Metal-core-organic shell dendrimers as unimolecular micelles

Gopidas, K. R. ; Whitesell, James K. ; Fox, Marye Anne (2003) Metal-core-organic shell dendrimers as unimolecular micelles Journal of the American Chemical Society, 125 (46). pp. 14168-14180. ISSN 0002-7863

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Official URL: http://pubs.acs.org/doi/abs/10.1021/ja036626h

Related URL: http://dx.doi.org/10.1021/ja036626h

Abstract

The synthesis and characterization of nanoparticle-cored dendrimers (NCDs), consisting of a metal core capped by arylpolyethers terminated with ester or carboxylate groups, are reported. These NCDs, comprising nanometer-sized gold clusters at the core and organic dendrons radially connected to the gold core by gold-sulfur bonds, were analyzed by TEM, TGA, UV, IR, and NMR spectroscopies. The density of the branching units connected to the core decreased from 1.90/nm2 for a first-generation NCD (Au-G1(CO2Me)) to 0.80/nm2 for a fourth-generation NCD (Au-G4(CO2Me)). Although the ester-terminated NCDs were stable and resisted aggregation, they were easily hydrolyzed to the corresponding water-soluble sodium salts. Aqueous solutions of (Au-Gn(CO2Na)) exhibited micellar properties. Since these NCDs possess a relatively unpassivated metal core and an organic aryl ether shell with micellar and dendritic properties, they are expected to have important potential applications in catalysis.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:62062
Deposited On:16 Sep 2011 04:08
Last Modified:16 Sep 2011 04:08

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