Polymer Chemistry, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Two emissive hydrazone-linked COFs with abundance of interaction sites were synthesized, showing high sensitivity and selectivity for hydrazine sensing.
Language: Английский
Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(40)
Published: July 18, 2024
Abstract 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 (H 2 ) evolution from water. Nevertheless, the advancement D–A COFs is still constrained by limited investigations on engineering, which enables highly effective charge transfer pathways in deliver photoexcited electrons a preferential orientation enhance performance. Herein, two systems with D–A–A configurations based molecular engineering strategy are proposed construct three distinct COFs. Specifically, TAPPy‐DBTDP‐COF merging one pyrene‐based benzothiadiazole acceptors realized an average H rate 12.7 mmol h −1 g under visible light, among highest ever reported typical D–A‐type COF systems. combination experimental theoretical analysis signifies crucial role dual‐acceptor arrangement promoting exciton dissociation carrier migration. These findings underscore significant structural design, conducive separation holes resulting superior activities.
Language: Английский
Citations
35
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(29)
Published: May 6, 2024
Abstract Despite the pivotal role of molecular oxygen (O 2 ) activation in artificial photosynthesis, 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 TTF‐TFPP‐COF, to promote O activation. Because enhanced electron push‐pull interactions that facilitated separation behavior, exhibited superior photocatalytic activity electron‐induced reactions over TTF‐TFPP‐COF under visible light irradiation, including photosynthesis ( E )‐3‐amino‐2‐thiocyano‐ α , β ‐unsaturated compounds H . These findings highlight significant potential rational design COFs D–A configurations as suitable candidates for advanced applications.
Language: Английский
Citations
24
Advances in Colloid and Interface Science, Journal Year: 2025, Volume and Issue: 339, P. 103427 - 103427
Published: Feb. 6, 2025
Language: Английский
Citations
4
Science China Chemistry, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 3, 2025
Language: Английский
Citations
2
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 18, 2025
Abstract As the largest sensory organ, human skin generates ionic signals in response to tactile, thermal, and electrical stimuli, which are then transmitted neurons processed by brain, thereby enabling sensing memory, ultimately promoting conscious perception decision‐making. However, existing artificial skins face significant challenges including inability achieve multimodal memory simultaneously (i.e., stimuli), difficulty detecting ultra‐low currents, limitations rich synaptic behaviors that essential for highly efficient in‐sensor reservoir computing. Inspired electric eels, study here develops an based on iontronic p‐n junctions consisting of PolyAT PolyES bi‐layered structures. This features broad detection ranges temperature (−80 120 °C, well beyond reach hydrogel counterparties), pressure (0.075 Pa 400 kPa, among highest sensitivities ever reported), current (1–200 nA), meanwhile demonstrates functions. Additionally, incorporating a robotic hand can grasp objects with different temperatures weights demand. Further, fully memristive computing is implemented skin, allowing sensing, decoding, learning via stimulation, achieving 91.3% accuracy classifying MNIST handwritten digit images.
Language: Английский
Citations
2
Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: 35(12), P. 110125 - 110125
Published: June 18, 2024
Language: Английский
Citations
7
Nano Letters, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 7, 2025
Multifunctional memristors with a high memory density, low power consumption, flexibility, programmability, and environmental robustness are essential for next-generation memories. In this work, titanocene-polysulfide complex (Cp2TiS5) strong S···S interactions hydrogen bonds was synthesized integrated TiO2 to create novel Cu/TiO2/Cp2TiS5/Ag memristor. This device shows bipolar nonvolatile performance remarkable ON/OFF ratio (104.8), switching voltages (VSET, -0.16 V; VRESET, +0.15 V), consumption (2.7 × 10-4 μW). It exhibits multilevel behavior, optical modulation (VSET decreases from -1.35 -0.17 V decreasing irradiation wavelength), thermal tolerance (up 200 °C). The electron-rich Cp2TiS5 layer protects the Ag-CFs, while TiO2's oxygen vacancies unsaturated Ti atoms interact sulfur Cp2TiS5, lowering Schottky barrier facilitating charge transport. work offers promising opportunities in flexible memristive devices neuromorphic computing under extreme conditions.
Language: Английский
Citations
1
Inorganic Chemistry Frontiers, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Three water-soluble organic–inorganic hybridized POMs-based memristor are proposed. The introduction of organic ligands improves its performance. mechanism the device during high temperature operation was explored using 2D-COS-IR.
Language: Английский
Citations
1
Nano Letters, Journal Year: 2025, Volume and Issue: unknown
Published: March 25, 2025
The rapid evolution of neuromorphic devices seeks to bridge biological neural networks and artificial systems, enabling energy-efficient scalable computing for next-generation intelligence. Herein, we introduce methyl-engineered one-dimensional covalent organic framework (1D COF)-based memristors as a transformative platform reconfigurable computing. incorporation methyl groups enhances localized polarization effects within the COF framework, effectively mitigating random Ag+ migration/diffusion stabilizing conductive filament morphology. This strategic modification yields with exceptional multilevel storage capabilities, exhibiting superior stability, linearity, reproducibility. Moreover, highly ordered architecture customizable chemical environment methyl-functionalized 1D allows precise control over resistive switching behaviors, facilitating emulation synaptic functions development network architectures. Demonstrating performance in tasks such high-accuracy image recognition, these showcase significant promise foundation energy-efficient, systems.
Language: Английский
Citations
1
Angewandte Chemie International Edition, Journal Year: 2024, Volume and Issue: 63(46)
Published: Aug. 6, 2024
Abstract Organic memristors based on covalent organic frameworks (COFs) exhibit significant potential for future neuromorphic computing applications. The preparation of high‐quality COF nanosheets through appropriate structural design and building block selection is critical the enhancement memristor performance. In this study, a novel room‐temperature single‐phase method was used to synthesize Ta−Cu 3 COF, which contains two redox‐active units: trinuclear copper triphenylamine. resultant were dispersed acid‐assisted exfoliation subsequently spin‐coated fabricate film an indium tin oxide (ITO) substrate. synergistic effect dual centers in film, combined with its distinct crystallinity, significantly reduces redox energy barrier, enabling efficient modulation 128 non‐volatile conductive states Al/Ta−Cu COF/ITO memristor. Utilizing convolutional neural network (CNN) these conductance states, image recognition ten representative campus landmarks successfully executed, achieving high accuracy 95.13 % after 25 training epochs. Compared devices binary exhibits 45.56 improvement enhances efficiency computing.
Language: Английский
Citations
6