Simple and Efficient Separation of Atomically Precise Noble Metal Clusters

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• 作者：Atanu Ghosh ; Jukka Hassinen ; Petri Pulkkinen ; Heikki Tenhu ; Robin H. A. Ras ; Thalappil Pradeep
• 刊名：Analytical Chemistry
• 出版年：2014
• 出版时间：December 16, 2014
• 年：2014
• 卷：86
• 期：24
• 页码：12185-12190
• 全文大小：338K
• ISSN：1520-6882

文摘

There is an urgent need for accessible purification and separation strategies of atomically precise metal clusters in order to promote the study of their fundamental properties. Although the separation of mixtures of atomically precise gold clusters Au₂₅L₁₈, where L are thiolates, has been demonstrated by advanced separation techniques, we present here the first separation of metal clusters by thin-layer chromatography (TLC), which is simple yet surprisingly efficient. This method was successfully applied to a binary mixture of Au₂₅L₁₈ with different ligands, as well as to a binary mixture of different cluster cores, Au₂₅ and Au₁₄₄, protected with the same ligand. Importantly, TLC even enabled the challenging separation of a multicomponent mixture of mixed-monolayer-protected Au₂₅ clusters with closely similar chemical ligand compositions. We anticipate that the realization of such simple yet efficient separation technique will progress the detailed investigation of cluster properties.