检索结果-内蒙古大学图书馆

Palladium-Catalyzed[4+2]and[6+2]Dipolar Cycloadditions for the Construction of Benzo[d]isothiazole 1,1-Dioxide Fused 1,3-Oxazinanes and 1,3-Oxazocanes

引用

Chinese Journal of Chemistry 2024年第8期42卷 829-834页

作者： Lei Chen Hongling Xie Yu Xue Zhengyu Han Jianwei Sun Hai Huang Jiangsu Key Laboratory of Advanced Catalytic Materials&Technology School of Petrochemical EngineeringChangzhou UniversityChangzhouJiangsu213164 China Department of Chemistry The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina

Comprehensive Summary,The Pd-catalyzed dipolar cycloaddition represents a significant synthetic strategy for the construction of useful heterocyclic *** study developed the dipolar[4+2]and[6+2]cycloaddition reactions of benzo[d]isothiazole 1,1-dioxides(BDs)leading to the synthesis of BD-fused 1,3-oxazinane and 1,3-oxazocane derivatives,*** particular,the synthesis of BD-fused 1,3-oxazinanes demonstrated regio-and enantioselective characteristics,resulting in products with good yields,enantioselectivity and regioselectivity(if applicable).Furthermore,the[6+2]cycloaddition reaction developed in this work represented the first strategy for the synthesis of medium-sized ring compounds based on BDs.

关键词： Cycloaddition 1,3-Oxazinanes 1,3-Oxazocanes Medium-ring compounds Stereochemistry N-Heterocycles Sulfonamides Enantioselectivity Asymmetricsynthesis

来源：评论

学校读者我要写书评

暂无评论

Mechanochromism of polyurethane based on folding-unfolding of cyano-substituted oligo(p-phenylene)vinylene dimer

引用

Frontiers of Materials Science 2023年第2期17卷 169-180页

作者： Na Zhang Xiang-Yu Ma Shun Li Yu-Xin Zhang Chen Lv Zheng-Peng Mao Zi-Yi Dou Tai-Sheng Wang School of Materials Science and Engineering Nanjing Institute of TechnologyNanjing 211167China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing 211167China

The incorporation of mechanophores,motifs that transform mechanical stimulus into chemical reaction or optical variation,allows creating materials with stressresponsive *** most widely used mechanophore generally features a weak bond,but its cleavage is typical an irreversible ***,we showed that this problem can be solved by folding–unfolding of a molecular *** systematically studied the mechanochromic properties of polyurethanes with cyano-substituted oligo(p-phenylene)vinylene(COP)tweezer(DPU).As a control experiment,a class of polyurethanes containing only a single COP moiety(MPU)was also *** DPU showed prominent mechanochromic properties,due to the intramolecular folding–unfolding of COP tweezer under mechanical *** process was efficient,reversible and optical ***,due to the disability to form either intramolecular folding or intermolecular aggregation,the MPU sample was mechanical inert.

关键词： mechanochromism molecular tweezer folding-unfolding cyanosubstituted oligo(p-phenylene)vinylene polyurethane

来源：评论

学校读者我要写书评

暂无评论

Confinement of Fe atoms between MoS_(2) interlayers drives phase transition for improved reactivity in Fenton-like reactions

引用

Nano Research 2024年第3期17卷 1132-1139页

作者： Yibing Sun Yu Zhou Hongchao Li Chuan Wang Xuan Zhang Qian Ma Yingchun Cheng Jieshu Qian Bingcai Pan Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China Key Laboratory of Flexible Electronics and Institute of Advanced Materials Jiangsu National Synergetic Innovation Center for Advanced MaterialsNanjing Tech UniversityNanjing 211816China Department of General Dentistry Affiliated Stomatological Hospital of Nanjing Medical UniversityJiangsu Province Key Laboratory of Oral DiseasesNanjing 210029China Research Center for Environmental Nanotechnology(ReCENT) State Key Laboratory of Pollution Control and Resources ReuseSchool of EnvironmentNanjing UniversityNanjing 210023China

Phase manipulation of MoS_(2) from thermodynamically stable 2H phase to the unstable but more reactive 1T phase represents a crucial strategy for improving the reactivity in many *** widely adopted wet chemistry approach uses intercalating entities especially alkali metal ions to achieve the phase transition;however,these entities are normally inert for the target ***,we describe the first use of iron atoms for the intercalation of 2H-MoS_(2) layers,driving the partial transition from 2H to 1T ***,in the peroxymonosulfate(PMS)-based Fenton-like reactions,the interlayered confinement of Fe atoms not only activates the inert basal plane,but also adds more reactive Fe sites for the formation of metal-PMS complex as primary reactive species for pollutant *** the degradation of a model pollutant carbamazepine(CBZ),the Fe-intercalated MoS_(2) exhibits a first order rate constant 13.3 times higher than 2H-MoS_(2).This strategy is a new direction for manipulating the phase composition and boosting the catalytic reactivity of MoS_(2)-based catalysts in various scenarios,including environmental remediation and energy applications.

关键词： confinement MoS_(2) Fe atoms Fenton-like reactions hydrogen evolution reaction

来源：评论

学校读者我要写书评

暂无评论

O-doping strategy enabling enhanced chemical/electrochemical stability of Li_(3)InCl_(6) for superior solid-state battery performance

引用

Journal of Energy Chemistry 2024年第12期99卷 484-494页

作者： Qiyue Luo Chen Liu Lin Li Ziling Jiang Jie Yang Shaoqing Chen Xia Chen Long Zhang Shijie Cheng Chuang Yu State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina College of Energy Soochow Institute for Energy and Materials InnovationsJiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006JiangsuChina College of Physics and Energy Fujian Normal UniversityFuzhou 350117FujianChina

Solid-state electrolytes with high oxidation stability are crucial for achieving high power density allsolid-state lithium *** electrolytes are promising candidates due to their outstanding compatibility with cathode materials and high Li^(+)***,the electrochemical stability of chloride electrolytes is still limited,leaving them unsuitable for ultrahigh voltage ***,chemical compatibility issue between sulfide and halide electrolytes affects the electrochemical performance of all-solid-state ***,Li-ion conductor Li_(3+x)InCl_(6-x)O_(x) is designed to address these ***_(3.25)InCl_(5.75)O_(0.25)shows a Li-ion conductivity of 0.90 mS cm^(-1)at room temperature,a high onset oxidation voltage of 3.84 V,fewer by-products at ultrahigh operation voltage,and good chemical compatibility with Li_(5.5)PS_(4.5)Cl_(1.5).The Li_(3.25)InCl_(5.75)O_(0.25)@LiNi_(0.7)Co_(0.1)Mn_(0.2)O_(2)-Li_(3.25)InCl_(5.75)O_(0.25)-VGCF/Li_(3.25)InCl_(5.75)O_(0.25)/Li_(5.5)PS_(4.5)Cl_(1.5)/Li-In battery delivers good electrochemical performances at high operating *** work provides a simple,economical,and effective strategy for designing high-voltage all-solid-state electrolytes.

关键词： Li_(3)InCl_(6) O doping Wide electrochemical window Chemical stability Interfacial stability Superior electrochemical performance

来源：评论

学校读者我要写书评

暂无评论

Non-isothermal Crystallization and Thermal Transformation Behaviors of Plasma Sprayed Fe_(48)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2)Amorphous Coating

引用

Journal of Wuhan University of technology(Materials Science) 2024年第6期39卷 1397-1405页

作者： WANG Miqi ZHOU Zehua YI Yu ZHANG Xin SHI Fang Faculty of Mechanical and Material Engineering Huaiyin Institute of TechnologyHuai’an 223003China College of Materials Science and Engineering Hohai UniversityChangzhou 213200China Jiangsu Key Laboratory of Advanced Manufacturing Technology Huaiyin Institute of TechnologyHuai’an 223003China Research Laboratory of Computational Mechanics Huaiyin Institute of TechnologyHuai’an 223003China

The non-isothermal crystallization dynamic behavior and mechanism of plasma sprayed Fe_(48)Cr_(15)Mo_(14)C_(15)B_(6)Y_(2)coating were thoroughly *** phase transition and crystallization kinetics of the coating were elaborately investigated by differential scanning calorimetry(DSC),X-ray diffraction(XRD),scanning electron microscopy(SEM),and transmission electron microscopy(TEM).The findings reveal that the characteristic temperatures of the coating shift to an elevated temperature at a higher heating rate and the crystallization processes are thermally *** 3-rd step of crystallization processes is more susceptible to the continuously increased heating rate while the onset crystallization reaction is less sensitive to the continuously enhanced heating ***_(23)(C,B)_6 phase is inclined to precipitate than other crystal phases due to the substantial pre-generation ofα-*** onset nucleation and growth ofα-Fe crystals is tough due to a higher onset apparent activation ***,the transformation from Fe_(23)(C,B)_(6)to FeB is harder in comparison with the precipitation of other *** most parts of the three crystallization processes are dominated by three-dimensional diffusion model due to the fact that most values of local Avrami exponent are higher than 2.5.

关键词： plasma spraying non-isothermal crystallization phase transition diffusion mode

来源：评论

学校读者我要写书评

暂无评论

RGB-D visual saliency detection of stacked fruits under poor lighting

引用

International Journal of Agricultural and Biological Engineering 2025年第1期18卷 230-237页

作者： Chunjian Hua Xintong Zou Yi Jiang Jianfeng Yu Ying Chen School of Mechanical Engineering Jiangnan UniversityWuxi 214122JiangsuChina Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment&Technology Jiangnan UniversityWuxi 214122JiangsuChina School of Internet of Things Engineer Jiangnan UniversityWuxi 214122JiangsuChina

The saliency detection of the same kind of stacked fruits can assist robots in completing sorting tasks,which is an important prerequisite for the grading and packing of *** order to accurately obtain saliency targets of fruits in the same kind of stacked state under overexposure,non-uniform illumination,and low illumination,a method for detecting stacked fruits under poor illumination based on RGB-D visual saliency was *** on the Res2Net network,features from each layer of two images were *** realize the complementary advantages between RGB features and depth features,the input RGB images were preprocessed using depth weighting to obtain purified RGB *** increase the information interaction between branches of different scales and better balance the fusion features and modal exclusive features,a multi-scale progressive fusion module was *** minimize the difference between the initial saliency maps generated by different features and improve the accuracy of the final predicted saliency maps,a multi-branch hybrid supervised method was *** comprehensive experiments on the self-made dataset of the same kind of stacked fruits show that the proposed algorithm is superior to five state-of-the-art RGB-D SOD methods in four key indicators:S value,F value,and MAE value,which are 0.979,0.992,and 0.006,respectively,and the P-R curve,which is also closer to the upper right corner of the *** values demonstrate that the proposed algorithm can accurately obtain saliency targets in the same kind of stacked *** results of this study can promote the automatic development of the fruit production and packaging industry.

关键词： RGB-D salient object detection multi-branch fusion depth weighting mixed supervision same kind of stacked fruits

来源：评论

学校读者我要写书评

暂无评论

Tungsten-substituted zeolite-regulated unsaturated cobalt atoms for robust light alkane dehydrogenation

引用

Journal of Energy Chemistry 2025年第4期103卷 525-534页

作者： Xichen Yin Tianjun Zhang Yanhang Ma Qiming Sun Innovation Center for Chemical Science College of Chemistry Chemical Engineering and Materials Science Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University State Key Laboratory of New Pharmaceutical Preparations and Excipients College of Chemistry and Materials Science Hebei University Shanghai Key Laboratory of High-resolution Electron Microscopy & School of Physical Science and Technology Shanghai Tech University

The dehydrogenation of alkanes has emerged as a vital complementary process to address the increasing global demand for olefins.A key challenge remains in the construction of novel active centers that offer superior activity,stability,and ***,tricoordinated cobalt atoms were successfully fabricated through an in-situ ligand-protected synthesis by introducing tungsten atoms into zeolite *** unsaturated Co species efficiently activate C-H bonds while suppressing C-C bond cleavage,resulting in exceptional catalytic activity and olefin selectivity in both propane and ethane dehydrogenation *** optimized Co0.2%@0.01W-S-1 catalyst demonstrated an impressive propylene formation rate of 15.2 molC3H6gcC h-1at 823 K and an ethylene formation rate of 240.3molC2H4gCo-1h-1at 913 K,with propylene and ethylene selectivities of 99.0% and 97.5%,*** results not only significantly surpass conventional tetracoordinated Co catalysts but also rival some Pt-based catalysts under similar ***,the catalyst exhibited excellent stability in dehydrogenation reactions,with no significant loss in catalytic activity after five consecutive regeneration *** work offers valuable insights into the design of zeolite-supported non-precious metal catalysts with high activity and durability for efficient alkane dehydrogenation.

关键词： Ethane dehydrogenation Heterogeneous catalysis Propane dehydrogenation Tricoordinated cobalt Tungsten-substituted zeolite

来源：评论

学校读者我要写书评

暂无评论

Lattice water fuels acidic water oxidation

引用

Science China Chemistry 2024年第7期67卷 2132-2133页

作者： Minyue Zhao Jianyong Feng Zhaosheng Li Zhigang Zou Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesNanjing UniversityNanjing 210093China Jiangsu Key Laboratory for Nano Technology Nanjing UniversityNanjing 210093China

In comparison to commercial alkaline water electrolysis technologies,proton-exchange membrane water electrolyzers(PEMWEs)offer intriguing advantages for hydrogen production,such as high current density,compact system ... 详细信息

关键词： Lattice alkaline system

来源：评论

学校读者我要写书评

暂无评论

An Allochroic Molecular Cage Switch for Sensing and Capturing Organic Pollutants

引用

Chemical Research in Chinese Universities 2023年第2期39卷 310-317页

作者： JIA Yin FENG Fanda SONG Xinyu SHI Zhiqiang SUN Lin JIANG Ruiyu TANG Lanqin ZHANG Lei Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of TechnologyYancheng224051China State Key Laboratory of Coordination Chemistry Nanjing National Laboratory of MicrostructuresSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210093China

The adsorption method is considered to be one of the most promising organic pollutants emission reduction *** design and synthesis of high-performance porous adsorbents are one of the most important but challenging *** this work,we constructed a new class of porous molecular cage switches by a simple reaction using phenolphthalein as the raw *** molecular cage switches displayed interesting on-off behavior towards organic guests,which is highly responding to organic pollutants with rapid color change and is also able to adsorb these organic pollutants through an open-to-close *** molecular cage switch also has excellent regenerative cycling properties and water resistance,which is expected to be employed in the handling of organic pollutants in the future.

关键词： Porous organic cage Molecular switch Phenolphthalein Organic pollutant Sensor

来源：评论

学校读者我要写书评

暂无评论

Lipid-polymer hybrid nanoparticle with cell-distinct drug release for treatment of stemness-derived resistant tumor

引用

Acta Pharmaceutica Sinica B 2023年第3期13卷 1262-1273页

作者： Shiyang Shen Teng Li Jinyi Fan Quanlin Shao He Dong Xiao Xu Ran Mo State Key Laboratory of Natural Medicines Jiangsu Key Laboratory of Drug Discovery for Metabolic DiseasesCenter of Advanced Pharmaceuticals and BiomaterialsSchool of Life Science and TechnologyChina Pharmaceutical UniversityNanjing 210009China

Drug resistance presents one of the major causes for the failure of cancer *** stem-like cells(CSCs),a population of self-renewal cells with high tumorigenicity and innate chemoresistance,can survive conventional chemotherapy and generate increased ***,we develop a lipid-polymer hybrid nanoparticle for co-delivery and cell-distinct release of the differentiation-inducing agent,all-trans retinoic acid and the chemotherapeutic drug,doxorubicin to overcome the CSC-associated *** hybrid nanoparticles achieve differential release of the combined drugs in the CSCs and bulk tumor cells by responding to their specific intracellular signal *** the hypoxic CSCs,ATRA is released to induce differentiation of the CSCs,and in the differentiating CSCs with decreased chemoresistance,DOX is released upon elevation of reactive oxygen species to cause subsequent cell *** the bulk tumor cells,the drugs are released synchronously upon the hypoxic and oxidative conditions to exert potent anticancer *** cell-distinct drug release enhances the synergistic therapeutic efficacy of ATRA and DOX with different anticancer *** show that treatment with the hybrid nanoparticle efficiently inhibit the tumor growth and metastasis of the CSC-enriched triple negative breast cancer in the mouse models.

关键词： Drug delivery Lipid-polymer hybrid nanoparticle Chemotherapeutic resistance Cancer stem-like cell Differentiation therapy

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：