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Sequential Dihydrogen Desorption from Hydride-Protected Atomically Precise Silver Clusters and the Formation of Naked Clusters in the Gas Phase
Atanu Ghosh, Mohammad Bodiuzzaman, Abhijit Nag, Madhuri Jash, Ananya Baksi,
Published in American Chemical Society
2017
PMID: 29039910
Volume: 11
   
Issue: 11
Pages: 11145 - 11151
Abstract
We report the formation of naked cluster ions of silver of specific nuclearities, uncontaminated by other cluster ions, derived from monolayer-protected clusters. The hydride and phosphine co-protected cluster, [Ag18(TPP)10H16]2+ (TPP, triphenylphosphine), upon activation produces the naked cluster ion, Ag17 +, exclusively. The number of metal atoms present in the naked cluster is almost the same as that in the parent material. Two more naked cluster ions, Ag21 + and Ag19 +, were also formed starting from two other protected clusters, [Ag25(DPPE)8H22]3+ and [Ag22(DPPE)8H19]3+, respectively (DPPE, 1,2-bis(diphenylphosphino)ethane). By systematic fragmentation, naked clusters of varying nuclei are produced from Ag17 + to Ag1 + selectively, with systematic absence of Ag10 +, Ag6 +, and Ag4 +. A seemingly odd number of cluster ions are preferred due to the stability of the closed electronic shells. Sequential desorption of dihydrogen occurs from the cluster ion, Ag17H14 +, during the formation of Agn +. A comparison of the pathways in the formation of similar naked cluster ions starting from two differently ligated clusters has been presented. This approach developed bridges the usually distinct fields of gas-phase metal cluster chemistry and solution-phase metal cluster chemistry. We hope that our findings will enrich nanoscience and nanotechnology beyond the field of clusters. © 2017 American Chemical Society.
About the journal
JournalData powered by TypesetACS Nano
PublisherData powered by TypesetAmerican Chemical Society
ISSN19360851
Open AccessNo
Concepts (15)
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    Desorption
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    Gases
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    Hydrides
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    Mass spectrometry
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    Monolayers
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    NANOSCIENCE
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    Nanostructured materials
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    Phosphorus compounds
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    AG17H14^+
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    AG17^+
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    Dihydrogen
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    GAS-PHASE CLUSTERS
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    MONOLAYER PROTECTED CLUSTERS
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    NAKED CLUSTERS
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    Ions