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Chinese Chemical Letters 2024年第4期35卷 142-146页

作者： Lang Gao Cen Zhou Rui Wang Feng Lan Bohang An Xiaozhou Huang Xiao Zhang Fujian Key Laboratory of Polymer Science Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical EngineeringCollege of Chemistry and Materials ScienceFujian Normal UniversityFuzhou 350007China Fujian Engineering and Research Center of New Chinese Lacquer Materials College of Materials and Chemical EngineeringMinjiang UniversityFuzhou 350108China

Inverse vulcanized polymers(IVPs) that generated from elemental sulfur and smaller amounts of alkenes have found broad promising applications such as cathode materials for Li-S batteries, dynamic and repairable materials, optics applications, and metal sorption. However, their exploration in organic synthesis is still unprecedented. Here we first report the application of inverse vulcanized polymers in catalysis for organic transformations. A biomass-derived inverse vulcanized polymer(IVP-EAE) is found to be capable of catalyzing cross-coupling reactions in a transition-metal-free fashion under visible *** method allows the direct C–H functionalization of pyrroles and N-arylacrylamides with(hetero)aryl halides, respectively, leading to the formation of two sets of structurally important scaffolds including pyrrole-containing biaryls and 3,3-disubstituted oxindoles with high selectivity. We anticipate this study will not only unveil the new potential of IVPs, but also offer a distinct type of catalysts for organic transformations.

关键词： cross coupling Inverse vulcanized polymers Metal free Photocatalyst Visible light

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cross-coupling integral adaptive robust posture control of a pneumatic parallel platform

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Journal of Central South University 2016年第8期23卷 2036-2047页

作者：左赫陶国良 State Key Laboratory of Fluid Power Transmission and Control Zhejiang University

A pneumatic parallel platform driven by an air cylinder and three circumambient pneumatic muscles was considered. Firstly, a mathematical model of the pneumatic servo system was developed for the MIMO nonlinear model-based controller designed. The pneumatic muscles were controlled by three proportional position valves, and the air cylinder was controlled by a proportional pressure valve. As the forward kinematics of this structure had no analytical solution, the control strategy should be designed in joint space. A cross-coupling integral adaptive robust controller(CCIARC) which combined cross-coupling control strategy and traditional adaptive robust control(ARC) theory was developed by back-stepping method to accomplish trajectory tracking control of the parallel platform. The cross-coupling part of the controller stabilized the length error in joint space as well as the synchronization error, and the adaptive robust control part attenuated the adverse effects of modelling error and disturbance. The force character of the pneumatic muscles was difficult to model precisely, so the on-line recursive least square estimation(RLSE) method was employed to modify the model compensation. The projector mapping method was used to condition the RLSE algorithm to bound the parameters estimated. An integral feedback part was added to the traditional robust function to reduce the negative influence of the slow time-varying characteristic of pneumatic muscles and enhance the ability of trajectory tracking. The stability of the controller designed was proved through Laypunov's theory. Various contrast controllers were designed to testify the newly designed components of the CCIARC. Extensive experiments were conducted to illustrate the performance of the controller.

关键词： servo-pneumatic system pneumatic muscle parallel platform cross coupling adaptive robust control parameter estimation

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The Chaotic Behavior of Two-Dimensional cross coupling Logistic Mapping

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The Chaotic Behavior of Two-Dimensional Cross Coupling Logis...

Adaptive outer synchronization between two delayed oscillator networks with cross couplings

第七届全国非线性动力学学术会议和第九届全国非线性振动学术会议

作者：刘艳邱东超李义栾玲杜增辽宁师范大学物理与电子技术学院

A two-dimensional (2D) mathematic model of the cross coupling Logistic mapping based on one-dimensional (1D) Logistic mapping is constructed , bifurcation structure of the 2D system is founded to be f

关键词： chaos bifurcation cross coupling Logistic mapping

来源： cnki会议评论

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Science China(Information Sciences) 2020年第10期63卷 267-269页

作者： Jianbao ZHANG Ancai ZHANG Jinde CAO Jianlong QIU Fuad E.ALSAADI School of Automation Southeast University School of Information Science and Engineering Linyi University Department of Electrical and Computer Engineering Faculty of EngineeringKing Abdulaziz University

Dear editor,Chaos synchronization is a typical kind of collective behaviors induced by external control or mutual couplings between chaotic nodes [1].During the past decades,increasing interest has been devoted to study the interplay between network topology and chaos synchronization [1,2].Many types of synchronization phenomena have been proposed such as complete synchronization,cluster synchronization [3],and outer synchroni-

关键词： Adaptive control Complex networks Lyapunov method Outer synchronization cross coupling

Ni-mediated C–N activation of amides and derived catalytic transformations

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Science China Chemistry 2017年第11期60卷 1413-1424页

作者： Yuan Gao Chong-Lei Ji Xin Hong Department of Chemistry Zhejiang UniversityHangzhou 310027China

Amide, as a ubiquitous functional group, is essential in various aspects of chemistry and biology. Although the history of studying amide is rich and fruitful, the synthetic application of amide is very limited due to the inertness of amide C–N bond. Recently,significant advances have been achieved towards the nickel-mediated C–N activation of amides. This approach allows a facile generation of acyl-nickel intermediates, and a number of unique transformations have been designed and realized based on the amide C–N bond activation. Focused on the catalytic transformation, this review summarizes and categorizes the recent advances on the synthetic applications of Ni-mediated C–N bond activation of amides.

关键词： C-N activation amide nickel homogeneous catalysis cross coupling

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High Selectivity Cascaded Quadruplet Bandpass Filter with Three Pairs of Transmission Zeros

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Chinese Journal of Electronics 2017年第5期26卷 1101-1104页

作者： CHEN Jianfeng CHEN Fuchang LI Runshuo XIE Zeming CHU Qingxin School of Electronic and Information Engineering South China University of Technology

A novel microstrip Cascaded quadruplet(CQ) bandpass filter using quarter wavelength resonators and three-quarter wavelength resonators is *** on cross coupling and source-load coupling,three pairs of finite transmission zeros are generated at the *** a result,the out-of-band rejection can be enhanced and high selectivity is *** on the proposed structure,a cascaded quadruplet filter centering at 3.0GHz is designed and *** agreement between the measured and simulated data is obtained.

关键词： Cascaded quadruplet(CQ) Bandpass filter cross coupling Transmission zeros Microstrip

Nickel-Catalyzed Electroreductive Syntheses of Triphenylenes Using ortho-Dihalobenzene-Derived Benzynes

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Chinese Journal of Chemistry 2022年第19期40卷 2335-2344页

作者： Zhao-Ming Li Bin Shuai Cong Ma Ping Fang Tian-Sheng Mei State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisShanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling RoadShanghai200032 China

Electrochemical nickel-catalyzed syntheses of triphenylenes by a)reductive trimerization of ortho-dibromobenzenes or ortho-bromoarylsulfurofluoridates,or b)reductive cross-coupling of ortho-dibromobenzenes to 2,2’-diiodobiphenyls,are *** former provides a practical means for the construction of triphenylene derivatives in up to 87%isolated yield at room *** 1,2-dihalo-3-methylbenzenes and related ortho-trisubstituted substrates,trimerizations proceed with high substrate-controlled regioselectivity for the non-C3h symmetric triphenylene isomer.

关键词： Electrochemistry Ni catalysis Benzyne Cyclotrimerization cross coupling

Modular Total Synthesis of (-)-Palmyrolide A and (+)-(5S,7S)-Palmyrolide A via Ring-Closing Metathesis and Alkene Isomerization

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Chinese Journal of Chemistry 2021年第1期39卷 69-74页

作者： Yecai Lai Wei-Min Dai Laboratory of Advanced Catalysis and Synthesis Department of Chemistry and Hong Kong Branch of the Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou)The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina Baiyunshan Pharmaceutical General Factory Guang-zhou Baiyunshan Pharmaceutical Holdings Co.Ltd.Guangzhou 510515China

A pentamodule assembly approach has been established for total synthesis of the naturally occurring(-)-palmyrolide A and(+)-5,7-epi-palmyrolide *** using the racemic tert-butyl carbinol-containing alkyl iodide,the two diastereoisomeric macrolides could be obtained from the same sequence of reactions,demonstrating the flexibility of the multimodule assembly strategy for diverted total synthesis.

关键词： Alkene B-Alky Suzuki-Miyaura cross-coupling Modular total synthesis cross coupling Ring-closing metathesis

Electrochemical Palladium-Catalyzed Intramolecular C-H Amination of 2-Amidobiaryls for Synthesis of Carbazoles

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Chinese Journal of Chemistry 2021年第1期39卷 143-148页

作者： Qingqing Wang Xiaojing Zhang Pan Wang Xinlong Gao Heng Zhang Aiwen Lei College of Chemistry and Molecular Sciences Institute for Advonced Studies(IAS)Wuhan UniversityWuhanHubei 430072China State Key Laboroatory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling RoodShanghai 200032China National Research Center for Carbohydrate Synthesis Jiangxi Normal UniversityNanchangJiangxi 330022China

The synthesis of carbazoles based on the electrochemical Pd-catalyzed intramolecular C-H amination of 2-amidobiaryls through oxidative cross coupling has been achieved under mild reaction *** reaction can be carried out in undivided cell without the addition of external chemical *** good functional group compatibility,the desired carbazoles can be scaled up and modified *** with previous methods,this protocol affords a simple and sustainable avenue for the construction of car-bazoles.

关键词： Electrosynthesis Palladium-catalyzed cross coupling Amination Carbazoles

Methylation of Arenols through Ni-catalyzed C--O Activation with Methyl Magnesium Bromide

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Chinese Journal of Chemistry 2018年第3期36卷 183-186页

作者： Wen-Juan Shi Zhang-Jie Shi College of Chemistry and Molecular Engineering Peking University Beijing 100871 China Department of Chemistry Fuandan University and State Key Laboratory of Organometallic Chemistry Chinese Academy of Science Shanghai 200433 China

Direct alkylation of arenols with alky] organometallic reagents has never been approached, Herein we reported the first successful example of nickel-catalyzed methylation of arenols with methyl Grignard reagents to construct C（sp2）-C（sp3） bond under mild conditions. The transformation was compatible with broad substrate scope of 2-naphthol derivatives. Benzyl alcohol and biphenols were also suitable substrates for this methylation.

关键词： arenoi methylation nickel catalysis cross coupling