Intensely and broadly absorbing nanoparticles (IBANs) of silver protected by arylthiolates were recently synthesized and showed unique optical properties, yet question of their dispersity and their molecular formulas remained. Here IBANs are identified as a superatom complex with a molecular formula of Ag-44(SR)(30)(4-) and an electron count of 18. This molecular character is shared by IBANs protected by 4-fluorothiophenol or 2-naphthalenethiol. The molecular formula and purity is determined by mass spectrometry and confirmed by sedimentation velocity-analytical ultracentrifugation. The data also give preliminary indications of a unique structure and environment for Ag-44(SR)(30)(4-).
Type
research article
Web of Science ID
WOS:000305883700036
Authors
Harkness, Kellen M.
•
•
Dass, Amala
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Pan, Jun
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Kothalawala, Nuwan
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Reddy, Vijay J.
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Cliffel, David E.
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Demeler, Borries
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•
Bakr, Osman M.
Publication date
2012
Published in
Volume
4
Start page
4269
End page
4274
Peer reviewed
REVIEWED
Written at
EPFL
EPFL units
Available on Infoscience
July 27, 2012
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