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Tetraolefin stereospecific photodimerization and photopolymerization in coordination polymers

Science China Chemistry 2022年第10期65卷 1867-1872页

作者： wei-jie gong Zhan-Yong Yang Yu-Xuan Hong Dong Liu Zheng Niu Pierre Braunstein Jian-Ping Lang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials School of Chemistry and Chemical EngineeringHuaiyin Normal UniversityHuaian 223300China Universitéde Strasbourg-CNRS Institut de Chimie(UMR 7177 CNRS)4 rue Blaise Pascal-CS 90032Strasbourg 67081France

In the context of the highly desirable design and preparation of smart materials with adjustable properties based on photoreactive compounds,we report two unique photoreactive coordination polymers(CPs),{[Zn(4-Iba)_(2)(4-tkpvb)]·H_()2O}_(n)(1,4-HIba=4-iodobenzoic acid,4-tkpvb=1,2,4,5-tetrakis(4-pyridylvinyl)benzene)and[Cd(1,4-bdc)(4-tkpvb)]_(n)(2,1,4-H_(2)bdc=1,4-benzenedicarboxylic acid).Depending on the metal ions and auxiliary carboxylate ligands used,the 4-tkpvb ligands in 1 and 2 adopt different mutual arrangements,which facilitate the photodimerization and photopolymerization reactions in single crystal to single crystal(SCSC)*** UV light irradiation which results in the dimerization of the 4-tkpvb ligands,the one-dimensional(1D)zigzag chainsof 1 are transformed into a two-dimensional(2D)network of{[Zn(4-Iba)_(2)(bpbtpvcb)_(0.5)]·H_(2)O}_(n)(1a,bpbtpvcb=1,3-bis(4-pyridyl)-2,4-bis(2,4,5-tri(2-(4-pyridyl)vinyl)phenylcyclobutane).Similarly,in the crystals of 2,all 4-tkpvb ligands experience a photopolymerization reaction to form an unprecedented 1D linear organic polymer,poly-1,3-bis(4-pyridyl)-2,5-bis(2-(4-pyridyl)-vinyl)phenyl)cyclobutane(poly-bpbpvpcb).Furthermore,the 2D network of 2 is converted into a three-dimensional(3D)framework of[Cd_(n)(1,4-bdc)_(n)(poly-bpbpvpcb)](2a).This work not only offers a new protocol to selectively synthesize new supramolecular cyclic compounds,but also expands the application of photopolymerization to the synthesis of macromolecules.

关键词： coordination polymers single-crystal to single-crystal transformation photodimerization photopolymerization cycloaddition

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A Sensitive Fluorescent Sensor for 4-nitrophenol in Aqueous Solution Based on a Cobalt（Ⅱ） Complex

A Sensitive Fluorescent Sensor for 4-nitrophenol in Aqueous ...

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中国化学会第九届全国无机化学学术会议

作者： wei-jie gong Hong-Xi Li Jian-Ping Lang College of Chemistry Chemical Engineering and Materials ScienceSoochow University

Detection of nitroaromatic compounds is important for national homeland security,military applications,forensic investigations,and environmental *** detection methods rely on trained sniffer dogs or sophisticated *** approaches need very expensive instruments and they are not easily accessible in most *** coordination polymers（CPs）or metal organic frameworks（MOFs）have proved to be attractive candidates for the detection of trace amounts of nitroaromatics.[1,2]This is mainly because can be efficiently modulated by both analyte–metal and analyte–ligand interactions and displays fast,highly sensitive,and reversible nitro-explosives sensing compared with other methods.[3]In this paper,we selected1,3,5-tri（4-vinylpyridyl）-benzene（tvpb）as a ligand to react with Co（NO3）2·6H2O and 2,2’-biphenyldicarboxylic acid（2,2’-H2bpdc）,producing one three-dimensional polymer[Co（tvpb）（2,2’-H2bpdc）]n（1）.In 1,each Co is coordinated by three O atoms from two bpdc ligands and three N atoms from three tvpb ligands（Fig.1a）.The average Co–O and Co–N bond lengths are 2.172（3）Aand 2.157（3）*** Co center and each tvpb ligand can be viewed as a 5-connected node and a 3-connected node,***,the structure of 1 can be simplified into a 3D（3,5）-connected topology（Fig.1b）.A finely ground sample of 1（2 mg）was suspended in 2 m L of water,sonicated for 1 h and exhibited an emission at 412 nm when excited at 291 *** 1 is very stable in water.A dispersed suspension of 1 in H2O also displays strong fluorescence emission and exhibits good selectivity and sensitivity toward nitroaromatic（Fig.1c）.

关键词： Cobalt(Ⅱ) complex 4-nitrophenol flourescent sensor luminescent quenching

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Photoinduced radical sulfur dioxide insertion with asymmetric cyclization of alkenes: accessing β-chiral sulfones bearing S-stereocentric cyclic sulfinamides

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Science China Chemistry 2025年第1期68卷 257-263页

作者： Jiapian Huang Chenxin Wang Xu Wang Xiaoyu Zhou wei Xiao jie Wu School of Pharmaceutical and Chemical Engineering & Institute for Advanced Studies Taizhou University State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences School of Chemistry and Chemical Engineering Henan Normal University

The generation of various β-chiral sulfones bearing chiral cyclic sulfinamides through photoredox-catalyzed sulfur dioxide insertion with asymmetric radical cyclization is described. This method features a broad substrate scope and excellent stereospecificity. Computational studies reveal that the dispersion interaction between sulfinyl group and CH2SO2Ph group plays a crucial role in the stereoselectivity control.

关键词： β-chiral sulfones chiral cyclic sulfinamides sulfur dioxide insertion asymmetric radical cyclization stereoselectivity

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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： jie Wang wei Wang Xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng Xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model

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太阳能热水地板采暖系统稳态换热过程的研究

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太阳能学报 1989年第4期10卷 342-350页

作者：郑维杰龚堡何梓年北京市太阳能研究所

本文以太阳能热水地板采暖系统为研究对象,对地板和房间做了综合换热分析,建立了系统的数学模型,并利用计算机进行数值求解。实验证明,本文建立的数学模型基本正确,提出的计算程序可以模拟此系统的换热过程,对不同情况下的系统设计和运... 详细信息

本文以太阳能热水地板采暖系统为研究对象,对地板和房间做了综合换热分析,建立了系统的数学模型,并利用计算机进行数值求解。实验证明,本文建立的数学模型基本正确,提出的计算程序可以模拟此系统的换热过程,对不同情况下的系统设计和运行具有指导意义。

关键词：太阳能热水地板采暖系统换热

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Recent progress on photoactive nonprecious transition-metal complexes

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Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang gong Hong-jie Zhang Yan Cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong gong Yong Chen Chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of Chemistry Chinese Academy of Sciences State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of Technology State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical Engineering Beijing Institute of Technology College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic Materials Wuhan University School of Chemistry and Chemical Engineering Anhui University Key Laboratory of Photochemical Conversion and Optoelectronic Materials & CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences

Photoactive complexes of nonprecious transition metals, mainly including those in the first-row and partially the second-row of the Periodic table of elements, have received increasing attention in view of their low cost and long-term sustainability. They are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices, artificial photosynthesis, photocatalysis, biodiagnostics, and therapeutics, etc. This review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes, including photoactive Zr, V, Cr, Mo, and W complexes, Mn complexes and hybrids, Fe, Co, Ni, and Cu complexes, and Zn and Cd complexes and hybrids. A particular focus is given on the molecular design, modulation of photophysical and photochemical properties, and applications of the representative and lately-developed nonprecious metal complexes. In addition, a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

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Impact of Individuals’ Fitness Expressions on Interactive Genetic Algorithms’ Performances

Impact of Individuals’ Fitness Expressions on Interactive G...

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2009中国控制与决策会议

作者： Dun-wei gong,jie Yuan School of Information and Electrical Engineering,China University of Mining and Technology,Xuzhou 221116,China

＜正＞Interactive genetic algorithms involve a user to evaluate an individual’s *** far,there have been many expressions of an individual’s fitness,but no mature result of their influences onlGAs’ performances has come *** review 5 representative fitness expressions in this paper,*** fitness,discrete fitness,interval fitness,fuzzy fitness,as well as the fitness not directly assigned by the *** a RGB color evolutionary system to collect data and based on many statistical methods,we analyze the impact of the above fitness expressions on interactive genetic algorithms’ performances in detail,and make a research on the user’s satisfaction *** achievements in this paper provide a foundation for choosing an appropriate fitness expression in real-world applications.

关键词： Genetic algorithm Interactive genetic algorithm Fitness Expression

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A low redox potential and long life organic anode material for sodium-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 557-564页

作者： Zhi Li Yang wei Kang Zhou Xin Huang Xing Zhou jie Xu Taoyi Kong Junwei Lucas Bao Xiaoli Dong Yonggang Wang Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Collaborative Innovation Center of Chemistry for Energy Materials (iChEM) Fudan University Department of Chemistry Boston College School of Materials Science and Engineering Anhui University of Technology

Sodium-ion batteries （SIBs） with organic electrodes are an emerging research direction due to the sustainability of organic materials based on elements like C,H,O,and sodium ***,organic electrode materials for SIBs are mainly used as cathodes because of their relatively high redox potentials（>1 V）.Organic electrodes with low redox potential that can be used as anode are ***,a novel organic anode material （tetrasodium 1,4,5,8-naphthalenetetracarboxylate,Na4TDC） has been developed with low redox potential （<0.7 V） and excellent cyclic *** three-sodium storage mechanism was demonstrated with various in-situ/ex-situ spectroscopy and theoretical calculations,showing a high capacity of 208 mAh/g and an average decay rate of merely 0.022%per ***,the Na4TDC-hard carbon composite can further acquire improved capacity and cycling stability for 1200 cycles even with a high mass loading of up to 20 mg *** pairing with a thick Na3V2（PO4）3cathode (20.6 mg cm-2),the as-fabricated full cell exhibited high operating voltage （2.8 V）,excellent rate performance and cycling stability with a high capacity retention of 88.7% after 200 cycles,well highlighting the Na4TDC anode material for SIBs.

关键词： Organic anode material Low redox potential Composite anode Sodium-ion batteries

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Ca2+ cation-mediated microenvironment for electrochemical hydrodimerization of furfural

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Science China Chemistry 2025年

作者： wei Du Shuangshuang Cha Can Lei Mengxin Qu Zhongqiang Deng Ming gong Xinhe Bao Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Fudan University State Key Laboratory of Catalysis National Laboratory for Clean Energy Collaborative Innovation Center of Chemistry for Energy Materials Dalian Institute of Chemical Physics Chinese Academy of Sciences

Furfural is one of the most important biomass-based platform molecules as sustainable precursors for chemicals and fuels. The electrochemical hydrodimerization of furfural can generate hydrofuroin, which is a promising precursor for gasoline or jet ***, steering the selectivity toward hydrodimerization under near-neutral conditions that suppress polymerization and disproportionation of furfural remains challenging. Herein, we discovered that tuning the electrolyte cations could be an effective and alternative strategy for modulating furfural reduction to the traditional electrocatalyst design. Under the optimal Ca2+cations,hydrofuroin yield could be much improved from other cations with hydrofuroin selectivity of 95.5%. The systematic characterization of the ion-centered double layer reflected the suitable sizes and charges of hydrated Ca2+for suppressing the hydrogen evolution reaction from activation of surrounding water molecules as well as encouraging furfural accumulation via non-covalent interaction for directing the electron transfer to furfurals. Ions with smaller or larger sizes can either activate local water molecules or form a crowded ionic interface that casts an adverse effect on furfural enrichment. This work not only presents an effective strategy for facilitating biomass valorization via hydrodimerization but also emphasizes the essential role of the ion-centered microenvironment for steering the electrocatalytic pathways.

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Substrate bias effects in p-channel GaN-on-Si transistors

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Science China(Information Sciences) 2025年第1期68卷 404-405页

作者： Mengyao ZHAO jie MA Lanlan YANG Chuanqi PAN Denggui WANG Jianjun ZHOU Sheng LI Jiaxing wei Long ZHANG Siyang LIU weifeng SUN National ASIC System Engineering Research Center School of Integrated Circuits Southeast University National Center of Technology Innovation for Electronic Design Automation Southeast University National Key Laboratory of Solid-State Microwave Devices and Circuits

The drain current （ID） of the n-channel GaN field-effecttransistor （n-FET） is influenced by the substrate-to-source bias voltage (VBS)（substrate bias effect）[1].Actually,nonzero VBSis also likely to occur in p-FET in real application,because the source electrode of p-FET is usually connected to high *** study reports the dependency between IDand VBSin p-FET for the first time,and analyzes the underlying mechanisms from the perspective of vertical electric field （EF） distribution.

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