Michael Heaven - Crystal Structure of the Gold Nanoparticle [N(C8H17)4][Au25(SCH2CH2Ph)18]

Version 1

      Publication Details (including relevant citation   information):

      Michael W. Heaven, Amala Dass, Peter S. White, Kennedy M. Holt,   and Royce W. Murray*
        Kenan Laboratories of Chemistry, University of North Carolina,     Chapel Hill, North Carolina 27599-3290  
      J. Am. Chem. Soc., 2008, 130 (12), pp 3754–3755
      DOI: 10.1021/ja800561b
      Publication Date (Web): March 6, 2008
      Copyright © 2008 American Chemical Society


      We report the crystal structure of the thiolate gold nanoparticle   [TOA+][Au25(SCH2CH2Ph)18-],   where TOA+ =   N(C8H17)4+. The   crystal structure reveals three types of gold atoms:  (a) one central gold atom whose coordination number is 12 (12   bonds to  gold atoms); (b) 12 gold atoms that form the   vertices of an icosahedron  around the central atom, whose   coordination number is 6 (five bonds to  gold atoms and one   to a sulfur atom), and (c) 12 gold atoms that are  stellated   on 12 of the 20 faces of the Au13 icosahedron.   The  arrangement of the latter gold atoms may be influenced   by aurophilic  bonding. Together they form six orthogonal   semirings, or staples, of   −Au2(SCH2CH2Ph)3− in   an octahedral arrangement around the Au13 core.

      Address (URL): http://pubs.acs.org/doi/abs/10.1021/ja800561b