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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Solvation of Silver Ions in Noble Gases He, Ne, Ar, Kr, and Xe
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Solvation of Silver Ions in Noble Gases He, Ne, Ar, Kr, and Xe

机译：贵族气体中的银离子的求解，Ne，Ar，Kr和xe

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摘要

We use a novel technique to solvate silver cations in small clusters of noble gases. The technique involves the formation of large, superfluid helium nanodroplets that are subsequently electron ionized, mass-selected by deflection in an electric field, and doped with silver atoms and noble gases (Ng) in pickup cells. Excess helium is then stripped from the doped nanodroplets by multiple collisions with helium gas at room temperature, producing cluster ions that contain no more than a few dozen noble gas atoms and just a few (or no) silver atoms. Under gentle stripping conditions, helium atoms remain attached to the cluster ions, demonstrating their low vibrational temperature. Under harsher stripping conditions, some of the heavier noble gas atoms will be evaporated as well, thus enriching stable clusters of Ng(n)Ag(m)(+) at the expense of less stable ones. This results in local anomalies in the cluster ion abundance, which is measured in a high-resolution time-of-flight mass spectrometer. On the basis of these data, we identify specific "magic" sizes n of particularly stable ions. There is no evidence, however, for enhanced stability of Ng(2)Ag(+), in contrast to the high stability of Ng(2)Au(+) that derives from the covalent nature of the bond for heavy noble gases. "Magic" sizes are also identified for Ag-2(+) dimer ions complexed with He or Kr. Structural models will be tentatively proposed. A sequence of magic numbers n = 12, 32, and 44, indicative of three concentric solvation shells of icosahedral symmetry, is observed for HenH2O+.
机译：我们使用一种新技术来溶剂化银阳离子在小型惰性气体中。该技术涉及形成大型超氟氦纳米杆，随后通过电场中的偏转而被电离，质量块，并在拾取细胞中掺杂有银原子和惰性气体（Ng）。然后通过在室温下与氦气的多个碰撞从掺杂的纳米辊中剥离过量的氦，产生含有不超过几十个惰性气体原子的簇离子，只有几（或不）银原子。在温和的汽提条件下，氦原子保持连接到簇离子，证明其低振动温度。在Harsher剥离条件下，一些较重的惰性气体原子也将蒸发，从而富含稳定的Ng（N）（+）的稳定簇，以牺牲更稳定的稳定性。这导致簇离子丰度中的局部异常，其在高分辨率飞行时间质谱仪中测量。在这些数据的基础上，我们确定了特别稳定的离子的特定“魔法”尺寸。然而，对于增强Ng（2）Ag（+）的增强稳定性，与Ng（2）Au（+）的高稳定性产生了来自粘合剂的共价性质的高惰性气体的高稳定性。还鉴定出与HE或KR复合的Ag-2（+）二聚体离子的“魔法”尺寸。暂时提出了结构模型。对于HENH2O +，观察到指示ICOSAHEDRAL对称性的三个同心溶剂化壳的魔号N = 12,32和44序列。

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