Ag44(SR)304-: A silver-thiolate superatom complex

Kellen M. Harkness, Yun Tang, Amala Dass, Jun Pan, Nuwan Kothalawala, Vijay J. Reddy, David E. Cliffel, Borries Demeler, Francesco Stellacci, Osman M. Bakr, John A. McLean

Research output: Contribution to journalArticlepeer-review

148 Scopus citations


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)304- 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 Ag44(SR)304-.

Original languageEnglish
Pages (from-to)4269-4274
Number of pages6
Issue number14
StatePublished - Jul 21 2012


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