, with for instance recent reports on the use of arylboron precursors. 14,15 …”
Section: Introductionmentioning
confidence: 99%
“…Further research studies on the inorganic forms of astatine have been carried out more recently by Sergentu et al Detailed measurements on the adsorption and desorption of astatine on ion‐exchange resins and the comparison with iodine led to the proposal of the Pourbaix diagram shown in Figure .…”
Section: Investigations Of Chemical Propertiesmentioning
confidence: 99%