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Crystal field effects on the reactivity of aluminum-copper cluster anions

机译:晶体场对铝-铜团簇阴离子反应性的影响

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The limits and useful modifications of the jellium model are of great interest in understanding the properties of metallic clusters, especially involving bimetallic systems. We have measured the relative reactivity of CuAl_n~-clusters (n= 11-34) with O_2. An odd-even alternation is observed that is in accordance with spin-dependant etching, and CuAl_(22)~- is observed as a "magic peak." The etching resistance of CuAl_(22)~- is explained by an unusually large splitting of the 2D~(10) subshell that occurs because of a geometric distortion of the cluster that may also be understood as a crystal field splitting of the superatomic orbitals.
机译:胶体模型的极限和有用的修改对于理解金属团簇的性能非常重要,特别是涉及双金属体系。我们测量了CuAl_n〜-团簇(n = 11-34)与O_2的相对反应性。观察到根据自旋依赖性蚀刻的奇偶交替,并且观察到CuAl_(22)-为“魔术峰”。 CuAl_(22)〜-的耐蚀刻性是由于2D〜(10)子壳的异常大分裂而引起的,该分裂是由于团簇的几何变形而引起的,也可以理解为超原子轨道的晶体场分裂。

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