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redox switch of ionic transport in conductive polypyrrole-engineered unipolar nanofluidic diodes

Nano Research 2017年第11期10卷 3715-3725页

作者： Qianqian Zhang Zhen Zhang Hangjian Zhou Zhiqiang Xie Liping Wen Zhaoyue Liu Jin Zhai Xungang Diao Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education Beijing Key Laboratory of Bio-inspired Energy Materials and Devices School of Chemistry and Environment Beihang University Beijing 100191 China School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China Beijing National Laboratory for Molecular Sciences(BNLMS) Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China Laboratory of Bioinspired Smart Interfacial Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China

Controlling ion transport in nanoconfined spaces is a key task for the creation of smart nanofluidic *** this work,redox-active polypyrrole （PPy） polymers are introduced into anodic aluminum oxide （AAO） nanochannels to form smart unipolar nanofluidic diodes （UNDs） for the first *** ionic transport behavior of the present polypyrrole-engineered UNDs can be controlled through the redox reactions of *** an applied oxidation potential,conductive PPy exhibits several redox states carrying different charges,following the formation of polarons and bipolarons with different oxidation *** with the asymmetric distribution of PPy in the AAO nanochannels,the UNDs investigated here exhibit redox-switchable ion rectification and ion-gating *** influence of the charge asymmetry of the UNDs on their ionic transport behavior is assessed by precisely controlling the length of oxidized PPy segments in the AAO nanochannels and by carrying out theoretical simulations based on the Poisson and Nernst-Planck （PNP） equations.

关键词： redox switch polypyrrole nanofluidic diodes ion rectification ion gating

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Electrochemical Behavior and redox switch Properties of [Zn(dmit)_2]^(2-)

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Chemical Research in Chinese Universities 1993年第1期9卷 49-52页

作者： HAN Ming-yong, BAI Yu-bai and LI Tie-jin (Department of Chemistry, Jilin University, Changchun, 130023)ZHANG Dong (Department of Petro-Chemical Engineering, Fushun Petroleum Institute, Fushun, 113001)

The redox behavior of [Zn(dmit)2]2- and its electrodeposited film were investigated by cyclic voltammetry, and the Ⅰ-Ⅴ properties of the electrodeposited film were measured. The results show that [Zn(dmit)2]2- possesses good redox switch properties which exhibit good repeatability. It could be considered as a new material for molecular switch and memory.

关键词： Dmit Electrodeposition redox switch

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A cobalt redox switch driving alcohol dehydrogenation by redox coupled molecular swing

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Chinese Chemical Letters 2023年第6期34卷 459-462页

作者： Guoling Li Yang Liu Wei Wang Zhu Zhuo Yougui Huang CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Provincial Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesXiamen 361021China Xiamen Institute of Rare Earth Materials Haixi InstituteChinese Academy of SciencesXiamen 361021China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Developing redox switches that not only perform specific mechanical movements but also drive important chemical reactions is important but a great ***,we report a redox pair of cobalt species(Co^(Ⅲ)/Co^(Ⅱ))that switches through photo-dehydrogenation of alcohol and hydrogenation of *** cobalt species is equipped with a flexible azo-ligand containing two bulky planar substituents.A planar oxidated sate(Co^(Ⅲ)species)can be photo-reduced to a saddle-like reduced state(Co^(Ⅱ))with alcohol molecules as electron donors,and in turn the Co^(Ⅲ)species can be recovered with azo-ligand as oxidant under acidic *** the redox states of the pair are isolated and characterized by single crystal X-ray *** the switching cycle,alcohol is oxidized to aldehyde by azo-ligand through proton coupled electron transfer and the cobalt complex acts as a redox *** results provide important insights into alcohol dehydrogenation catalyzed by redox complexes.

关键词： redox switch Alcohol dehydrogenation Azo-ligand hydrogenation Cobalt complex Mechanical motion

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A luminescence molecular switch via modulation of PET and ICT processes in DCM system

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Science China Chemistry 2017年第5期60卷 607-613页

作者： Jinfeng Yang Meng Li Lihua Kang Weihong Zhu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan College of Chemistry and Chemical EngineeringShihezi UniversityShihezi 832000China School of Environmental Science and Engineering North China Electric Power UniversityBaoding 071003China

A novel versatile dicyanomethylene-4H-pyran （DCM） based derivative bearing ferrocenyl group （DCM-N-Fc） is designed as modulator to construct ＂off-on＂ logic operation. The optical properties of DCM-N-Fc are characterized by absorption and steady-state fluorescence technique, showing that the fluorescence from DCM ehromophore via intramolecular charge transfer （ICT） is strongly quenched by photoinduced electron transfer （PET） process from ferrocene moiety. In contrast with the references （DCM-N and DCM-Fc）, the fluorescence of DCM-N-Fc can be triggered by oxidizing ferrocenyl unit either chemically or electrochemically, exhibiting a characteristic emission modulation at around 610 nm with an electrofluorochromic behavior. Furthermore, the free energy and the fluorescence lifetime in the PET path verify the thermodynamic feasibility. Cyclic voltammetry, absorption spectroscopy, time-resolved fluorescence as well as DFT calculation have been used to elaborate the manipulation via both PET and ICT processes.

关键词： dicyanomethylene-4H-pyran luminescence redox switch ferrocene

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