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The water–iodine oxide system: a revised mechanism for hydration and dehydration

机译：水-碘氧化物系统：水合和脱水的修订机制

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Iodic acids are widely studied in atmospheric and biological applications but their inherent hydrophilic properties introduce complexities that affect their functionality and reactivity. We have shown that iodic acid (HIO3) dehydrates directly into iodine pentoxide (I2O5) in contradiction to the generally accepted multi-step dehydration mechanism where HIO3 dehydrates into HI3O8 first, then dehydrates into I2O5. The generally accepted mechanism is used to determine the concentration of iodic acid by TGA and is only valid for special conditions. The revised mechanism allows for the determination of concentrations of iodic acids under all conditions, and the more specific conditions where the accepted mechanism is valid are shown. The determination of concentration of iodic acid with the revised dehydration mechanism is dependent on assumptions of residual water and initial concentration of HI3O8. The validity of these assumptions is established by studying the absorption and hydration behavior of I2O5 from atmospheric water. These results will have an impact on the handling and use of iodine.
机译：碘酸在大气和生物应用中得到了广泛的研究，但是它们固有的亲水性引入了影响其功能和反应性的复杂性。我们已经表明，碘酸（HIO 3 ）直接脱水成五氧化碘（I 2 O 5 ）与普遍接受的多步脱水机制（HIO 3 脱水成HI ）相反3 O 8 ，然后脱水成I 2 O 5 。公认的机理用于通过TGA测定碘酸的浓度，仅在特殊条件下有效。修改后的机制可以确定所有条件下碘酸的浓度，并显示了接受的机制有效的更具体的条件。修正后的脱水机理测定碘酸的浓度取决于残留水的假设和HI 3 O 8 。这些假设的有效性是通过研究I 2 O 5 在大气水中的吸收和水化行为而建立的。这些结果将对碘的处理和使用产生影响。

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