Gold cored dendrimers

Figure 3.13 Synthesis of gold nanoparticle-cored dendrimers using Frechet-type dendrons.

Ratheesh Kumar, V. K. and K. R. Gopidas. Synthesis and characterization of gold-nanoparticle-cored dendrimers stabilized by metal-carbon bonds. Chem. Asian. J. 5, 2010 887-896. 

Figure 7.26 Dendrimers made with a disulfide-containing core can be reduced to produce dendrons having free thiol groups for surface modification. Dative binding of these thiol-dendrons to gold or metallic surfaces can provide a high density of amine groups for coupling proteins or other molecules.

Finally, ferrocenyl units have been incorporated into the perimeter of dcndrimcric polymers by Astruc and coworkers.40 Gold nanoparticles form the core of the dendrimers, with the branched units with terminal ferrocene units coordinated to the gold surface via... 

C. Gold-Nanoparticle-Cored Ferrocenyl Dendrimers and Modification of Electrodes for the Fabrication of Useful Sensors... 

Clusters of metals are also cores for the assembly of dendrimers which show electrochemical and biomimetic properties [63, 64], A peculiar case is represented by the stabilization of gold nanoparticles with sulfur containing dendritic ligands which provide the control of nano-architecmre dimensions for stable assemblies [65]. 

Although many of the surface dendrimer amines are occluded by the gold or quantum dot nanoparhcles, silica condensahon still occurs. In fact, the CdSe/ZnS core shell quantum dots with negahvely charged surface carboxylates were encapsulated with 99% efficiency, which suggests that the electrostatic attraction between the quantum dots and the templates was sufficient for encapsulation of these materials [69]. 

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