Monofunctionalized gold nanoparticles stabilized by a single dendrimer form dumbbell structures upon homocoupling.
The assembly of dumbbell structures as organic-inorganic hybrid materials is presented. Gold nanoparticles (NPs) with a mean diameter of 1.3 nm were synthesized in very good yields using a stabilizing dendrimer based on benzylic thioether subunits. The extended dendritic ligand covers the NP surface and contains a peripheral protected acetylene, providing coated and monofunctionalized NPs. These NPs themselves can be considered as large molecules, and thus, applying a wet-chemical deprotection/oxidative acetylene coupling protocol exclusively provides dimers of NPs interlinked by a diethynyl bridge. The concept not only enables access to novel organic/inorganic hybrid architectures but also promises new approaches in labeling technology.
Department of Chemistry, University of Basel, St. Johanns-Ring 19, CH-4056 Basel, Switzerland.
Jens Peter
JP
Hermes
Fabian
F
Sander
Ulrike
U
Fluch
Torsten
T
Peterle
Damien
D
Thompson
Raphael
R
Urbani
Thomas
T
Pfohl
Marcel
M
Mayor