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您的检索式：作者名="Lingchen Meng"
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| 1 | Covalent organic hollow nanospheres constructed by using AIEactive units for nitrophenol explosives detection显示文摘The development of conjugated nanomaterials with high sensitivity and super-amplified quenching effect for the detection of nitrophenol explosives is still a great challenge. Herein, we developed conjugated hollow nanospheres constructed by using aggregation-induced emission(AIE) active 1,3,5-tris(4-formyl-phenyl)benzene(TFPB). The high emission hollow nanospheres with uniform size and admirable dispersiveness exhibited obvious fluorescence quenching response with the addition of nitrophenol explosives owing to the photoinduced electron transfer(PET) from the hollow nanospheres to nitrophenol explosives. The Stern-Volmer constants of hollow spheres for 2,4,6-trinitrophenol(TNP), 4-nitrophenol(NP) and 2,4-dinitrophenol(DNP) can reach 9.67×10^5, 3.14×10^5 and 4.8×10^4 M-1, respectively. Furthermore, the handy test paper coated with hollow nanospheres was prepared and showed a good response toward TNP solutions and vapor. The study provides a novel strategy to construct AIE-active conjugated hollow nanospheres for efficient nitrophenol explosives sensing. | Shan Jiang Shengda Liu Lingchen Meng Qingkai Qi Lipeng Wang Bin Xu Junqiu Liu Wenjing Tian | 2020 | Science China Chemistry2020，63，4： | 0 |
| 2 | Morphology controllable conjugated network polymers based on AIE-active building block for TNP detection显示文摘Luminescent conjugated network polymer is one of the most promising chemo-sensors owing to their good chemical/optical stability and multiple functionalization.Herein,three conjugated network polymers were prepared by using aggregation-induced emission active 1,1,2,2-tetrakis(4-formyl-(1,1’-biphenyl))-ethane(TFBE)unit as monomer and hydrazine as linker.Through regulating the synthetical condition,the polyme ric network can form either unifo rm two-dimensional azine-linked nanosheets(ANS),conjugated microporous polymers(A-CMP)or covalent organic frameworks(A-COF).All of these polymers exhibited good stability and high fluorescence quantum efficiency with the quantum yield of6.31%for A-NS,5.26%for A-CMP,and 5.80%for A-COF,as well as fast and selective fluorescence quenching response to 2,4,6-trinitrophenol(TNP).And the best TNP sensing performance with the Stern-Volmer constants(K_(sv))values up to 8×10^(5)L/mol and a detection limit of 0.09μmol/L was obtained for A-NS.The study explores various strategies to construct conjugated polymers with different nanoarchitectures based on the same building block for sensitive detection of explosives. | Shan Jiang Lingchen Meng Wenyue Ma Qingkai Qi Wei Zhang Bin Xu Leijing Liu Wenjing Tian | 2021 | Chinese Chemical Letters2021，32，3： | 0 |
| 3 | Twisted Intramolecular Charge Transfer—Aggregation-Induced Emission Fluorogen with Polymer Encapsulation-Enhanced NearInfrared Emission for Bioimaging显示文摘Fluorescence probes with strong near-infrared(NIR)emission and water solubility are considered useful visualization tools for localization marking as well as investigating cell migration and transplantation.Here,we designed and synthesized a new donor–π–acceptor(D–π–A)fluorogen,2-(4-[(E)-4-(diphenylamino)styryl]phenyl)-3-(4′-[1,2,2-triphenylvinyl]-[1,1′-biphenyl]-4-yl)fumaronitrile(TB-TPE).TB-TPE exhibits twisted intramolecular charge transfer(TICT)and aggregation-induced emission(AIE)in the NIR region,with an emission peak at 714 nm and a fluorescence quantum yield(Qy)of 6.6%in the solid state.By encapsulating TB-TPE with polystyrene–polyethylene glycol(PS-PEG),watersoluble TB-TPE-PS-PEG nanoparticles(TP NPs)are fabricated,which display polymer encapsulationenhanced emission with a Qy of 46.5%due to the strong restriction effect on the TICT process and the destruction of H aggregation for TB-TPE by the polymer matrix.Au-coated Fe_(3)O_(4)(Fe_(3)O_(4)@Au)nanocrystals were then embedded in the TP NPs to form highly fluorescent TB-TPE-Fe_(3)O_(4)-Au-PS-PEG nanoparticles(TFAP NPs)with a Qy of 39.7%.Our demonstration of successful cellular imaging of TP NPs for Hep-G2 cells and multimodality imaging of TFAP NPs in mouse liver tumors indicates that polymer-encapsulated TB-TPE offers great prospects as a multifunctional fluorescence probe for bioimaging. | Lingchen Meng Xibo Ma Shan Jiang Song Zhang Zhiyuan Wu Bin Xu Zhen Lei Leijing Liu Wenjing Tian | 2021 | CCS Chemistry2021，3，3： | 0 |
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