2024
DOI: 10.1021/acs.inorgchem.3c03833
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Bromide Ion Impurity-Induced Reaction between Selenium(IV) and Acidic Bromate: Prototype of a Cycle with Autocatalytic Behavior

György Csekő,
Attila K. Horváth

Abstract: The selenium(IV)−bromate reaction in an acidic medium using phosphoric acid/phosphate buffer was investigated by UV−vis spectroscopy monitoring the formation of bromine. In an excess of bromate, the absorbance−time curves measured at 450 nm display a characteristic sigmoidal shape having a fairly long induction period, while in the opposite case, when selenium(IV) species is used in excess, the measured data follow the rise and fall behavior. Depending on the excess of Se(IV) the final brominecontaining produc… Show more

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