Absorption Spectra: The prominent peak at 0.233 (Figure ) oscillation evident in the (440-500)nm wavelength range underscores the substantial chromophoric activity of platinum-doped phenalene, attributable to robust π-π* and metal-to-ligand charge transfer (MLCT) transitions. This resonance indicates that platinum dopants considerably augment the light-harvesting capabilities of the phenalene system, thereby optimizing its interaction with visible light. The introduction of platinum into the molecular framework is likely to strengthen localized surface plasmon resonance (LSPR) effects, thereby amplifying the material's ability to generate photoinduced charge carriers. This property is critical for photophysical applications, as the strong absorption in this range underpins its utility in catalytic systems, particularly in hydrogen evolution reactions (HER).