Ag9 quantum cluster through a solid-state route

Rao, Thumu Udaya B. ; Nataraju, Bodappa ; Pradeep, Thalappil (2010) Ag9 quantum cluster through a solid-state route Journal of the American Chemical Society, 132 (46). pp. 16304-16307. ISSN 0002-7863

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Official URL: http://pubs.acs.org/doi/abs/10.1021/ja105495n

Related URL: http://dx.doi.org/10.1021/ja105495n

Abstract

A silver cluster having the composition Ag9(H2MSA)7 (H2MSA = mercaptosuccinic acid) was synthesized in macroscopic quantities using a solid-state route. The clusters were purified by PAGE and characterized by UV-vis, FTIR, luminescence, and NMR spectroscopy, TEM, XPS, XRD, TG, SEM/EDAX, elemental analysis, and ESI MS. The solid-state route provides nearly pure Ag9 clusters, and nanoparticle contamination was insignificant for routine studies. Formation of various clusters was observed by modifying the conditions. The effect of ligands on the synthesis was checked. The cluster decomposed slowly in water, and the decomposition followed first-order kinetics. However, it could be stabilized in solvent mixtures and in the solid state. Such materials may be important in cluster research because of their characteristic absorption profiles, which are similar to those of Au25 and Au38. The cluster showed luminescence with a quantum yield of 8 × 10-3 at 5 °C.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:27310
Deposited On:10 Dec 2010 12:48
Last Modified:05 Mar 2011 06:40

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