In this study,diiodo boron dipyrromethene(BODIPY)is em-ployed as the energy donor and 3,4,9,10-perylene tetracarboxylic di-anhydride(PDA)as the energy ac-ceptor,enabling the synthesis of two new compounds:a BODIPY-pery-lene dyad named P1,and a triad named P2.To investigate the im-pact of the energy donor on the pho-tophysical processes of the system,P1 comprises one diiodo-BODIPY unit and one PDA unit,whereas P2 contains two diiodo-BODIPY moieties and one PDA unit.Due to the good spectral complementarity between di-iodo-BODIPY and PDA,these two compounds exhibit excellent light-harvesting capabilities in the 400-620 nm range.Steady-state fluorescence spectra demonstrate that when preferen-tially exciting the diiodo-BODIPY moiety,it can effectively transfer energy to PDA;when se-lectively exciting the PDA moiety,quenching of PDA fluorescence is observed in both P1 and P2.Nanosecond transient absorption results show that both compounds can efficiently gener-ate triplet excited states,which are located on the PDA part.The lifetimes of the triplet states for these two compounds are 103 and 89 μs,respectively,significantly longer than that of diiodo-BODIPY.The results from the photooxidation experiments reveal that both P1 and P2 demonstrate good photostability and photooxidation capabilities,with P2 showing superi-or photooxidative efficiency.The photooxidation rate constant for P2 is 1.3 times that of P1,and its singlet oxygen quantum yield is 1.6 times that of P1.The results obtained here offer valuable insights for designing new photosensitizers.
Research Project for Outstanding Young People in Universities of Anhui ProvinceChina Postdoctoral Science FoundationNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational University Students'Innovation and Entrepreneurship Training ProgramAnhui Provincial Natural Science FoundationAnhui Provincial Excellent Scientific Research and Innovation Team
NETL
NSTL
万方数据
