Simple and Efficient Separation of Atomically Precise Noble Metal Clusters

Atanu Ghosh, Jukka Hassinen, Petri Pulkkinen, Heikki Tenhu, Robin H. A. Ras*, Thalappil Pradeep

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

42 Citations (Scopus)
166 Downloads (Pure)

Abstract

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, Au-25 and Au-144, protected with the same ligand. Importantly, TLC even enabled the challenging separation of a multicomponent mixture of mixed-monolayer-protected Au-25 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.

Original languageEnglish
Pages (from-to)12185-12190
Number of pages6
JournalAnalytical Chemistry
Volume86
Issue number24
DOIs
Publication statusPublished - 16 Dec 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • LIGAND-EXCHANGE REACTIONS
  • PROTECTED GOLD CLUSTERS
  • AU-25 CLUSTERS
  • CRYSTAL-STRUCTURE
  • NANOPARTICLES
  • NANOCLUSTERS
  • FUNCTIONALIZATION
  • NANOMOLECULES
  • CONVERSION
  • STABILITY

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  • Projects

    Metal nanoclusters for fluorescence, catalysis, and heavy metal scavenging

    Huhtamäki, T., Hassinen, J., Vapaavuori, J. & Ras, R.

    01/01/201222/05/2015

    Project: Academy of Finland: Other research funding

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