首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Proton transfer in Th(IV) hydrate clusters: A link to hydrolysis of Th(OH)_2 ~(2+) to Th(OH)_3 ~+ in aqueous solution
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Proton transfer in Th(IV) hydrate clusters: A link to hydrolysis of Th(OH)_2 ~(2+) to Th(OH)_3 ~+ in aqueous solution

机译:Th(IV)水合物簇中的质子转移:水溶液中Th(OH)_2〜(2+)水解为Th(OH)_3〜+的链接

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摘要

Gas-phase reactions of thorium hydroxide cations with water were studied in an ion trap and by density functional theory. The Th(OH)_2 ~(2+) ion adds five inner-shell water molecules. Addition of outer-shell water molecules to produce the Th(OH)_2 ~(2+·)(H 2_O)_(6-8) yields Th(OH)_3 ~(+·) (H_2O)_(0-3) by intracluster proton transfer and elimination of a protonated water cluster, (H_3O)~+(H_2O) _2. Facile hydrolysis of Th(IV) in these small hydrate clusters correlates with solution hydrolysis of Th(OH)_2 ~(2+)(aq) to Th(OH)_3 ~+(aq). The Th(OH)_3 ~+ ion adds up to three inner-shell water molecules. For the other studied Th(IV) singly charged ions, ThO(OH)~+ exothermically hydrolyzes directly to Th(OH)_3 ~+ by addition of a water molecule, ThO(O _2)~+ hydrolyzes to Th(OH)_3 ~+ via nonthermalized Th(OH)_2(O_2)+, and Th(OH) _2(O_2)~+ hydrolyzes to Th(OH)_3 ~(+·)(H_2O) by a sequence that requires exothermic hydration prior to hydrolysis. Computed structures and energetics are in accord with the experimental observations.
机译:通过离子阱和密度泛函理论研究了氢氧化or阳离子与水的气相反应。 Th(OH)_2〜(2+)离子添加了五个内壳水分子。添加外壳水分子以生成Th(OH)_2〜(2 +·)(H 2_O)_(6-8)得到Th(OH)_3〜(+·)(H_2O)_(0-3 ),通过簇内质子转移和消除质子化水簇(H_3O)〜+(H_2O)_2。这些小的水合物簇中Th(IV)的容易水解与Th(OH)_2〜(2 +)(aq)溶液水解为Th(OH)_3〜+(aq)有关。 Th(OH)_3〜+离子最多可添加三个内壳水分子。对于其他研究过的Th(IV)单电荷离子,ThO(OH)〜+通过添加水分子直接放热水解为Th(OH)_3〜+,ThO(O _2)〜+水解为Th(OH)_3 〜+通过非热解的Th(OH)_2(O_2)+,然后Th(OH)_2(O_2)〜+水解成Th(OH)_3〜(+·)(H_2O),其顺序需要在水解前放热。计算的结构和能量学与实验观察一致。

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