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sTuDY ON PYROLYsIs OF POLYPHENYLsILsEsQuIOXANE

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chinese Journal of Polymer science 2002年第6期20卷 573-577页

作者： jun Ma liang-he shi Jian-min Zhang Bai-yu li De-yan shen Jian Xu.s.a.e Key laboratory of Polymer Physics & chemistry center for molecular science, institute of chemistry,chinese academy of sciences, beijing 100080 china chinese Acad sci Inst Chem State Key Lab Polymer Phys & Chem Ctr Mol Sci Beijing 100080 Peoples R China

X-ray photoelectron spectroscopy and Raman spectroscopy were' used to determine the chemical change of polyphenylsilsesquioxane (PPsQ) during pyrolysis in flowing nitrogen. Two temperature ranges were found for pyrolysed PPsQ below and above 600degreesC, respectively. The former is related to the rearrangement of PPsQ backbone and the latter reflects that most of backbone structure of PPsQ might be broken down and unorganized. Carbon formed in carbonization of PPsQ sample pyrolysed at 900degreesC should be sp(3) bonded carbon with crystallite size effects or defects.

关键词： pyrolysis polyphenylsilsesquioxane

surface-targeted functionalization of nickel-rich cathodes through synergistic slurry additive approach with multi-level impact using minimal quantity

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Nano Research 2024年第1期17卷 333-343页

作者： Jing Zhang Jiapei li Longhao Cao Wenhua Cheng Ziyin Guo Xiuxia Zuo chao Wang Ya-jun Cheng Yonggao Xia Yudai Huang state Key laboratory of chemistry and utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China Ningbo institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315201China school of Materials science and Engineering Tongji UniversityShanghai 200240China center of Materials science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

liNi0.8Co0.1Mn0.1O_(2)(NCM811),a Ni-rich layered oxide,is a promising cathode material for high-energy density lithium-ion batteries(liBs).However,its structural instability,caused by adverse phase transitions and continuous oxygen release,as well as deteriorated interfacial stability due to excessive electrolyte oxidative decomposition,limits its widespread *** address these issu.s.a.new concept is proposed that surface targeted precise functionalization(sTPF)of the NCM811 cathode using a synergistic slurry additive(ssA)*** approach involves coating the NCM811 particle surface with 3-aminopropyl dimethoxy methyl silane(3-ADMs),followed by the precise deposition of ascorbic acid via an acid-base *** slurry additives induce the formation of an ultra-thin spinel surface layer and a stable cathode–electrolyte interface(CEI),which enhances the electrochemical kinetics and inhibits crack *** sTPF strategy implemented by the ssA approach significantly improves the cyclic stability and rate performance of the NCM811 cathode in both half-cell and full-cell *** work establishes a promising strategy to enhance the structural stability and electrochemical performance of nickel-rich cathodes and provides a feasible route to promote practical applications of high-energy density lithium-ion battery technology.

关键词： nickel-rich cathode slurry additive lithium-ion battery cathode–electrolyte interface ascorbic acid phase transition

Oxidation of n-Butanol and 2-Pentanol with molecular Oxygen in supercritical CO2

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chinese Chemical Letters 2003年第10期14卷 1070-1072页

作者： Yan Hong CHANG, Tao JIANG, liang GAO, Quo Ying ZHAO, Hai Xiang GAO, Zhong Hao li, jun Chun li, Zhi Min liu, Bu Xing HANcenter for molecular sciences, institute of chemistry, chinese academy of sciences,beijing 100080 center for molecular sciences Institute of Chemistry Chinese Academy of Sciences

Oxidation of n-butanol and 2-pentanol using molecular oxygen in supercritical (sC) CO2 with and without co-solvent is investigated. The results showed that the reaction selectivity is high when the reaction is carried out in sC CO2. It has been observed that co-solvent affects conversion and selectivity of the reaction considerably.

关键词： Oxidation,n-butanol 2-pentanol supercritical CO2 co-solvent.

Preface:special topic on rechargeable battery technology

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science china chemistry 2024年第1期67卷 1-3页

作者： Yu-Guo Guo Qiang Zhang jun Chen li-jun Wan CAs Key laboratory of molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China university of chinese academy of sciences Beijing 100049China beijing Key laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Frontiers science center for new Organic Matter Renewable Energy Conversion and Storage Center(RECAST)Haihe Laboratory of Sustainable Chemical TransformationsKey Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China

Rechargeable batteries play a major role in the transition from fossil energy to renewable energy and are considered the key-enabling decarbonization technology for several industries,including electronics,transportat... 详细信息

关键词： battery artificial technology

supramolecular systems for bioapplications:recent research progress in china

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science china chemistry 2024年第5期67卷 1397-1441页

作者： Yue-Yang liu Xiao-Yong Yu Yu-Chen Pan Hang Yin shuang chao Yujie li He Ma Minzan Zuo Kun-Xu Teng jun-li Hou Yong Chen Dong-sheng Guo Ruibing Wang Yuxin Pei Zhichao Pei Jiang-Fei Xu Xiao-Yu Hu Chunju li Qing-Zheng Yang Leyong Wang Yu liu Zhan-Ting li state Key laboratory of Organometallic chemistry Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional MoleculesShanghai Institute of Organic ChemistryChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 200032China department of chemistry Fudan UniversityShanghai 200438China College of chemistry State Key Laboratory of Elemento-Organic ChemistryCollaborative Innovation Center of Chemical Science and EngineeringNankai UniversityTianjin 300071China state Key laboratory of Quality Research in chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao 999078China College of chemistry&Pharmacy Northwest A&F UniversityYangling 712100China Key lab of Organic Optoelectronics&molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084China College of Materials science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Key laboratory of Radiopharmaceuticals Ministry of EducationCollege of ChemistryBeijing Normal UniversityBeijing 100875China Tianjin Key laboratory of structure and Performance for Functional Molecules College of ChemistryTianjin Normal UniversityTianjin 300387China state Key laboratory of Analytical chemistry for life science Jiangsu Key Laboratory of Advanced Organic MaterialsSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

supramolecular systems feature dynamic,reversible and stimuli-responsive characteristics,which are not easily achieved by molecular *** last decade has witnessed tremendous advances in the investigations of supramolecular systems for various bioapplications,which include drug delivery,anticancer therapy,antibacterial therapy,photodynamic therapy,photothermal therapy,combination therapy,antidotes for residual drugs or toxins,and bioimaging and ***-guest chemistry has played a key role in the development of such bioactive supramolecular systems,and natural macrocycles(such as cyclodextrins),synthetic macrocycles(such as calixarenes,cucurbit[n]urils,and pillararenes),and porous framework polymers(such as supramolecular organic frameworks and flexible organic frameworks)have been most successfully used as hosts to build different kinds of host-guest systems for attaining designed *** self-assembly of rationally designed amphiphilic molecules,macromolecules and polymers represent another important approach for the construction of supramolecular architectures with advanced *** this review,we summarize the important contributions made by chinese researchers in this field,with emphasis on those reported in the past five years.

关键词： host-guest chemistry drug delivery anticancer and antibacterial photodynamic therapy photothermal therapy antidote transmembrane channel bioimaging and biosensing

Recovery and in-situ reduction of precious metals by graphdiyne and graphdiyne oxide for antibacterial use

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Rare Metals 2024年第4期43卷 1747-1757页

作者： Ming-Ji Jiang Ya-Na Zhang ling-shen Meng Jing Kang Yong-jun li Alideertu Dong College of chemistry and Chemical Engineering Inner Mongolia UniversityHohhot010021China Engineering Research center of Dairy Quality and safety Control Technology Ministry of EducationInner Mongolia UniversityHohhot010021China department of chemistry University of ZurichCH-8057ZurichSwitzerland laboratory of Organic solids and beijing National laboratory for molecular sciences Institute of ChemistryChinese Academy of SciencesBeijing100190China

Based on the in-situ self-reduction and chemical stability,graphdiyne(GDY)and graphdiyne oxide(GDYO)are used as trapping agents to investigate the ability for recovering Au^(3+),Ag^+,and Pd^(2+)under different pH valu.s.a.d interfering *** strong acidity at pH=1,these two agents demonstrate high select recovery towards the three precious metal ions,which could be insitu reduced to nanoparticles(NPs).In addition,superparamagnetic Fe_(3)O_(4)NPs are deposited on the surfaces of GDY and *** magnetic responses enable GDYFe_(3)O_(4)to recover precious metals conveniently and efficiently by the aid of an external magnetic *** study also confirms the antibacterial activity of the as-recovered NPs deposited on GDY and GDYO against Escherichia coli and staphylococcus aureus(1×10^(5)colony-forming unit(CFu)·mL^(-1)),and the antibacterial rates are 100%.This strategy of recovering precious metals and subsequently reusing to combat pathogens will be of great significance for environmental remediation and biomedical applications.

关键词： Graphdiyne In-situ reduction Recovery Precious metals Antibacterial

solid-state lithium-ion batteries for grid energy storage:opportunities and challenges

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science china chemistry 2024年第1期67卷 43-66页

作者： Xin Chang Yu-Ming Zhao Boheng Yuan Min Fan Qinghai Meng Yu-Guo Guo li-jun Wan CAs Key laboratory of molecular Nanostructure and Nanotechnology CAS Research/Education Center for Excellence in Molecular SciencesBeijing National Laboratory for Molecular Sciences(BNLMS)Institute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China university of chinese academy of sciences Beijing 100049China

The energy crisis and environmental pollution drive more attention to the development and utilization of renewable *** the capricious nature of renewable energy resource,it has difficulty supplying electricity directly to consumers stably and efficiently,which calls for energy storage systems to collect energy and release electricity at peak *** to their flexible power and energy,quick response,and high energy conversion efficiency,lithium-ion batteries stand out among multiple energy storage technologies and are rapidly deployed in the *** superior performance and ensuring the safety of energy storage systems,intrinsically safe solid-state electrolytes are expected as an ideal alternative to liquid *** this review,we systematically evaluate the priorities and issues of traditional lithium-ion batteries in grid energy *** lithium-ion batteries containing liquid electrolytes,solid-state lithium-ion batteries have the potential to play a more significant role in grid energy *** challenges of developing solid-state lithium-ion batteries,such as low ionic conductivity of the electrolyte,u.s.a.le electrode/electrolyte interface,and complicated fabrication process,are discussed in ***,the safety of solid-state lithium-ion batteries is *** the obtained insights,inspiring prospects for solid-state lithium-ion batteries in grid energy storage are depicted.

关键词： lithium-ion batteries grid energy storage solid-state electrolytes interface stability

A Bioorthogonal Post-modification of N^(6)-Isopentenyl Adenosine i^(6) A RNA in live Cells

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CCs chemistry 2024年第9期6卷 2241-2253页

作者： li-jun Xie Hou-Ping Cheng Meng-Yuan Chen Xin Wang li liu Bi-Feng Yuan liang Cheng beijing National laboratory for molecular sciences(BNLMs) CAS Key Laboratory of Molecular Recognition and FunctionCAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing 100190 school of Public Health Wuhan UniversityWuhan 430071 university of chinese academy of sciences Beijing 100049

selective methods for modulating RNA epigenetic modifications within living cells and organisms represent attractive techniques for investigating biological functions and medicinal *** contrast to enzymatic methods,abiotic chemical modulation offers access to diverse new-to-natural *** herein report a visible light-assisted bioorthogonal reaction involving flavin mononucleotide,sodium azide,and blue light *** concert with previous chemical approaches mimicking the demodification pathway,our system functions as a powerful and selective post-modification enzyme that targets N^(6)-prenyl adenosine i^(6) A in RNA and enables the efficient construction of an artificial N^(6)-cyanomethyl adenosine(cnm^(6) A).Notably,most endogenous biomacromolecular functions,including other common RNA epigenetics,remained ***,we have successfully modified i^(6) A in tRNA to cnm^(6) A in human cells and establish this system as a bona fide bioorthogonal reaction with potential applications in chemical biology and in-cell modulation.

关键词： chemical post-modification bioorthogonal reactions RNA modifications N^(6)-isopentenyl adenosine N^(6)-cyanomethyl adenosine

Non-destructive buffer enabling near-infrared-transparent inverted inorganic perovskite solar cells toward 1400 h light-soaking stable perovskite/Cu(In,Ga)se_(2) tandem solar cells

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Journal of Energy chemistry 2024年第10期97卷 622-629,I0013页

作者： Yu Zhang Zhaoheng Tang Zhongyang Zhang Jiahong Tang Minghua li siyuan Zhu Wenyan Tan Xi Jin Tongsheng Chen Jinsong Hu chao Zhou Chunlei Yang Qijie liang Xugang Guo Weimin li Weiqiang Chen Yan Jiang MOE Key laboratory of laser life science&Guangdong Provincial Key laboratory of laser life science Guangzhou Key Laboratory of Spectral Analysis and Functional ProbesCollege of BiophotonicsSouth China Normal UniversityGuangzhou 510631GuangdongChina school of Materials science and Engineering Beijing Institute of TechnologyBeijing 100081China songshan lake Materials laboratory Dongguan 523429GuangdongChina department of Materials science and Engineering Guangdong Provincial Key Laboratory of Functional Oxide Materials and DevicesSouthern University of Science and TechnologyShenzhen 518055GuangdongChina beijing Advanced Innovation center for soft Matter science and Engineering College of Chemical EngineeringCollege of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China department of Physics Liaoning UniversityShenyang 110036LiaoningChina beijing National laboratory for molecular sciences(BNLMs) Institute of ChemistryChinese Academy of SciencesBeijing 100190China school of Physics and Materials science Guangzhou UniversityGuangzhou 510006GuangdongChina shenzhen institute of Advanced Technology Chinese Academy of SciencesShenzhen 18055GuangdongChina

Near-infrared(NIR)transparent inverted all-inorganic perovskite solar cells(PsCs)are excellent top cell candidates in tandem *** essential challenge is the replacement of metal contacts with transparent conductive oxide(TCO)electrodes,which requires the introduction of a buffer layer to prevent sputtering *** this study,we show that the conventional buffers(i.e.,small organic molecules and atomic layer deposited metal oxides)used for organic-inorganic hybrid perovskites are not applicable to all-inorganic perovskites,due to non-uniform coverage of the vulnerable layers underneath,deterioration upon ion bombardment and moisture induced perovskite phase transition,A thin film of metal oxide nanoparticles by the spin-coating method serves as a non-destructive buffer layer for inorganic ***-inorganic inverted near-infrared-transparent PsCs deliver a PCE of 17.46%and an average transmittance of 73.7%between 780 and 1200 *** combination with an 18.56%Cu(In,Ga)se_(2) bottom cell,we further demonstrate the first all-inorganic perovskite/CIGs 4-T tandem solar cell with a PCE of 24.75%,which exhibits excellent illumination stability by maintaining 86.7%of its initial efficiency after 1400 *** non-destructive buffer lays the foundation for efficient and stable NIR-transparent inverted inorganic perovskite solar cells and perovskite-based tandems.

关键词： CsPbI_(3)perovskite Inverted perovskite solar cells Tandem solar cells Buffer layer stability