Metal (cadmium and manganese)-mediated assemblies of two acetohydrazide zinc porphyrins for use in supramolecular solar cells

We have successfully organized four metal-mediated assemblies (ZnPx-M-A) based on two acetohydrazide zinc porphyrin bearing two different donor groups (ZnPx, benzimidazyl unit for ZnP1, phenol group for ZnP2) and (E)-4-[(pyridin-4-ylmethylene)amino] benzoic acid ligand (A), wherein the metal ions (M, M = Cd2+ and Mn2+) were used to bridge the ZnPx and A units to attach on the nanostructured TiO2 electrode surfaces. Photoelectrochemical studies reveal significantly improved photovoltaic performance for the assembly ZnP2-Mn-A.