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Janus Quasi‑Solid Electrolyte Membranes with Asymmetric Porous Structure for High‑Performance Lithium‑Metal Batteries

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Nano-Micro Letters 2024年第6期16卷 221-232页

作者： Zerui Chen Wei Zhao Qian Liu Yifei Xu qinghe wang Jinmin Lin Hao Bin Wu Institute for Composites Science Innovation(InCSI)and State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027People’s Republic of China

Quasi-solid electrolytes(QSEs)based on nanoporous materials are promising candidates to construct high-performance Limetal batteries(LMBs).However,simultaneously boosting the ionic conductivity(σ)and lithium-ion transference number(t^(+)) of liquid electrolyte confined in porous matrix remains ***,we report a novel Janus MOFLi/MSLi QSEs with asymmetric porous structure to inherit the benefits of both mesoporous and microporous *** Janus QSE composed of mesoporous silica and microporous MOF exhibits a neat Li^(+) conductivity of 1.5.10^(–4)S cm^(−1) with t^(+) of 0.71.A partially de-solvated structure and preference distribution of Li^(+)near the Lewis base O atoms were depicted by MD ***,the nanoporous structure enabled efficient ion flux regulation,promoting the homogenous deposition of Li^(+).When incorporated in Li||Cu cells,the MOFLi/MSLi QSEs demonstrated a high Coulombic efficiency of 98.1%,surpassing that of liquid electrolytes(96.3%).Additionally,NCM 622||Li batteries equipped with MOFLi/MSLi QSEs exhibited promising rate performance and could operate stably for over 200 cycles at 1 *** results highlight the potential of Janus MOFLi/MSLi QSEs as promising candidates for next-generation LMBs.

关键词： Metal-organic frameworks Mesoporous silicas Quasi-solid electrolytes Janus structure Lithium-metal battery

Towards growth of pure AB-stacked bilayer graphene single crystals

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Nano Research 2024年第5期17卷 4616-4621页

作者： Xiaowen Zhang Tao Zhou Yunlong Ren Zuo Feng Ruixi Qiao qinghe wang Bin wang Jinxia Bai Muhong Wu Zhilie Tang Xu Zhou Kaihui Liu Xiaozhi Xu Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum MaterialsSchool of PhysicsSouth China Normal UniversityGuangzhou 510006China Guangdong-Hong Kong Joint Laboratory of Quantum Matter School of PhysicsSouth China Normal UniversityGuangzhou 510006China Physical Science and Engineering Division King Abdullah University of Science and TechnologyThuwal 23955–6900Saudi Arabia State Key Laboratory for Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsSchool of PhysicsPeking UniversityBeijing 100871China Institute for Frontier Science Nanjing University of Aeronautics and AstronauticsNanjing 210094China International Centre for Quantum Materials Collaborative Innovation Centre of Quantum MatterPeking UniversityBeijing 100871China Songshan Lake Materials Laboratory Institute of PhysicsChinese Academy of SciencesDongguan 523808China

Given its intriguing band structure and unique tunable bandgap,AB-stacked bilayer graphene has great potentials in the applications of high-end electronics,optoelectronics and *** epitaxial growth of AB-stacked single-crystal bilayer graphene films requires a strict AB-stacked lattice,identical orientations and seamless stitching of bilayer graphene ***,the particles inevitably present on the metal surface that produced during high temperature growth would induce random orientations,twisted stacking islands,and uncontrollable multilayers,which is a great challenge to ***,we propose a heat-resisting-box assisted strategy to produce nearly pure AB-stacked bilayer graphene single-crystal films on Cu/Ni(111)*** our technique,the particles on the Cu/Ni(111)surface are effectively eliminated,which greatly minimizes the occurrence of randomly twisted islands and uncontrollable *** as-grown AB-stacked bilayer graphene films show>99%alignment and>99%AB stacking *** work provides a promising method towards the growth of pure AB-stacked bilayer graphene single crystals and would accelerate its device applications.

关键词： bilayer graphene AB stacking uniform growth heat-resisting box

A Highly cis-Selective Cascade aza-Michael/Aldol Annulation of Tetrahydroisoquinolines with Ethyl(2-Formylphenyl) Vinylphosphonates to Construct cis-3-Aminomethyl-4-HydroxyPhosphadihydrocoumarins

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A Highly cis-Selective Cascade aza-Michael/Aldol Annulation ...

中国化学会·第十五届全国有机合成化学学术研讨会

作者： qinghe wang Huang Tiao 吴明书 College of Chemistry & Chemical Engineering Hainan Normal University 海南师范大学

Coumarins are common structural motifs that are found in a variety of natural products and *** them, 3,4-dihydrocoumarins have shown many biological activities such as anti-cancer, anti-inflammatory actions, anti-microbial properties, anti-tumor, anti-oxidation agents, etc. The organophosphorus compounds often exhibited biochemical activity similar to that of naturally occurring carboxylic acids and their derivatives. Therefore, as phosphorous analogues of dihydrocoumarin, the phosphadihydrocoumarins would have pharmacological activities similar to those described for *** a consequence, we were attracted in developing efficient methods for the construction of a number of phosphadihydrocoumarins, we devised a new synthetic intermediate based on vinylphosphonate and hope to use it as a new synthon for the construction of phosphadihydrocoumarins with the purpose of making focused chemical libraries useful for synthetic methodology research and drug discovery. Here in, we describe a highly cis-selective cascade aza-Michael/Aldol-like annulation of ethyl(2-formylphenyl)vinylphosphonates with tetrahydroisoquinolines for the construction cis-3-aminomethyl-4-hydroxyphosphadihydrocoumarins which could be readily converted into β-hydroxyl-β’-amino alkylphosphonates under simple *** is also worth noting that the direct accessing of 1,3-amino alcohols, which is attracting great attention in recently, was achieved in this process.

关键词： phosphadihydrocoumarin organophosphorus compound dihydrocoumarin

Copper(Ⅰ)-Catalyzed Cycloaddition between Azomethine Imines and vinylidene(bis)phosphonate under Additive-Free Conditions

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Copper(Ⅰ)-Catalyzed Cycloaddition between Azomethine Imines...

中国化学会第十四届全国有机合成化学学术研讨会

作者： Zhongxiang Zhu qinghe wang Dulin Kong Mingshu Wu Key Laboratory of Tropical Medicinal Plant Chemistry of the Ministry of Education College of Chemistry & Chemical EngineeringHainan Normal University

Many bicyclic polyhydropyrazolo[1,2-a]pyrazolone derivatives have important medicinal *** shown in Figure 1,compounds A and B are antibacterial agents that are analogues of penicillin and *** addition,nitrogen-containing bisphosphonate(N-BPs)drugs are used to treat a variety of bone resorption diseases,such as osteoporosis,Paget’s disease,and hypercalcemia due to *** are thought to act by inhibiting the enzyme farnesyl diphosphate synthase,resulting in inhibition of protein prenylation in *** is worth mentioning that most of the highly potent third-peneration BP drugs contain the nitrogen heterocyclic component in their molecular structures,as in risedronate and zoledronate,and for the treatment of bone diseases associated with excessive resorption,the cyclic nitrogen bisphosphonate(N-BPs)are up to 10,000-fold more active than the first-generation non-nitrogen containing BP,for example,***,the purposeful synthesis of new members of cyclic nitrogen containing N-BP family is of current interest for further development of more potent drugs.

关键词： azomethine imines vinylidene(bis)phosphonate cycloaddition

VARIABLE SELECTION BY PSEUDO WAVELETS IN HETEROSCEDASTIC REGRESSION MODELS INVOLVING TIME SERIES

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Acta Mathematica Scientia 2006年第3期26卷 469-476页

作者：王清河周勇 Department of Applied Mathematics University of Petroleum Shandong 257062China Institute of Applied Mathematics Academy of Mathematics and Systems Science The Chinese Academy of Sciences Beijing 100080China

A simple but efficient method has been proposed to select variables in heteroscedastic regression models. It is shown that the pseudo empirical wavelet coefficients corresponding to the significant explanatory variables in the regression models are clearly larger than those nonsignificant ones, on the basis of which a procedure is developed to select variables in regression models. The coefficients of the models are also estimated. All estimators are proved to be consistent.

关键词： Heteroscedastic regression models variable selection wavelets

考虑基体混凝土抗压强度影响的再生粗(细)骨料混凝土干燥收缩模型

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建筑结构学报 2020年第12期41卷 156-164页

作者：张欢王玉银耿悦王庆贺哈尔滨工业大学结构工程灾变与控制教育部重点实验室黑龙江哈尔滨150090 哈尔滨工业大学土木工程智能防灾减灾工业和信息化部重点实验室黑龙江哈尔滨150090 沈阳建筑大学土木工程学院辽宁沈阳110168

对已有研究中再生混凝土干燥收缩试验结果进行分析,发现再生细骨料对再生混凝土干燥收缩的影响随着基体混凝土强度的增大而降低,然而现有再生细骨料混凝土干燥收缩模型均未考虑基体混凝土强度的影响,这会高估采用源于高强混凝土的再生... 详细信息

对已有研究中再生混凝土干燥收缩试验结果进行分析,发现再生细骨料对再生混凝土干燥收缩的影响随着基体混凝土强度的增大而降低,然而现有再生细骨料混凝土干燥收缩模型均未考虑基体混凝土强度的影响,这会高估采用源于高强混凝土的再生细骨料配制的再生混凝土的干燥收缩变形。基于现有试验结果,引入基体混凝土抗压强度影响系数,对课题组前期提出的再生细骨料混凝土干燥收缩模型进行修正,所提出的修正模型对再生混凝土干燥收缩性能预测结果相对现有其他模型预测结果离散性更小、精度更高,线性回归系数为1.009,判定系数为0.841。在工程常见参数范围内,采用修正模型进行了系统的参数分析,以研究基体/再生混凝土强度、砂率、再生粗/细骨料取代率、再生粗/细骨料吸水率和环境相对湿度等参数对再生混凝土干燥收缩的影响。分析结果表明,再生细骨料取代率的影响随再生粗骨料取代率的增大而降低,但影响依然显著;随着基体混凝土抗压强度的提高,再生骨料对混凝土干燥收缩的影响显著降低,设计中需考虑该因素的影响。

关键词：再生混凝土再生细骨料再生粗骨料基体混凝土抗压强度干燥收缩模型

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再生混凝土抗折强度的影响因素及其计算方法

建筑结构学报 2019年第1期40卷 155-164页

作者：李孝忠王庆贺王玉银张欢哈尔滨工业大学结构工程灾变与控制教育部重点实验室黑龙江哈尔滨150090 哈尔滨工业大学土木工程智能防灾减灾工业和信息化重点实验室黑龙江哈尔滨150090 沈阳建筑大学土木工程学院辽宁沈阳110168

为研究掺入再生粗骨料对混凝土抗折强度的影响,进行了抗折强度试验研究,考虑的参数包括再生粗骨料取代率、基体混凝土水灰比、基体混凝土龄期、再生粗骨料级配、再生混凝土水灰比以及再生混凝土配制方法等,确定了再生混凝土抗折强度的... 详细信息

为研究掺入再生粗骨料对混凝土抗折强度的影响,进行了抗折强度试验研究,考虑的参数包括再生粗骨料取代率、基体混凝土水灰比、基体混凝土龄期、再生粗骨料级配、再生混凝土水灰比以及再生混凝土配制方法等,确定了再生混凝土抗折强度的关键影响因素。在总结了现有的再生混凝土抗折强度计算公式基础上,采用本文及已有文献的试验数据对各公式预测精度进行了分析。以此为基础,提出了考虑关键参数影响的再生混凝土抗折强度计算公式。研究结果表明:再生粗骨料取代率与粗骨料级配是再生混凝土抗折强度的主要影响因素,取代率为100%的再生混凝土抗折强度比普通混凝土低3.9%～26.8%,采用不同粗骨料级配的再生混凝土抗折强度相差可达15.5%;再生混凝土抗折强度降低幅度随混凝土水灰比的增大而增大,不同水灰比的再生混凝土抗折强度降低幅度相差可达14.7%,而且再生粗骨料对混凝土抗折强度的影响低于其对抗压强度的影响,导致现有的计算公式不能有效预测再生混凝土抗折强度;基于普通混凝土抗折强度计算公式形式,并考虑混凝土水灰比及再生粗骨料取代率综合影响的再生混凝土抗折强度计算公式具有较高的预测精度,公式预测结果与试验结果比值的均值为0.991,判定系数为0.772。

关键词：再生混凝土抗折强度抗折强度试验影响因素预测方法

An Efficient Catalyst-Free Multicomponent Synthesis Quinoline Derivatives via Friedel–Crafts Reaction in Water

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An Efficient Catalyst-Free Multicomponent Synthesis Quinolin...

中国化学会第十四届全国有机合成化学学术研讨会

作者： Dulin Kong Zhongxiang Zhu qinghe wang Qiang Lin Mingshu Wu Chemical Engineering College Nanjing University of Science and Technology School of Pharmaceutical Sciences Hainan Medical University Key Laboratory of Tropical Medicinal Plant Chemistry of the Ministry of Education College of Chemistry & Chemical Engineering Hainan Normal University

Quinoline derivatives have been widely used in the manufacture of dyes and the discovery of experimental drug candidates,and this scaffold has been found in numerous products with biological and pharmacological properties such as papaverine,camptothecine,XK469,R207910,Moxifloxacin and TMC 207.A variety of reactions *** reaction,Henry reaction and aldol reaction,Morita-Baylis Hillman reaction has been studied both‘in-water’and‘on-water’.However,the examples of catalyst free Friedel-Crafts reaction‘in-water’or‘on-water’are *** part of our continued interest in the synthesis of heterocyclic compounds and green chemistry,Along this line,we report a one pot condensation reaction of 1,3-dicarbonyl compounds,8-hydroxyquinoline and aromatic aldehydes under catalyst-free conditions via Friedel–Crafts reaction in water

关键词： quinoline water Friedel–Crafts reaction

An Efficient and Clean Sulfenylation of Imidazoheterocycles with Sulfonyl Hydrazides in Water

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An Efficient and Clean Sulfenylation of Imidazoheterocycles ...

中国化学会·第十五届全国有机合成化学学术研讨会

作者： Dulin Kong qinghe wang Tiao Huang Qiang Lin Mingshu Wu Chemical Engineering College Nanjing University of Science and Technology School of Pharmaceutical Sciences Hainan Medical University Key Laboratory of Water Pollution Treatment&Resource Reuse of Hainan province College of chemistry and chemical engineering Hainan Normal University 南京理工大学

Imidazo[1,2-a]pyridines are recognized to exhibit a broad range of applications in pharmaceuticals and optoelectronics. Several commercially available drugs have the imidazo[1,2-a]pyridines motif in their core structure, for example, the sedative Zolpidem, the anxiolytic Alpidem or Saripidem, or the heart failure drug *** the past decades, significant efforts have been made for the construction of substituted imidazo[1,2-a]pyridine *** part of our continued interest in the synthesis of heterocyclic compounds and green chemistry, Herein we report the possible use of water as an efficient medium to introduce Sulfenylation of Imidazoheterocycles under ligand or additive free conditions at 120 ℃ under air(Fig.1).

关键词： Imidazoheterocycles Sulfenylation Water