Issue 9, 2005

Preparation and characterization of gold nanoparticles with a ruthenium-terpyridyl complex, and electropolymerization of their pyrrole-modified metal nanocomposites

Abstract

The reduction of tetrachloroaurate with sodium borohydride in the presence of 2,2′:6′,2″-terpyridyloctanethiol gave terpyridine-functionalized gold nanoparticles (Tpy–Au, core size 2.0 nm). Metal complexation of Tpy–Au with ruthenium-terpyridyl trichloride, Ru(tpy)Cl3, led to new gold nanoparticles bearing the ruthenium-terpyridine complex (Ru–Tpy–Au, core size 5.5 nm) which showed a characteristic MLCT (metal-to-ligand charge transfer) band in the visible region at 483 nm due to the terpyridine-ruthenium complex and a plasmon resonance at ∼510 nm in the UV-vis spectrum. The redox behavior of Ru–Tpy–Au was studied by cyclic voltammetry. Surface modification of metal electrodes was performed by the electropolymerization of pyrrole-functionalized Ru–Tpy–Au nanoparticles (Pyr–Ru–Tpy–Au) which were obtained from the ligand-exchange reaction of Ru–Tpy–Au with ω-(N-pyrrolyl)decanethiol.

Graphical abstract: Preparation and characterization of gold nanoparticles with a ruthenium-terpyridyl complex, and electropolymerization of their pyrrole-modified metal nanocomposites

Article information

Article type
Paper
Submitted
11 Aug 2004
Accepted
25 Nov 2004
First published
05 Jan 2005

J. Mater. Chem., 2005,15, 960-964

Preparation and characterization of gold nanoparticles with a ruthenium-terpyridyl complex, and electropolymerization of their pyrrole-modified metal nanocomposites

M. Ito, T. Tsukatani and H. Fujihara, J. Mater. Chem., 2005, 15, 960 DOI: 10.1039/B412406E

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