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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Hydrated magnesium cations Mg~+(H_2O)_n, n ≈ 20-60, exhibit chemistry of the hydrated electron in reactions with O _2 and CO_2
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Hydrated magnesium cations Mg~+(H_2O)_n, n ≈ 20-60, exhibit chemistry of the hydrated electron in reactions with O _2 and CO_2

机译:水合镁阳离子Mg〜+(H_2O)_n,n≈20-60,在与O _2和CO_2反应时表现出水合电子的化学性质

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摘要

Ion-molecule reactions of Mg~+(H_2O)_n, n ~≈ 20-60, with O_2 and CO_2 are studied by Fourier-transform ion cyclotron resonance (FT-ICR) mass spectrometry. O _2 and CO_2 are taken up by the clusters. Both reactions correspond to the chemistry of hydrated electrons (H_2O) n-. Density functional theory calculations predicted that the solvation structures of Mg~+(H_2O)_(16) contain a hydrated electron that is solvated remotely from a hexa-coordinated Mg ~(2+). Ion-molecule reactions between Mg~+(H _2O)_(16) and O_2 or CO_2 are calculated to be highly exothermic. Initially, a solvent-separated ion pair is formed, with the hexa-coordinated Mg~(2+) ionic core being well separated from the O_2*- or CO_2*-. Rearrangements of the solvation structure are possible and produce a contact-ion pair in which one water molecule in the first solvation shell of Mg ~(2+) is replaced by O_2*- or CO _2*-.
机译:通过傅里叶变换离子回旋共振(FT-ICR)质谱研究了Mg〜+(H_2O)_n,n〜≈20-60与O_2和CO_2的离子分子反应。 O _2和CO_2被团簇吸收。这两个反应都对应于水合电子(H_2O)n-的化学性质。密度泛函理论计算预测,Mg〜+(H_2O)_(16)的溶剂化结构包含一个水合电子,该水合电子远离六配位的Mg〜(2+)。 Mg〜+(H _2O)_(16)与O_2或CO_2之间的离子分子反应被认为是高度放热的。最初,形成了溶剂分离的离子对,六配位的Mg〜(2+)离子核与O_2 *-或CO_2 *-完全分离。溶剂化结构的重排是可能的,并产生接触离子对,其中Mg〜(2+)的第一溶剂化壳中的一个水分子被O_2 *-或CO _2 *-取代。

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