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Advances in Materials Science and Engineering
Volume 2013 (2013), Article ID 548284, 6 pages
http://dx.doi.org/10.1155/2013/548284
Research Article

Fluorescent Thiol-Derivatized Gold Clusters Embedded in Polymers

1Institute for Composite and Biomedical Materials, National Research Council, Piazzale E. Fermi 1, 80055 Portici, Italy
2Istituto Nazionale di Ottica, CNR, Via Campi Flegrei 34, 80078 Pozzuoli, Italy
3INFN Sezione di Napoli, Complesso Universitario di M.S. Angelo, Via Cinthia, 80126 Napoli, Italy
4Department of Material Engineering and Production, University of Naples “Federico II”, Piazzale Tecchio 80, 80125 Naples, Italy

Received 9 April 2013; Accepted 28 May 2013

Academic Editor: Vladimir Tsukruk

Copyright © 2013 G. Carotenuto et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Owing to aurophilic interactions, linear and/or planar Au(I)-thiolate molecules spontaneously aggregate, leading to molecular gold clusters passivated by a thiolate monolayer coating. Differently from the thiolate precursors, such cluster compounds show very intensive visible fluorescence characteristics that can be tuned by alloying the gold clusters with silver atoms or by conjugating the electronic structure of the metallic core with unsaturated electronic structures in the organic ligand through the sulphur atom. Here, the photoluminescence features of some examples of these systems are shortly described.