Supramolecular assembly of gold nanoparticles (AuNPs) in solution and as composite thin films mediated by halogen bonding interactions and pyridine coordination will be discussed. Time-dependent studies showed that the primary formation of small AuNP aggregates by halogen bonding in solution controls the inner structure of large assemblies. The appearance of the overall hybrid structures can be engineered by varying the concentration of organic linkers. We will also demonstrate the fabrication of integrated and segregated Au/?-Fe2O3binary nanoparticle assemblies. The structural arrangement of these binary assemblies is a function of the capping layer. The use of orthogonal coordination chemistry resulted in the formation of mixed (integrated) assemblies, whereas the use of nanoparticle-ligand coordination or p�p stacking resulted in well-separated domains (segregated assemblies). This formation of segregated assemblies reflects the importance and the use of hierarchical forces for phase-separation with nanoparticles.Figure 1: Halogen bonding as a supramolecular entry for assembling nanoparticles.

Halogen bonding and pyridine coordination as versatile tools for the supramolecular assembly of nanoparticles

248th National Meeting (2014)

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