Scanning tunneling microscopy investigations of electropolymerized tetra-arylporphyrin complexes

Scanning tunneling microscopy (STM) studies on poly(Zinc-tetraphenylporphyrin) (poly(ZnTPP)) and poly(Zn- or Pt-tetradimethoxyphenylporphyrins) (poly(Zn8OMeTPP) or poly(Pt8OMeTPP)) deposited through anodic oxidation on platinum surfaces are reported. STM investigations on these metalloporphyrin films were conducted to obtain informations on the supramolecular architecture of these polymers. These STM images indicate that poly(ZnTPP) covered the metallic electrode with a layered structure. For poly(Zn8OMeTPP) and poly(Pt8OMeTPP) a tendency to form regular molecular assemblies is obvious.