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Dithiolate-Appended Iridium(III) Complex with Dual Functions of Reducing and Capping Agent for the Design of Small-Sized Gold Nanoparticles

Gihane Nasr, Audrey Guerlin, Frédéric Dumur, Stéphane A. Baudron, Eddy Dumas, Fabien Miomandre, Gilles Clavier, Michel Sliwa, Cédric R. Mayer, J. Am. Chem. Soc. 2011, 133, 6501-6504.

The unprecedented combined reduction of chloroauric acid and capping of the resulting gold nanoparticles in the absence of an external reducing agent are demonstrated using a novel heteroleptic Ir(III) complex incorporating a 4,5-diazafluorenedithiolate ligand. The reduction process in basic medium results from a cascade mechanism involving oxidation of the ligand, reduction of the gold salt, and stabilization and functionalization of the gold nanoparticles.

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Publication

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Paru le 2 mai 2011

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DOI: 10.1021/ja111384m