We introduced bipyridine ligands into a series of two‐dimensional （2D） covalent organic frame‐works （COFs） using 2,2’‐bipyridine‐5,5’‐dicarbaldehyde （2,2’‐BPyDCA） as a component in the mixed building bl...We introduced bipyridine ligands into a series of two‐dimensional （2D） covalent organic frame‐works （COFs） using 2,2’‐bipyridine‐5,5’‐dicarbaldehyde （2,2’‐BPyDCA） as a component in the mixed building blocks. The framework of the COFs was formed by the linkage of imine groups. The ligand content in the COFs was synthetically tuned by the content of 2,2’‐BPyDCA, and thus the amount of metal, palladium（II） acetate, bonded to the nitrogen ligands could be manipulated. Both the bipyri‐dine ligands and imine groups can coordinate with Pd（II） ions, but the loading position can be var‐ied, with one ligand favoring binding in the space between adjacent COFs’ layers and the other lig‐and favoring binding within the pores of the COFs. The Pd（II）‐loaded COFs exhibited good catalytic activity for the Heck reaction.展开更多
Memristors have recently emerged as promising contenders for in-memory computing and artificial neural networks,attributed to their analogies to biological synapses and neurons in structural and electrical behaviors.F...Memristors have recently emerged as promising contenders for in-memory computing and artificial neural networks,attributed to their analogies to biological synapses and neurons in structural and electrical behaviors.From the diversity level,a variety of materials have been demonstrated to have great potential for memristor applications.Herein,we focus on one class of crystalline materials(CMs)-based flexible memristors with state-of-the-art experimental demonstrations.Firstly,the typical device structure and switching mechanisms are introduced.Secondly,the recent advances on CMs-based flexible memristors,including 2 D materials,metal-organic frameworks,covalent organic frameworks,and perovskites,as well as their applications for data storage and neuromorphic devices are comprehensively summarized.Finally,the future challenges and perspectives of CMs-based flexible memristors are presented.展开更多
基金supported by the National Natural Science Foundation of China(21473196,21403214)the 100‐Talents Program of Chinese Academy of SciencesState Key Laboratory of Fine Chemicals,Dalian University of Technology(KF1415)~~
文摘We introduced bipyridine ligands into a series of two‐dimensional （2D） covalent organic frame‐works （COFs） using 2,2’‐bipyridine‐5,5’‐dicarbaldehyde （2,2’‐BPyDCA） as a component in the mixed building blocks. The framework of the COFs was formed by the linkage of imine groups. The ligand content in the COFs was synthetically tuned by the content of 2,2’‐BPyDCA, and thus the amount of metal, palladium（II） acetate, bonded to the nitrogen ligands could be manipulated. Both the bipyri‐dine ligands and imine groups can coordinate with Pd（II） ions, but the loading position can be var‐ied, with one ligand favoring binding in the space between adjacent COFs’ layers and the other lig‐and favoring binding within the pores of the COFs. The Pd（II）‐loaded COFs exhibited good catalytic activity for the Heck reaction.
基金the support from the starting funding of City University of Hong Kong(9380117)the 111 Project(D20015)+5 种基金the financial support from the National Natural Science Foundation of China(22008164)the Natural Science Foundation of Jiangsu Province(BK20190939)the Natural Science Foundation of Jiangsu Higher Education Institutions of China(19KJB150018)supported by the Natural Science Foundation of Jiangsu Higher Education Institutions(18KJA470004)the Six Talent Peaks Project of Jiangsu Province,China(XCL-078)Suzhou Key Laboratory for Low Dimensional Optoelectronic Materials and Devices(SZS201611)。
文摘Memristors have recently emerged as promising contenders for in-memory computing and artificial neural networks,attributed to their analogies to biological synapses and neurons in structural and electrical behaviors.From the diversity level,a variety of materials have been demonstrated to have great potential for memristor applications.Herein,we focus on one class of crystalline materials(CMs)-based flexible memristors with state-of-the-art experimental demonstrations.Firstly,the typical device structure and switching mechanisms are introduced.Secondly,the recent advances on CMs-based flexible memristors,including 2 D materials,metal-organic frameworks,covalent organic frameworks,and perovskites,as well as their applications for data storage and neuromorphic devices are comprehensively summarized.Finally,the future challenges and perspectives of CMs-based flexible memristors are presented.
