Synthesis and Characterization of a Covalent Porphyrin?Cobalt Diimine?Dioxime Dyad for Photoelectrochemical H ₂ Evolution

The utilization of solar energy via photoelectrochemical cells (PEC) towards hydrogen (H2) production is a promising approach in the field artificial photosynthesis. In this work, synthesis and complete characterization first covalently linked porphyrin-cobalt diimine-dioxime dyad (ZnP-Co) reported. synthetic procedure that was followed based on simple high yielding reactions, without using any noble metal. Photophysical investigation revealed sufficient electronic communication between sensitizer catalyst excited state. Finally, NiO films were sensitized with ZnP-Co H2-evolving activity resulting photocathode assessed. modest performances could be rationalized thanks to photolysis post-operando characterizations system, thus providing some guidelines toward design more efficient porphyrin-based assemblies.