The unshifted absorbance spectra of CPB NCs in the composite indicated the preservation of their structural integrity. To investigate charge transfer within the composite, photoluminescence (PL) studies were conducted, revealing an impressive 92% PL quenching, signifying highly efficient charge transfer between CPB NCs and ZIF-8. Additionally, electron paramagnetic resonance (EPR) analysis provided deeper insights into charge dynamics, demonstrating enhanced radical generation, particularly of hydroxyl radicals (•OH). This finding highlights not only efficient charge transfer but also superior charge separation,