Modulating photoluminescent(PL)materials is crucial for applications such as super-resolution microscopy.The combination of PL materials and photoswitches can achieve this aim by utilizing isomerization of the photosw...Modulating photoluminescent(PL)materials is crucial for applications such as super-resolution microscopy.The combination of PL materials and photoswitches can achieve this aim by utilizing isomerization of the photoswitches.Here we report an optically PL switchable system by mixing carbon quantum dots(CQDs)and diarylethene(DAE)molecular photoswitches.The PL on/off states of CQDs,switched with alternating visible and UV light,achieve a PL on/off ratio of500 and stable reversibility over 20 cycles.The mechanism of our design is revealed by PL lifetime measurements,temperature-dependent PL spectroscopy,and density functional theory(DFT)calculations,confirming that efficient static quenching and the inner filter effect between CQDs and closed DAEs are the keys to achieving such outstanding performance.展开更多
基金support from the National Key Research and Development Program of China(No.2023YFB3609300)the National Natural Science Foundation of China(Nos.62205240 and 12274320)support from the Swedish Foundation for International Cooperation in Research and Higher Education(STINT IB2023-9189)。
文摘Modulating photoluminescent(PL)materials is crucial for applications such as super-resolution microscopy.The combination of PL materials and photoswitches can achieve this aim by utilizing isomerization of the photoswitches.Here we report an optically PL switchable system by mixing carbon quantum dots(CQDs)and diarylethene(DAE)molecular photoswitches.The PL on/off states of CQDs,switched with alternating visible and UV light,achieve a PL on/off ratio of500 and stable reversibility over 20 cycles.The mechanism of our design is revealed by PL lifetime measurements,temperature-dependent PL spectroscopy,and density functional theory(DFT)calculations,confirming that efficient static quenching and the inner filter effect between CQDs and closed DAEs are the keys to achieving such outstanding performance.
