photophysical insights on quantum dots-zinc porphyrazine system studied in solution

Abstract The present study reports spontaneous interaction of a quantum dots, namely, CdSxSe1-x/ZnS (QD) with zinc porphyrazine (1) in toluene. It is observed from steady state fluorescence measurements that photoluminescence of QD suffers quenching by 1. Time resolved fluorescence measurements reveal small change in the lifetime of QD (16.10 ns) following it interaction with 1 (15.77 ns). The magnitude of kq for QD-1 system, i.e., kq ​= ​5.25 ​× ​1012 ​L⋅mol−1⋅sec−1 (evaluated from the stern-volmer plot) establishes that photoexcited QD undergoes decay by 1 according to static quenching mechanism. The results emerging from above study confirm that QD-1 system may be judiciously applied as an energy storage material in near future.