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Tailoring two-dimensional surfaces with pillararenes based host-guest chemistry

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Chinese Chemical Letters 2020年第12期31卷 3095-3101页

作者： Run-Hao li Junkai Ma Yue Sun Haibing li Hubei Key Laboratory of Catalysis and Materials Science College of Chemistry and Material SciencesSouth-Central University for NationalitiesWuhan 430074China Hubei Key Laboratory of Wudang Local Chinese Medicine Research Department of ChemistrySchool ofPhannacyHubei University of MedicineShiyan 442000China Key Laboratory of Pesticide and Chemical Biology(CCNU) Ministry of EducationCollege of ChemistryCentral China Normal UniversityWuhan 430079China

The two-dimensional surfaces have been fueled by the infinite possibility they offe red fo r basic re search,and for novel technologies in *** realize many of these promises,the effective strategies were to design and control their surface chemistry,which plays a vital role in determining the chemical and physical *** host-guest chemistry with the reversible noncovalent interactions between macrocyclic hosts and suitable guests can be readily used for constructing multifunctional *** pillararenes,possessed the unique structure,have attracted the attentions of researchers in recent *** feature article covers the recent development of pillararene-based twodimensional inte rfaces,including the fabrication and function of the hybrid *** combination of pillararenes and materials platform exhibited the novel property because of the characte ristic of cavity of macrocyclic host and confined spaces of *** anticipate that this review will be helpful to the researchers working in the fields of supramolecular chemistry and materials science.

关键词： Pillararenes Host-guest chemistry Two-dimensional surfaces

Chemical ecology-driven discovery of bioactive marine natural products as potential drug leads

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Chinese Journal of Natural Medicines 2020年第11期18卷 837-838页

作者： li Xu-Wen State Key Laboratory of Dmg Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China

Over the past decades, more and more bioactive marine natural products(MNPs) have attracted numerous chemists and pharmacologists for their medicinal application. Up until now, nearly twenty MNPs-derived drugs have been successfully developed and are available on market. In this special issue, we are please to publish four original articles on MNPs, which represent the currently most studied marine living organisms, soft corals,sponges, and marine derived fungi, from far sea, deep sea or special mangrove living conditions.

关键词： drugs please sponge

Dual-function protective layer for highly reversible Zn anode

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Journal of Energy Chemistry 2024年第11期98卷 12-23页

作者： Jiaming li Hanhao liang Yini Long Xiao Yu Jiaqi li Nan li Junyi Han Jianglin Wang Zhanhong Yang Hunan Province Key Laboratory of Chemical Power Source College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083HunanChina Innovation Base of Energy and Chemical Materials for Graduate Students Training Central South UniversityChangsha 410083HunanChina

The thermodynamic instability of zinc anodes in aqueous electrolytes leads to issues such as corrosion,hydrogen evolution reactions(HER), and dendrite growth, severely hindering the practical application of zinc-based aqueous energy storage devices. To address these challenges, this work proposes a dualfunction zinc anode protective layer, composed of Zn-Al-In layered double oxides(ILDO) by rationally designing Zn-Al layered double hydroxides(Zn-Al LDHs) for the first time. Differing from previous works on the LDHs coatings, firstly, the ILDO layer accelerates zinc-ion desolvation and also captures and anchors SO_(4)^(2-). Secondly, the in-situ formation of the Zn-In alloy phase effectively lowers the nucleation energy barrier, thereby regulating zinc nucleation. Consequently, the zinc anode with the ILDO protective layer demonstrates long-term stability exceeding 1900 h and low voltage hysteresis of 7.5 m V at 0.5 m A cm^(-2) and 0.5 m A h cm^(-2). Additionally, it significantly enhances the rate capability and cycling performance of Zn@ILDO//MnO_(2) full batteries and Zn@ILDO//activated carbon zinc-ion hybrid *** simple and effective dual-function protective layer strategy offers a promising approach for achieving high-performance zinc-ion batteries.

关键词： Protection layer Zn-Al-In layered double oxide Captures and anchors SO_(4)^(2-) Zn-In alloy phase Zn metal anode

ZIF-7@carbon composites as multifunctional interlayer for rapid and durable li-S performance

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Journal of Energy Chemistry 2021年第6期30卷 19-27,I0002页

作者： Xingbo Wang Yan Zhao Feichao Wu Shuming liu Zisheng Zhang Zhaoyang Tan Xiaohang Du Jingde li Hebei Provincial Key Laboratory of Green Chemical Technology and High Efficient Energy Saving Tianjin Key Laboratory of Chemical Process SafetySchool of Chemical Engineering and TechnologyHebei University of TechnologyTianjin 300130China School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Department of Chemical and Biological Engineering University of OttawaOttawaON K1N 6N5Canada

The notorious"shuttle effect"of polysulfide during charge-discharge process induces grievous capacity fading,while the sluggish polysulfide conversion kinetics significantly hinders the development of practically viable lithium-sulfur(li-S)*** this study,a novel ZIF-7@carbon composite with ZIF-7 sheets vertically rooted on carbon cloth was developed as multifunctional interlayer to address these *** composite shows directional layered structure with outstanding compactness,and thus can provide massive active sites for accelerated redox *** pore channels are perpendicular to the square surface,resulting in extremely high utilization of one-dimensional ***,this structure can not only maintain the structural stability during the charge-discharge process by providing enough space for volume expansion,but also contribute to efficient exposure and utilization of active sites for the physical/chemical adsorption and catalytic conversion of *** a result,li-S batteries with the as-developed interlayer deliver a considerable areal capacity of 4.75 mAh cm^(-2) at an elevated sulfur loading of 5.5 mg cm^(-2),and an impressive cyclability with an extremely low capacity-fading rate of merely 0.04%per cycle over 500 cycles at 1 C.

关键词： lithium-sulfur batteries Interlayer ZIF-7 sheets High sulfur loading

Variation of mechanical properties and microstructure of hot-rolled AA2099 Al-li alloy induced by the precipitation during preheating process

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Journal of Materials Science & Technology 2022年第15期110卷 198-209页

作者： Fei Guo Weijiu Huang Xusheng Yang Haipeng Dong Hang Yu Qiuyu Chen li Hu Luyao Jiang College of Materials Science and Engineering Chongqing University of TechnologyChongqing 400054China College of Materials Science and Engineering Chongqing University of Arts and ScienceChongqing 402160China Chongqing Materials Research Institute Co. LtdChongqing 400707China

Preheating is the first step for thermal-mechanical processing of the materials. Several preheating schedules were designed based on industrial manufacturing to explore their effect on the microstructure and mechanical properties of AA2099 Al-li alloy during the following hot rolling. The results show that the mechanical properties of as-rolled sheets are quite sensitive to preheating. Various types of secondary phases, including δ', T1 and T2 phases, were precipitated during the heating process. The difference among precipitates is the main reason to induce the variation of mechanical properties for as-rolled sheets. A rapid heating rate gave rise to the precipitation of δ' phase, which largely promoted yield stress and ultimate tensile strength in as-rolled sheets. T1 phase was more favorable in the preheating with a holding period at 150–250 °C, which caused a moderated strain hardening behavior. Precipitates formed during preheating induced different slip behaviors in the following deformation. The coexistence of T1 and δ' phase could restrict planar slip, which inhibited the formation of the shear band. The difference in the activity of non-octahedral slips and planar slips determined the strain hardening effect, which should be the reason for the variation of mechanical properties of as-rolled sheets.

关键词： Aluminum-lithium alloys Preheating Precipitation Mechanical properties Shear band

Regularity of the Density for the Total Weighted Occupation Measure of Super-Brownain Motion

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Acta Mathematica Sinica,English Series 2011年第8期27卷 1557-1572页

作者： Rong li liU Department of Mathematics Nanjing University Nanjing 210093 P. R. China

Let （Xt） be a super-Brownian motion in a bounded domain D in R^d. The random measure Y^D（.） = ∫o^∞ Xt（.）dt is called the total weighted occupation time of （Xt）. We consider the regularity properties for the densities of a class of yD. When d = 1, the densities have continuous modifications. When d ≥ 2, the densities are locally unbounded on any open subset of D with positive y D （dx）-measure.

关键词： Superprocesses Poisson point processes regularity total weighted occupation time

Research of li4SiO4 irradiation tritium production device

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Nuclear Science and Techniques 2013年第B12期24卷 83-87页

作者： ZHANG Zhihua MI Xiangmiao YE Mao QIAN Dazhi li Rundong FENG Qijie Institute of Nuclear Physics and Chemistry China Academy of Engineering Physics Mianyang 621900 China

Tritium self-sustain and circulation is the core problem to use fusion energy peacefully. As the core component of the breeder in-pile irradiation test, the irradiation tritium production device provides irradiation space for breeders' tritium production and release. We take the li4SiO4 as the research object and design the structure of the irradiation device. We complete the physical parameters computation, the irradiation device safety analysis and the flow field analysis of the breeder refueling, realizing the adjusting of the breeder irradiation temperature and the tritium release temperature window and making the control of gas operational parameters come true. The data could provide reference for breeders' in-pile irradiation research.

关键词：照射生产设备硅酸锂氚生产装置温度调节科研育种饲养员

Recent development in SU（3） covariant baryon chiral perturbation theory

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Frontiers of physics 2013年第3期8卷 328-348页

作者： li-Sheng Geng School of Physics and Nuclear Energy Engineering Beihang University Beijing 100191 China International Research Center for Nuclei and Particles in the Cosmos Beihang University Beijing 100191 China

Baryon chiral perturbation theory （BChPT）, as an effective field theory of low-energy quantum chromodynamics （QCD）, has played and is still playing an important role in our understanding of non-perturbative strong-interaction phenomena. In the past two decades, inspired by the rapid progress in lattice QCD simulations and the new experimental campaign to study the strangeness sector of low-energy QCD, many efforts have been made to develop a fully covariant BChPT and to test its validity in all scenarios. These new endeavours have not only deepened our understanding of some long-standing problems, such as the power-counting-breaking problem and the convergence problem, but also resulted in theoretical tools that can be confidently applied to make robust predic- tions. Particularly, the manifestly covariant BChPT supplemented with the extended-on-mass-shell （EOMS） renormalization scheme has been shown to satisfy all analyticity and symmetry constraints and converge relatively faster compared to its non-relativistic and infrared counterparts. In this article, we provide a brief review of the fully covariant BChPT and its latest applications in the u, d, and s three-flavor sector.

关键词： chiral Lagrangians lattice QCD calculations baryon resonances hyperons

A novel satellite-equipped receiver for autonomous monitoring of GNSS navigation signal quality

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Science China(Technological Sciences) 2016年第7期59卷 1137-1146页

作者： YANG Jian YANG YiKang li Ji Sheng li HengNian YANG TianShe School of Electronic and Information Engineering Xi'an Jiaotong University Xi'an 710049 China State Key Laboratory of Astronautic Dynamics (ADL) Xi'an Satellite Control Center Xi'an 710043 China

Global navigation satellite system(GNSS) comes with potential unavoidable application risks such as the sudden distortion or failure of navigation signals because its satellites are generally operated until failure. In order to solve the problems associated with these risks, receiver autonomous integrity monitoring(RAIM) and ground-based signal quality monitoring stations are widely used. Although these technologies can protect the user from the risks, they are expensive and have limited region coverage. Autonomous monitoring of satellite signal quality is an effective method to eliminate these shortcomings of the RAIM and ground-based signal quality monitoring stations; thus, a new navigation signal quality monitoring receiver which can be equipped on the satellite platform of GNSS is proposed in this paper. Because this satellite-equipped receiver is tightly coupled with navigation payload, the system architecture and its preliminary design procedure are first introduced. In theory, code-tracking loop is able to provide accurate time delay estimation of received signals. However, because of the nonlinear characteristics of the navigation payload, the traditional code-tracking loop introduces errors. To eliminate these errors, the dummy massive parallel correlators(DMPC) technique is proposed. This technique can reconstruct the cross correlation function of a navigation signal with a high code phase resolution. Combining the DMPC and direct radio frequency(RF) sampling technology, the satellite-equipped receiver can calibrate the differential code bias(DCB) accurately. In the meantime, the abnormities and failures of navigation signal can also be monitored. Finally, the accuracy of DCB calibration and the performance of fault monitoring have been verified by practical test data and numerical simulation data, respectively. The results show that the accuracy of DCB calibration is less than 0.1 ns and the novel satellite-equipped receiver can monitor the signal qualit

关键词： satellite-equipped receiver dummy massive parallel correlators(DMPC) differential code bias(DCB) signal quality monitoring