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学者姓名：陈雄
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Abstract ：
The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C equivalent to C-) or diacetylene (-C equivalent to C-C equivalent to C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching behavior. Our findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree of pi-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably, upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times (WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350 degrees C, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.
Keyword ：
memory device memory device stimuli-response stimuli-response switching mechanism switching mechanism topological polymerization topological polymerization two-dimensional covalent organic frameworks two-dimensional covalent organic frameworks
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| GB/T 7714 | Zhou, Pan-Ke , Huang, Yuxing , Yu, Ziyue et al. Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties [J]. | SCIENCE CHINA-CHEMISTRY , 2025 . |
| MLA | Zhou, Pan-Ke et al. "Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties" . | SCIENCE CHINA-CHEMISTRY (2025) . |
| APA | Zhou, Pan-Ke , Huang, Yuxing , Yu, Ziyue , Zhang, Cong , Chen, Qian , Li, Yiping et al. Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties . | SCIENCE CHINA-CHEMISTRY , 2025 . |
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Polymeric carbon nitrides (PCNs), usually the melon phase, have been extensively applied as photocatalysts for CO2 reduction; however, their performance is still unsatisfactory. The condensed allotrope, namely, poly(triazine imide) (PTI) with extended conjugation and a crystallized structure, indeed holds more favorable compositional and structural advantages for photocatalytic CO(2)reduction but remains to be fully exploited. Herein, hexagonal prism-shaped PTI crystals were synthesized and developed as a high-performance photocatalyst for CO2 reduction. With Co(bpy)(3) (2+) as a cocatalyst, the PTI crystals exhibit a CO evolution rate of 44 mu mol h(-1) (i.e., 1467 mu mol g(-1) h(-1)) with 93% selectivity, markedly superior to that of the melon counterpart. Moreover, PTI crystals manifest an apparent quantum efficiency of 12.9% at 365 nm, representing the state-of-the-art value by PCN photocatalysts for CO2-to-CO reduction without using noble metals. The surface pyridine N species of PTI are exposed as active sites to dominate CO2 activation and conversion, which, together with the high crystallinity to facilitate charge separation and transport, endows high CO2 reduction efficiency. In situ diffuse reflectance infrared Fourier transform spectroscopy determines the key intermediates during the CO2 reduction reaction and, consequently, constructs the possible reaction mechanism.
Keyword ：
active sites active sites carbon nitride carbon nitride CO2 reduction CO2 reduction photocatalysis photocatalysis poly(triazineimide) poly(triazineimide) pyridine nitrogen pyridine nitrogen
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| GB/T 7714 | Liu, Feng , Deng, Jing , Su, Bo et al. Poly(triazine imide) Crystals for Efficient CO2 Photoreduction: Surface Pyridine Nitrogen Dominates the Performance [J]. | ACS CATALYSIS , 2025 , 15 (2) : 1018-1026 . |
| MLA | Liu, Feng et al. "Poly(triazine imide) Crystals for Efficient CO2 Photoreduction: Surface Pyridine Nitrogen Dominates the Performance" . | ACS CATALYSIS 15 . 2 (2025) : 1018-1026 . |
| APA | Liu, Feng , Deng, Jing , Su, Bo , Peng, Kang-Shun , Liu, Kunlong , Lin, Xiahui et al. Poly(triazine imide) Crystals for Efficient CO2 Photoreduction: Surface Pyridine Nitrogen Dominates the Performance . | ACS CATALYSIS , 2025 , 15 (2) , 1018-1026 . |
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Kinetic factors frequently emerge as the primary constraints in photocatalysis, exerting a critical influence on the efficacy of polymeric photocatalysts. The diverse conjugation systems within covalent organic frameworks (COFs) can significantly impact photon absorption, energy level structures, charge separation and migration kinetics. Consequently, these limitations often manifest as unsatisfactory kinetic behavior, which adversely affects the photocatalytic activity of COFs. To address these challenges, we propose a methoxy (-OMe) molecular engineering strategy designed to enhance charge carrier kinetics and mitigate mass transfer resistance. Through strategic modulation of the position and quantity of -OMe units, we can effectively manipulate the p-pi conjugation, thereby enhancing charge separation and migration. Moreover, COFs enriched with -OMe moieties exhibit enhanced mass transfer dynamics due to the hydrophilic nature of methoxy groups, which facilitate the diffusion of reactants and products within the porous structure. This approach is hypothesized to drive an efficient photocatalytic hydrogen evolution reaction.
Keyword ：
Charge separation Charge separation Covalent Organic Framework Covalent Organic Framework Hydrogen evolution Hydrogen evolution Photocatalysis Photocatalysis p-pi resonance effect p-pi resonance effect
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| GB/T 7714 | Luo, Zhipeng , Zhu, Shipeng , Xue, Huanglan et al. Manipulating p-π Resonance through Methoxy Group Engineering in Covalent Organic Frameworks for an Efficient Photocatalytic Hydrogen Evolution [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2025 , 64 (6) . |
| MLA | Luo, Zhipeng et al. "Manipulating p-π Resonance through Methoxy Group Engineering in Covalent Organic Frameworks for an Efficient Photocatalytic Hydrogen Evolution" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 64 . 6 (2025) . |
| APA | Luo, Zhipeng , Zhu, Shipeng , Xue, Huanglan , Yang, Wanxiang , Zhang, Fengtao , Xu, Fei et al. Manipulating p-π Resonance through Methoxy Group Engineering in Covalent Organic Frameworks for an Efficient Photocatalytic Hydrogen Evolution . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2025 , 64 (6) . |
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Multifunctional memristors with a high memory density, low power consumption, flexibility, programmability, and environmental robustness are essential for next-generation memories. In this work, a titanocene-polysulfide complex (Cp2TiS5) with strong SS interactions and hydrogen bonds was synthesized and integrated with TiO2 to create a novel Cu/TiO2/Cp2TiS5/Ag memristor. This device shows bipolar nonvolatile memory performance with a remarkable ON/OFF ratio (104.8), low switching voltages (V SET, -0.16 V; V RESET, +0.15 V), and low power consumption (2.7 x 10-4 mu W). It exhibits multilevel memory behavior, flexibility, optical modulation (V SET decreases from -1.35 to -0.17 V with decreasing irradiation wavelength), and thermal tolerance (up to 200 degrees C). The electron-rich Cp2TiS5 layer protects the Ag-CFs, while TiO2's oxygen vacancies and unsaturated Ti atoms interact with sulfur from Cp2TiS5, lowering the Schottky barrier and facilitating charge transport. This work offers promising opportunities in flexible memristive devices for neuromorphic computing under extreme conditions.
Keyword ：
flexible memory flexible memory interfacial engineering interfacial engineering memristor memristor multilevel memory multilevel memory titanocene-polysulfide titanocene-polysulfide
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| GB/T 7714 | Zhou, Panke , Lin, Xi , Gao, Yiqun et al. Engineering Titanium Dioxide/Titanocene-Polysulfide Interface for Flexible, Optical-Modulated, and Thermal-Tolerant Multilevel Memristor [J]. | NANO LETTERS , 2025 , 25 (7) : 2741-2748 . |
| MLA | Zhou, Panke et al. "Engineering Titanium Dioxide/Titanocene-Polysulfide Interface for Flexible, Optical-Modulated, and Thermal-Tolerant Multilevel Memristor" . | NANO LETTERS 25 . 7 (2025) : 2741-2748 . |
| APA | Zhou, Panke , Lin, Xi , Gao, Yiqun , Lin, Xiaoli , Zeng, Tao , Li, Haohong et al. Engineering Titanium Dioxide/Titanocene-Polysulfide Interface for Flexible, Optical-Modulated, and Thermal-Tolerant Multilevel Memristor . | NANO LETTERS , 2025 , 25 (7) , 2741-2748 . |
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The rapid evolution of neuromorphic devices seeks to bridge biological neural networks and artificial systems, enabling energy-efficient and scalable computing for next-generation artificial intelligence. Herein, we introduce methyl-engineered one-dimensional covalent organic framework (1D COF)-based memristors as a transformative platform for reconfigurable neuromorphic computing. The incorporation of methyl groups enhances localized polarization effects within the COF framework, effectively mitigating random Ag+ migration/diffusion and stabilizing conductive filament morphology. This strategic modification yields devices with exceptional multilevel storage capabilities, exhibiting superior stability, linearity, and reproducibility. Moreover, the highly ordered architecture and customizable chemical environment of the methyl-functionalized 1D COF allows for precise control over resistive switching behaviors, facilitating the emulation of synaptic functions and the development of artificial neural network architectures. Demonstrating exceptional performance in neuromorphic tasks such as high-accuracy image recognition, these devices showcase significant promise as the foundation for energy-efficient, next-generation neuromorphic computing systems.
Keyword ：
Localized polarization effects Localized polarization effects Memristors Memristors Multilevelmemory device Multilevelmemory device Neuromorphic computing Neuromorphic computing One-dimensional covalent organic frameworks One-dimensional covalent organic frameworks
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| GB/T 7714 | Zhou, Pan-Ke , Yu, Ziyue , Zeng, Tao et al. Reconfigurable Neuromorphic Computing Using Methyl-Engineered One-Dimensional Covalent Organic Framework Memristors [J]. | NANO LETTERS , 2025 , 25 (14) : 5891-5898 . |
| MLA | Zhou, Pan-Ke et al. "Reconfigurable Neuromorphic Computing Using Methyl-Engineered One-Dimensional Covalent Organic Framework Memristors" . | NANO LETTERS 25 . 14 (2025) : 5891-5898 . |
| APA | Zhou, Pan-Ke , Yu, Ziyue , Zeng, Tao , Zhang, Cong , Huang, Yuxing , Chen, Qian et al. Reconfigurable Neuromorphic Computing Using Methyl-Engineered One-Dimensional Covalent Organic Framework Memristors . | NANO LETTERS , 2025 , 25 (14) , 5891-5898 . |
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The indirect anthraquinone method is currently used to produce H2O2, but it leads to high energy consumption and a large amount of chemical waste. Alternatively, water oxidation reactions offer a potential green approach for H2O2 production, although it is constrained by low selectivity. Herein, the functional photoanodes are rationally designed for H2O2 production via photocatalytic water oxidation. Specifically, P/Mo co-doped BiVO4 films are achieved on a conductive glass to serve as the photocatalytic layer, which is coated with an ultrathin amorphous TiO2 film to achieve good stability. Importantly, metal-free P-doped polymeric carbon nitride dots are deposited on the photoanode, acting as the reaction centres. This innovative approach moves away from the traditional reliance on inorganic materials as co-catalysts in order to suppress the thermodynamically favoured O-2 evolution, which, in turn, significantly enhances the selectivity, efficiency and stability of H2O2 production. Consequently, an optimal selectivity of approximate to 64% for H2O2 production is achieved at an applied voltage bias of 1.7 V versus RHE in a 1.0 m KHCO3 solution, achieving a yield of approximate to 34.2 mu mol hr(-1) cm(-2). This research offers a novel strategy for developing photocatalytic films with optimised co-catalysts for a photoanode in photocatalytic H2O2 synthesis.
Keyword ：
BiVO4 BiVO4 H2O2 synthesis H2O2 synthesis photoanode photoanode polymeric carbon nitride dots polymeric carbon nitride dots water oxidation water oxidation
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| GB/T 7714 | Wang, Yankun , Xu, Yuntao , Zhang, Xirui et al. Integrating P-Doped Carbon Nitride Dots as Active Sites on P/Mo Co-Doped BiVO4 Photoanodes Promotes H2O2 Production [J]. | SMALL , 2025 . |
| MLA | Wang, Yankun et al. "Integrating P-Doped Carbon Nitride Dots as Active Sites on P/Mo Co-Doped BiVO4 Photoanodes Promotes H2O2 Production" . | SMALL (2025) . |
| APA | Wang, Yankun , Xu, Yuntao , Zhang, Xirui , Qian, Rong , Chen, Xiong , Chen, Qiao et al. Integrating P-Doped Carbon Nitride Dots as Active Sites on P/Mo Co-Doped BiVO4 Photoanodes Promotes H2O2 Production . | SMALL , 2025 . |
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The integration of electron donor (D) and acceptor (A) units into covalent organic frameworks (COFs) has received increasing interest due to its potential for efficient photocatalytic hydrogen (H2) evolution from water. Nevertheless, the advancement of D–A COFs is still constrained by the limited investigations on acceptor engineering, which enables the highly effective charge transfer pathways in COFs to deliver photoexcited electrons in a preferential orientation to enhance photocatalytic performance. Herein, two systems with D–A and D–A–A configurations based on the acceptor molecular engineering strategy are proposed to construct three distinct COFs. Specifically, TAPPy-DBTDP-COF merging one pyrene-based donor and two benzothiadiazole acceptors realized an average H2 evolution rate of 12.7 mmol h−1 g−1 under visible light, among the highest ever reported for typical D–A-type COF systems. The combination of experimental and theoretical analysis signifies the crucial role of the dual-acceptor arrangement in promoting exciton dissociation and carrier migration. These findings underscore the significant potential of D–A–A structural design, which is conducive to the efficient separation of photoexcited electrons and holes resulting in superior photocatalytic activities. © 2024 Wiley-VCH GmbH.
Keyword ：
covalent organic frameworks covalent organic frameworks donor-acceptor COFs donor-acceptor COFs H2 evolution H2 evolution photocatalysis photocatalysis
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| GB/T 7714 | Liu, N. , Xie, S. , Huang, Y. et al. Dual–Acceptor Engineering in Pyrene-Based Covalent Organic Frameworks for Boosting Photocatalytic Hydrogen Evolution [J]. | Advanced Energy Materials , 2024 , 14 (40) . |
| MLA | Liu, N. et al. "Dual–Acceptor Engineering in Pyrene-Based Covalent Organic Frameworks for Boosting Photocatalytic Hydrogen Evolution" . | Advanced Energy Materials 14 . 40 (2024) . |
| APA | Liu, N. , Xie, S. , Huang, Y. , Lu, J. , Shi, H. , Xu, S. et al. Dual–Acceptor Engineering in Pyrene-Based Covalent Organic Frameworks for Boosting Photocatalytic Hydrogen Evolution . | Advanced Energy Materials , 2024 , 14 (40) . |
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Covalent organic polymer (COP) thin film-based memristors have generated intensive research interest, but the studies are still in their infancy. Herein, by controlling the content of hydroxyl groups in the aldehyde monomer, Py-COP thin films with different electronic push-pull effects were fabricated bearing distinct memory performances, where the films were prepared by the solid-liquid interface method on the ITO substrates and further fabricated as memory devices with ITO/Py-COPs/Ag architectures. The Py-COP-1-based memory device only exhibited binary memory behavior with an ON/OFF ratio of 1:101.87. In contrast, the device based on Py-COP-2 demonstrated ternary memory behavior with an ON/OFF ratio of 1:100.6:103.1 and a ternary yield of 55%. The ternary memory mechanism of the ITO/Py-COP-2/Ag memory device is most likely due to the combination of the trapping of charge carriers and conductive filaments. Interestingly, the Py-COPs-based devices can successfully emulate the synaptic potentiation/depression behavior, clarifying the programmability of these devices in neuromorphic systems. These results suggest that the electronic properties of COPs can be precisely tuned at the molecular level, which provides a promising route for designing multi-level memory devices. © 2024
Keyword ：
Covalent organic polymers Covalent organic polymers Memristor Memristor Multi-level memory Multi-level memory Push-pull effects Push-pull effects
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| GB/T 7714 | Zhou, P. , Yu, H. , Chee, M.Y. et al. Electron push-pull effects induced performance promotion in covalent organic polymer thin films-based memristor for neuromorphic application [J]. | Chinese Chemical Letters , 2024 , 35 (5) . |
| MLA | Zhou, P. et al. "Electron push-pull effects induced performance promotion in covalent organic polymer thin films-based memristor for neuromorphic application" . | Chinese Chemical Letters 35 . 5 (2024) . |
| APA | Zhou, P. , Yu, H. , Chee, M.Y. , Zeng, T. , Jin, T. , Wu, S. et al. Electron push-pull effects induced performance promotion in covalent organic polymer thin films-based memristor for neuromorphic application . | Chinese Chemical Letters , 2024 , 35 (5) . |
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The burgeoning field of conjugated microporous polymers (CMPs) has generated widespread interest due to their potential as photocatalysts for hydrogen production from water. Nevertheless, their photocatalytic performance is sometimes hindered by inadequate charge separation and transfer, coupled with rapid charge recombination. Herein, a strategy to enhance photocatalytic performance via the customization of pi-bridges through the modulation of heteroatoms in a series of donor-pi-acceptor (D-pi-A) CMPs is proposed. This affords optimized energy levels and improved charge separation and transfer, thus boosting photocatalytic efficiency. Among various heteroatom substitutions, S-doped CMP (10 mg) demonstrates the highest photocatalytic hydrogen evolution rate of 203 mu mol h(-1) (AQY(450nm) = 7.4%) under visible light irradiation. Subsequent experimental analysis reveals its superior photocatalytic performance can be largely related to its minimized exciton binding energy, facilitated charge transfer efficiency, and impeded charge recombination among these heteroatom-doped D-pi-A CMPs. This research paves the way for the rational design and modification of organic semiconductors for advanced solar-driven photocatalysis by promoting charge separation and transfer.
Keyword ：
conjugated microporous polymers conjugated microporous polymers D-pi-A D-pi-A hydrogen evolution hydrogen evolution photocatalysis photocatalysis
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| GB/T 7714 | Li, Chunlei , Xu, Hetao , Xiong, Hao et al. Π-Bridge Modulations in D-π-A Conjugated Microporous Polymers to Facilitate Charge Separation and Transfer Kinetics for Efficient Photocatalysis [J]. | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (44) . |
| MLA | Li, Chunlei et al. "Π-Bridge Modulations in D-π-A Conjugated Microporous Polymers to Facilitate Charge Separation and Transfer Kinetics for Efficient Photocatalysis" . | ADVANCED FUNCTIONAL MATERIALS 34 . 44 (2024) . |
| APA | Li, Chunlei , Xu, Hetao , Xiong, Hao , Xia, Shuling , Peng, Xu , Xu, Fei et al. Π-Bridge Modulations in D-π-A Conjugated Microporous Polymers to Facilitate Charge Separation and Transfer Kinetics for Efficient Photocatalysis . | ADVANCED FUNCTIONAL MATERIALS , 2024 , 34 (44) . |
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Despite the pivotal role of molecular oxygen (O-2) activation in artificial photosynthesis, the activation efficiency is often restricted by sluggish exciton dissociation and charge transfer kinetics within polymer photocatalysts. Herein, we propose two tetrathiafulvalene (TTF)-based imine-linked covalent organic frameworks (COFs) with tailored donor-acceptor (D-A) structures, TTF-PDI-COF and TTF-TFPP-COF, to promote O-2 activation. Because of enhanced electron push-pull interactions that facilitated charge separation and transfer behavior, TTF-PDI-COF exhibited superior photocatalytic activity in electron-induced O-2 activation reactions over TTF-TFPP-COF under visible light irradiation, including the photosynthesis of (E)-3-amino-2-thiocyano-alpha,beta-unsaturated compounds and H2O2. These findings highlight the significant potential of the rational design of COFs with D-A configurations as suitable candidates for advanced photocatalytic applications.
Keyword ：
Covalent organic frameworks Covalent organic frameworks Donor-acceptor polymers Donor-acceptor polymers H2O2 production H2O2 production Molecular oxygen activation Molecular oxygen activation Photocatalysis Photocatalysis
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| GB/T 7714 | Xu, Hetao , Xia, Shuling , Li, Chunlei et al. Programming Tetrathiafulvalene-Based Covalent Organic Frameworks for Promoted Photoinduced Molecular Oxygen Activation [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2024 , 63 (29) . |
| MLA | Xu, Hetao et al. "Programming Tetrathiafulvalene-Based Covalent Organic Frameworks for Promoted Photoinduced Molecular Oxygen Activation" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 63 . 29 (2024) . |
| APA | Xu, Hetao , Xia, Shuling , Li, Chunlei , Li, Yang , Xing, Wandong , Jiang, Yi et al. Programming Tetrathiafulvalene-Based Covalent Organic Frameworks for Promoted Photoinduced Molecular Oxygen Activation . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2024 , 63 (29) . |
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