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学者姓名：陈雄
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Abstract ：
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 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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The artificial photosynthesis of H2O2 from water and oxygen using semiconductor photocatalysts is attracting increasing levels of attention owing to its green, environmentally friendly, and energy-saving characteristics. Although covalent organic frameworks (COFs) are promising materials for promoting photocatalytic H2O2 production owing to their structural and functional diversity, they typically suffer from low charge-generation and -transfer efficiencies as well as rapid charge recombination, which restricts their use as catalysts for photocatalytic H2O2 production. Herein, we report a strategy for anchoring vinyl moieties to a COF skeleton to facilitate charge separation and migration, thereby promoting photocatalytic H2O2 generation. This vinyl-group-bearing COF photocatalyst exhibits a H2O2 -production rate of 84.5 mu mol h(-1) (per 10 mg), which is ten-times higher than that of the analog devoid of vinyl functionality and superior to most reported COF photocatalysts. Both experimental and theoretical studies provide deep insight into the origin of the improved photocatalytic performance. These findings are expected to facilitate the rational design and modification of organic semiconductors for use in photocatalytic applications.
Keyword ：
Charge separation Charge separation Covalent organic frameworks Covalent organic frameworks H2O2 production H2O2 production Photocatalysts Photocatalysts Vinyl groups Vinyl groups
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| GB/T 7714 | Yu, Hong , Zhang, Fengtao , Chen, Qian et al. Vinyl-Group-Anchored Covalent Organic Framework for Promoting the Photocatalytic Generation of Hydrogen Peroxide [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2024 , 63 (21) . |
| MLA | Yu, Hong et al. "Vinyl-Group-Anchored Covalent Organic Framework for Promoting the Photocatalytic Generation of Hydrogen Peroxide" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 63 . 21 (2024) . |
| APA | Yu, Hong , Zhang, Fengtao , Chen, Qian , Zhou, Pan-Ke , Xing, Wandong , Wang, Sibo et al. Vinyl-Group-Anchored Covalent Organic Framework for Promoting the Photocatalytic Generation of Hydrogen Peroxide . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2024 , 63 (21) . |
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Memristors are essential components of neuromorphic systems that mimic the synaptic plasticity observed in biological neurons. In this study, a novel approach employing one-dimensional covalent organic framework (1D COF) films was explored to enhance the performance of memristors. The unique structural and electronic properties of two 1D COF films (COF-4,4 '-methylenedianiline (MDA) and COF-4,4 '-oxydianiline (ODA)) offer advantages for multilevel resistive switching, which is a key feature in neuromorphic computing applications. By further introducing a TiO2 layer on the COF-ODA film, a built-in electric field between the COF-TiO2 interfaces could be generated, demonstrating the feasibility of utilizing COFs as a platform for constructing memristors with tunable resistive states. The 1D nanochannels of these COF structures contributed to the efficient modulation of electrical conductance, enabling precise control over synaptic weights in neuromorphic circuits. This study also investigated the potential of these COF-based memristors to achieve energy-efficient and high-density memory devices. The unique structural and electronic properties of two one-dimensional (1D) covalent organic frameworks (COFs), namely COF-MDA and COF-ODA, were rationally designed to assess their capabilities in multilevel memory devices. This study further explored the potential of these COF-based memristors in realizing energy-efficient and high-density memory devices, and also showcased their potential for neuromorphic applications for the first time. image
Keyword ：
Image recognition Image recognition Memristors Memristors Multilevel memory device Multilevel memory device Neuromorphic computing Neuromorphic computing One-dimensional covalent organic framework One-dimensional covalent organic framework
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| GB/T 7714 | Zhou, Pan-Ke , Li, Yiping , Zeng, Tao et al. One-Dimensional Covalent Organic Framework-Based Multilevel Memristors for Neuromorphic Computing [J]. | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2024 , 63 (20) . |
| MLA | Zhou, Pan-Ke et al. "One-Dimensional Covalent Organic Framework-Based Multilevel Memristors for Neuromorphic Computing" . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 63 . 20 (2024) . |
| APA | Zhou, Pan-Ke , Li, Yiping , Zeng, Tao , Chee, Mun Yin , Huang, Yuxing , Yu, Ziyue et al. One-Dimensional Covalent Organic Framework-Based Multilevel Memristors for Neuromorphic Computing . | ANGEWANDTE CHEMIE-INTERNATIONAL EDITION , 2024 , 63 (20) . |
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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.
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| GB/T 7714 | Panke Zhou , Hong Yu , Mun Yin Chee et al. Electron push-pull effects induced performance promotion in covalent organic polymer thin films-based memristor for neuromorphic application [J]. | 中国化学快报（英文版） , 2024 , 35 (5) : 227-231 . |
| MLA | Panke Zhou et al. "Electron push-pull effects induced performance promotion in covalent organic polymer thin films-based memristor for neuromorphic application" . | 中国化学快报（英文版） 35 . 5 (2024) : 227-231 . |
| APA | Panke Zhou , Hong Yu , Mun Yin Chee , Tao Zeng , Tianli Jin , Hongling Yu et al. Electron push-pull effects induced performance promotion in covalent organic polymer thin films-based memristor for neuromorphic application . | 中国化学快报（英文版） , 2024 , 35 (5) , 227-231 . |
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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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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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Abstract ：
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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The photocatalytic synthesis of hydrogen peroxide (H2O2) from water and oxygen using metal-free catalysts represents a promising approach to H2O2 production, offering advantages in terms of reduced environmental impact, energy efficiency, and enhanced safety. Covalent organic frameworks (COFs) with imine linkages have emerged as a promising class of materials for this purpose, given their structural and functional diversity. However, they often suffer from poor durability, inefficient photogenerated charge separation efficiency, and rapid recombination of photogenerated electron-hole pairs. To address these limitations, a linkage conversion strategy in COFs can be employed to improve both stability and photoactivity. Herein, we demonstrate the conversion of imine bonds into thiazole rings, thereby facilitating charge transfer and enhancing the photocatalytic stability of COFs. This structural modification enables the thiazole-linked COF to maintain stable photocatalysis over a 24-h period, achieving an H2O2 production rate of 57.1 mu mol/h (per 10 mg). This rate is twice that of the pristine imine-linked COF and surpasses those of most metal-free photocatalysts. This investigation provides novel insights into the development of advanced COF-based photocatalysts for photocatalytic energy conversions.
Keyword ：
Covalent organic framework Covalent organic framework Hydrogen peroxide Hydrogen peroxide Linkage conversion Linkage conversion Photocatalysis Photocatalysis
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| GB/T 7714 | Yu, Hong , Zhang, Xuening , Chen, Qian et al. Linkage Conversion in Pyrene-based Covalent Organic Frameworks for Promoted Photocatalytic Hydrogen Peroxide Generation in a Biphasic System [J]. | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES , 2024 . |
| MLA | Yu, Hong et al. "Linkage Conversion in Pyrene-based Covalent Organic Frameworks for Promoted Photocatalytic Hydrogen Peroxide Generation in a Biphasic System" . | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES (2024) . |
| APA | Yu, Hong , Zhang, Xuening , Chen, Qian , Zhou, Pan-Ke , Xu, Fei , Wang, Hongqiang et al. Linkage Conversion in Pyrene-based Covalent Organic Frameworks for Promoted Photocatalytic Hydrogen Peroxide Generation in a Biphasic System . | CHEMICAL RESEARCH IN CHINESE UNIVERSITIES , 2024 . |
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