Variable Learning-Memory Behavior fromπ-Conjugated Ligand to Ligand-Containing Cobalt(II)Complex  

作　　者：Cheng Zhang Mohan Chen Guan Wang Ming Teng Songtao Ling Yanan Wang Zhaojun Su Kun Gao Xinbo Yang Chunlan Ma Yang Li Qichun Zhang 

机构地区：[1]Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application,School of Physical Science and Technology,Suzhou University of Science and Technology,Suzhou,Jiangsu 215009,China [2]College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou,Jiangsu 215123,China [3]School of Petrochemical Engineering,Changzhou University,Changzhou,Jiangsu 213164,China [4]College of Energy,Soochow Institute for Energy and Materials InnovationS(SiEMIS),Soochow University,Suzhou,Jiangsu 215006,China [5]Department of Materials Science and Engineering,City University of Hong Kong,Kowloon,Hong Kong,China [6]Center of Super-Diamond and Advanced Films(COSDAF),City University of Hongkong,Hong Kong SAR,999077 China

出　　处：《Chinese Journal of Chemistry》2022年第19期2296-2304,共9页中国化学（英文版）

基　　金：Y.L.thanks financial support from the National Natural Science Foundation of China(Grants No.22008164);the Natural Science Foundation of Jiangsu Province(Grants No.BK20190939);the Natural Science Foundation of the Jiangsu Higher Education Institutions of China(Grants No.19KJB150018);This work is also supported by Six Talent Peaks Project of Jiangsu Province,China(XCL-078);Jiangsu Key Disciplines of the Fourteenth Five-Year Plan(2021135);the Suzhou Key Laboratory for Low Dimensional Optoelectronic Materials and Devices(SzS201611);Q.Z.thanks thefunding support from City University of Hong Kong(9380117,7005620 and 7020040)and Hong Kong Institute for Advanced Study,City University of Hong Kong,Hong Kong,P.R.China.

摘　　要：In the information-explosion era,developing novel algorithms and memristive devices has become a promising concept for next-generation capacity enlargement technology.Organic small molecule-based devices displaying superior learning-memory performance have attracted much attention,except for the existence of poor heat-resilience and mediocre conductivity.In this paper,a strategy of transforming an organic-type data-storage material to metal complex is proposed to resolve these intrinsic issues.A pristine NDI-derivative(NIPy)and its corresponding Co(II)complex(CoNIPy)are synthesized for the purpose of electrical property investigation.CoNIPy complex-based memristive device exhibits superior ternary WORM memory performance compared with the binary behavior of NIPy,including>104 s of reading,lower threshold voltage(V_(th)),1:10^(2):10^(5)of OFF/ON1/ON2 current ratio,and long-term stability in heating environment.The variable learning-memory behavior can be attributed to the enhanced ligand-to-metal charge transfer(LMCT)and improved redox activity after the introduction of central metal atom and coordination bond.These studies on material innovation and optimal performance are of great importance not only for environmentally-robust memristive devices but also for practical application of a host of organic electronic devices.

关 键 词：Charge transfer Coordination modes Nitrogen heterocycles Naphthalimide(NDI) Memory devices 

分 类 号：O62[理学—有机化学]