is commonly observed for organic donor-acceptor systems. It seems that such synchronicity is missing for doped PNC-RhB system as evident by low concurrent emission of fluorophore and significant decrease in emission of doped PNCs. To account for this observation, we have drawn its similarity with widely reported interactions of metal nanoparticles (such as Au, Ag nanoparticles) with organic fluorophores. The cause of significant photoluminescence quenching of doped PNC can thus be attributed to the specific interaction (such as adsorption, electron transfer) of Rhodamine B with its surface. Moreover, to shed a light on the molecular characteristics of Rhodamine B in solvent toluene, we have performed photophysical studies of Rhodamine B alone in toluene (Figure ). It resolves that RhB starts forming molecular aggregates at its increased concentration signaled by decrease in its fluorescence lifetime. Such ). However, there is no rise-time noticed for Ni:Co:PNC-RhB pair even at 10 M concentration of Rhodamine B (Figure & Table ). Similarly, we have also performed energy transfer studies for Co:PNC-RhB pair (Figure & Table -7).