Issue 14, 2012
From the journal:

Nanoscale

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

Kellen M. Harkness,‡a   Yun Tang,‡b   Amala Dass,c   Jun Pan,d   Nuwan Kothalawala,c   Vijay J. Reddy,c   David E. Cliffel,a   Borries Demeler,e   Francesco Stellacci,b   Osman M. Bakr*d  and  John A. McLean*a  

* Corresponding authors

a Department of Chemistry, Vanderbilt Institute of Chemical Biology, Vanderbilt Institute for Integrative Biosystems Research and Education, Vanderbilt University, 7330 Stevenson Center, Station B 351822, Nashville, TN 37235, USA
E-mail: john.a.mclean@vanderbilt.edu
Tel: +1 615 322 1195

b Institute of Materials, École Polytechnique Fédérale de Lausanne, Switzerland

c Department of Chemistry and Biochemistry, University of Mississippi, Mississippi 38677, USA

d Division of Physical Sciences and Engineering, Solar and Photovoltaics Engineering Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
E-mail: osman.bakr@kaust.edu.sa

e Department of Biochemistry, The University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA

Abstract

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 Ag44(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−.

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

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Article information

DOI
https://doi.org/10.1039/C2NR30773A
Article type
Paper
Submitted
31 Mar 2012
Accepted
04 Jun 2012
First published
15 Jun 2012

Nanoscale, 2012,4, 4269-4274

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

K. M. Harkness, Y. Tang, A. Dass, J. Pan, N. Kothalawala, V. J. Reddy, D. E. Cliffel, B. Demeler, F. Stellacci, O. M. Bakr and J. A. McLean, Nanoscale, 2012, 4, 4269 DOI: 10.1039/C2NR30773A

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