Natural photosynthetic systems utilize complex pigment-protein assemblies for light harvesting across a broad spectral range from UV to near-infrared, enabling efficient photogeneration and charge separation. Conventional photocatalysts, however, primarily absorb UV (<
380 nm) and visible light (380-780 nm), resulting in suboptimal spectral utilization. This study introduces a semi-organic artificial photosynthetic system that integrates molecularly engineered phenoxazinone derivatives with H-doped rutile TiO