The efficacy of charge separation and transfer upon photoexcitation is ensured by the small HOMO-LUMO gap . In the context of photocatalysis, the LUMO frequently functions as the acceptor site for photogenerated electrons, thereby facilitating reduction reactions, such as proton reduction in hydrogen evolution. Concurrently, the HOMO can function as the site for holes to drive oxidation reactions. The balance between the narrow gap and the delocalized electronic structure, supported by the N-Pt-N coordination and the conjugated phenalene framework, promotes prolonged exciton lifetimes and reduced electron-hole recombination. This synergy between the electronic structure and the photophysical properties is a critical factor in justifying the model's high photocatalytic potential, particularly for energy-intensive applications like hydrogen evolution.