Room-temperature phosphorescence(RTP)has drawn considerable attention due to its fascinating applications.Herein,we report the achievement of multistimulus responsive RTP by utilizing the cus-tomizable donor-acceptor(...Room-temperature phosphorescence(RTP)has drawn considerable attention due to its fascinating applications.Herein,we report the achievement of multistimulus responsive RTP by utilizing the cus-tomizable donor-acceptor(D-A)metal-organic framework(MOF)platform for charge-transfer(CT)-based triplet state tuning.A succession of elec-tron-rich donors was introduced into the triazine-based electron-deficient framework(NKU-Mg-2)to give D-A MOFs(A1-A3)featuring CT-based emis-sion.Notably,donors are designed and guided by heavy atom effect(-Br)to enhance the spin-orbit coupling,thereby achieving a fine-tuning excited state,resulting in the manipulation of phosphores-cence from low temperature(A1)to room tempera-ture(A2).Moreover,enhanced RTP intensity is further achieved by facilely altering the halogen functionalization(A3).The modulated A3 simulta-neously achieves multiple stimulus responses to X-ray,temperature,and oxygen,rendering it a prom-ising candidate for novel optical sensors.This work not only achieves flexible control over the excited state but also presents a novel approach for devel-oping multistimulus responsive intelligent optical materials.展开更多
基金supported by the National Natural Science Foundation of China(grant nos.22035003,22375104,22371134,22201143)National Key R&D Program of China(grant no.2022YFA1503301)Haihe Laboratory of Sustainable Chemical Transformations(grant no.YYJC202101).
文摘Room-temperature phosphorescence(RTP)has drawn considerable attention due to its fascinating applications.Herein,we report the achievement of multistimulus responsive RTP by utilizing the cus-tomizable donor-acceptor(D-A)metal-organic framework(MOF)platform for charge-transfer(CT)-based triplet state tuning.A succession of elec-tron-rich donors was introduced into the triazine-based electron-deficient framework(NKU-Mg-2)to give D-A MOFs(A1-A3)featuring CT-based emis-sion.Notably,donors are designed and guided by heavy atom effect(-Br)to enhance the spin-orbit coupling,thereby achieving a fine-tuning excited state,resulting in the manipulation of phosphores-cence from low temperature(A1)to room tempera-ture(A2).Moreover,enhanced RTP intensity is further achieved by facilely altering the halogen functionalization(A3).The modulated A3 simulta-neously achieves multiple stimulus responses to X-ray,temperature,and oxygen,rendering it a prom-ising candidate for novel optical sensors.This work not only achieves flexible control over the excited state but also presents a novel approach for devel-oping multistimulus responsive intelligent optical materials.
