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Preparation of gas phase naked silver cluster cations outside a mass spectrometer from ligand protected clusters in solution
Madhuri Jash, Atanu Ghosh, Depanjan Sarkar, Mohammad Bodiuzzaman, Pallab Basuri, Ananya Baksi,
Published in Royal Society of Chemistry
2018
PMID: 30094450
Volume: 10
   
Issue: 33
Pages: 15714 - 15722
Abstract
Gas phase clusters of noble metals prepared by laser desorption from the bulk have been investigated extensively in a vacuum using mass spectrometry. However, such clusters have not been known to exist under ambient conditions to date. In our previous work, we have shown that in-source fragmentation of ligands can be achieved starting from hydride and phosphine co-protected silver clusters leading to naked silver clusters inside a mass spectrometer. In a recent series of experiments, we have found that systematic desorption of ligands of the monolayer protected atomically precise silver cluster can also occur in the atmospheric gas phase. Here, we present the results, wherein the [Ag 18 H 16 (TPP) 10 ] 2+ (TPP = triphenylphosphine) cluster results in the formation of the naked cluster, Ag 17 + along with Ag 18 H + without mass selection, outside the mass spectrometer, in air. These cationic naked metal clusters are prepared by passing electrosprayed ligand protected clusters through a heated tube, in the gas phase. Reactions with oxygen suggest Ag 17 + to be more reactive than Ag 18 H + , in agreement with their electronic structures. The more common thiolate protected clusters produce fragments of metal thiolates under identical processing conditions and no naked clusters were observed. © 2018 The Royal Society of Chemistry.
About the journal
JournalData powered by TypesetNanoscale
PublisherData powered by TypesetRoyal Society of Chemistry
ISSN20403364
Open AccessNo
Concepts (16)
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    Desorption
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    Electronic structure
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    Gases
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    Mass spectrometers
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    Mass spectrometry
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    Phosphorus compounds
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    Silver
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    Ambient conditions
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    GAS-PHASE CLUSTERS
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    LASER DESORPTION
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    MASS SELECTION
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    Metal cluster
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    Processing condition
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    SILVER CLUSTER
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    Triphenyl phosphines
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    Ligands