Effect of underlying Ni(II) porphyrin adlayer on the formation of supramolecular assembly of fullerenes on Au(111) in solution

Highly stable. supramolecular assembled layers with 1:1 composition of C-60 and C-70 fullerenes were found to form on nickel(II) octaethylporphyrin (NiOEP)-modified Au(III) surface, whereas the replacement reaction of the first adlaver of nickel(II) tetraphenyl porphyrin (NiTPP) occurred upon adsorption of fullerene molecules as the second layer. This result shows that supramolecular assemblies of C-60 and C-70 are strongly influenced by the underlying layer of porphyrin. It is demonstrated that the stability of the first adlayer is an important factor in the surface design of host-guest selectivity of fullerenes on electrode surfaces.