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Artigo Acesso aberto Revisado por pares
BIBTEX RIS

Ag44(SR)304−: a silver–thiolate superatom complex

2012; Royal Society of Chemistry; Volume: 4; Issue: 14 Linguagem: Inglês

10.1039/c2nr30773a

ISSN

2040-3372

Autores

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,

Tópico(s)

Advanced Nanomaterials in Catalysis

Resumo

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-).

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