检索结果-南通市图书馆

Correlation between hydration properties and electrochemical performances on Ln cation size effect in layered perovskite for protonic ceramic fuel cells

引用

Journal of Energy chemistry 2024年第1期88卷 1-9,I0001页

作者： Inhyeok Cho Jiwon Yun Boseok Seong Junseok Kim Sun Hee Choi Ho-Il Ji Sihyuk Choi Department of Mechanical Engineering Kumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Department of Aeronautics Mechanical and Electronic Convergence EngineeringKumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Center for Energy Materials Research Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Center for Hydrogen and Fuel Cell Research Clean Technology Research DivisionKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of Energy and Environmental Engineering University of Science and TechnologySeoul 02792Republic of Korea Nanomaterials Science and Engineering Korea University of Science and Technology(UST)KIST CampusSeoul 02792Republic of Korea

PrBa_(0.5)Sr_(0.5)Co_(1.5)Fe_(0.5)O_(5+δ)(PrBSCF) has attracted much research interest as a potential triple ionic and electronic conductor(TIEC) electrode for protonic ceramic fuel cells(PCFCs). The chemical formula for Pr BSCF is AA'B_(2)O_(5+δ), with Pr(A-site) and Ba/Sr(A'-site) alternately stacked along the c-axis. Due to these structural features, the bulk oxygen ion diffusivity is significantly enhanced through the disorder-free channels in the PrO layer;thus, the A site cations(lanthanide ions) play a pivotal role in determining the overall electrochemical properties of layered perovskites. Consequently, previous research has predominantly focused on the electrical properties and oxygen bulk/surface kinetics of Ln cation effects,whereas the hydration properties for PCFC systems remain unidentified. Here, we thoroughly examined the proton uptake behavior and thermodynamic parameters for the hydration reaction to conclusively determine the changes in the electrochemical performances depending on LnBa_(0.5)Sr_(0.5)Co_(1.5)Fe_(0.5)O_(5+δ)(LnBSCF,Ln=Pr, nd, and Gd) cathodes. At 500 ℃, the quantitative proton concentration of PrBSCF was 2.04 mol% and progressively decreased as the Ln cation size decreased. Similarly, the Gibbs free energy indicated that less energy was required for the formation of protonic defects in the order of Pr BSCF nd BSCF nd electrochemical performances in LnBSCF cathodes, PCFC single cell measurements and analysis of the distribution of relaxation time were further investigated.

关键词： Protonic ceramic fuel cell Cathode Triple ionic and electronic conductor Hydration property Proton uptake Gibbs free energy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mixed hetero-/homogeneous TiO_(2)/N-hydroxyimide photocatalysis in visible-light-induced controllable benzylic oxidation by molecular oxygen

引用

Chinese Journal of Catalysis 2021年第10期42卷 1700-1711页

作者： Igor B.Krylov Elena R.Lopat'eva Irina R.Subbotina Gennady I.Nikishin Bing Yu Alexander O.Terent'ev N.D.zelinsky institute of organic chemistry of the russian academy of sciences moscow 119991russian federation Mendeleev university of chemical technology of russia moscow 125047russian federation Green catalysis center college of chemistryzhengzhou universityzhengzhou 450001henanchina

Homogeneous and heterogeneous types of catalysis are frequently considered as separate disciplines or even opposed to each *** the present work,a new type of mixed het-ero-/homogeneous catalysis was demonstrated for the case of selective alkylarene oxidation by molecular *** proposed catalytic system consists of two widely available components:N-hydroxyphthalimide(NHPI,a homogeneous organocatalyst for free-radical chain reactions)and nanosized TiO_(2)(heterogeneous UV-active photoredox catalyst).The interaction of NHPI with TiO_(2) allows for a shift from UV to visible light photoredox activity and generation of phthalimide-N-oxyl(PINO)radicals that diffuse into the solution where NHPI/PINO-catalyzed free-radical chain reaction can proceed without the additional light input providing a fundamental increase in energy *** NHPI/TiO_(2) ratio controls the selectivity of oxidation affording preferential formation of hydroperoxide or ketone from alkylarene.

关键词： TiO_(2) Photoredox catalysis N-hydroxyphthalimide N-oxyl radicals Aerobic oxidation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis, Characterization and Crystal Structures of Lanthanide Phenoxyacetate Complexes with 1,10-Phenanthroline

引用

Chinese Journal of chemistry 2003年第4期21卷 409-414页

作者：邓洪蔡跃鹏巢晖陈春龙蒋才武陈超球计亮年 School of chemistry and Chemical Engineering&State Key Laboratory of Optoelectronic Materials andTechnologies Zhongshan University Department of chemistry Guangxi Teachers College Nanning State Key Laboratory of Bioorganic and Natural Products chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai 200032China

Three new lanthanide phenoxyacetate complexes with 1,10 phenanthroline, [nd(POA) 3(phen)] 2·2C 2H 5OH (1), [Eu(POA) 3 (phen)] 2·2C 2H 5OH (2) and [Sm(POA) 2(DMSO)(phen)] 2 (ClO 4) 2 (3) (POA=phenoxyacetate, phen=1,10 phenanthroline, DMSO=dimethyl sulfoxide), were synthesized and characterized by elemental analyses, IR, UV vis and FAB MS spectra. Their structures were determined by single crystal X ray diffraction analysis. In complexes 1 and 2, the carboxylate groups are bonded to Ln 3+ ion in three modes: the chelating bidentate, the bridging bidentate and the bridging tridentate. In complex 3, the carboxyl ate groups are bonded to Sm 3+ ion only involved in one mode: the bridging bidentate. The luminescence behavior of complex 2 was also studied by means of emission spectra.

关键词： lanthanide complex coordination polymer crystal structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

D-type neuropeptide decorated AIEgen/RENP hybrid nanoprobes with light-driven ROS generation ability for NIR-Ⅱ fluorescence imaging-guided through-skull photodynamic therapy of gliomas

Aggregate

引用

Aggregate 2024年第1期5卷 185-195页

作者： Xuelu He Yuan Luo Yanying Li Yuanbo Pan Ryan T.K.Kwok Lulu He Xiaolin Duan Pengfei Zhang Aiguo Wu Ben Zhong Tang Juan Li Ningbo Key Laboratory of Biomedical Imaging Probe Materials and Technology Zhejiang International Cooperation Base of Biomedical Materials Technology and ApplicationChinese Academy of Sciences(CAS)Key Laboratory of Magnetic Materials and DevicesNingbo Cixi Institute of Biomedical EngineeringZhejiang Engineering Research Center for Biomedical MaterialsNingbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingboP.R.China Guangdong Key Laboratory of Nanomedicine Shenzhen Engineering Laboratory of Nanomedicine and NanoformulationsCAS-HK Joint Lab for BiomaterialsResearch Laboratory for Biomedical Optics and Molecular ImagingShenzhen Key Laboratory for Molecular ImagingCAS Key Lab for Health InformaticsShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenP.R.China Department of chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and Reconstruction and Institute for Advanced StudyThe Hong Kong University of Science and Technology(HKUST)KowloonP.R.China School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhenP.R.China

Glioma is one of the most common malignant tumors of the central nervous system,leading high mortality rates in ***-induced emission(AIE)photosensitizers-based photodynamic therapy(PDT)has emerged as a promising therapeutic strategy for least-invasive treatment of glioma,which involves local irradiation of the tumor using an external near-infrared(NIR)***,most AIE photosensitizers suffered from poorly penetration of the visible light excitation,bad spatiotemporal resolution in deep tissues and low efficient blood-brain barrier(BBB)crossing ability,which greatly limited the clinical practice of AIE photosensitizers for especially deep-seated brain tumor *** this work,we developed a multifunctional NIR-driven theranostic agent through hybrid of AIE photosensitizers TInd with rare-earth doping nanoparticles(RENPs)NaGdF4:nd/Yb/Tm with up/down dual-mode conversion *** theranostic agent was further decorated with D-type neuropeptide DNPY for crossing BBB and targeting *** the 808-nm light irradiation,the down-conversion NIR-II luminescence could indicate the position glioma and the upconversion NIR-I luminescence could trigger the AIE photosensitizers producing reactive oxygen species to inhibit orthotopic glioma tumor growth in *** results demonstrate that the integration of Dtype neuropeptide,AIE photosensitizers and RENPs could be promising candidates for in vivo NIR-II fluorescence image-guided through-skull PDT treatments of brain tumors.

关键词： aggregation-induced emission D-type neuropeptide glioma photodynamic therapy rare-earth doping nanoparticles

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Recent advances on the synthesis and application of tetrahydro-γ-carbolines

引用

Chinese Chemical Letters 2023年第12期34卷 119-136页

作者： Haibo Mei Klára Aradi Loránd Kiss Jianlin Han Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry University institute of organic chemistry Research Centre for Natural Sciences Stereochemistry Research Group

Tetrahydro-γ-carbolines(THγ Cs) constitute one of the most important subtypes of indole alkaloids. In addition to being substructures of natural products, these structural motifs and moieties can often be found in pharmaceuticals due to their diverse bioactivities such as antiviral, antibacterial, antifungal,antiparasitic, antitumor, anti-inflammatory, and neuropharmacological activities. Beyond the pharmacological and biological aspects of these scaffolds, they have considerable synthetic applications for the construction of further bioactive compounds, too. The aim of this review is to summarize recent developments in the synthesis of this compound class.

关键词： Tetrahydro-γ -carbolines Synthetic methods Bioactive molecuels Asymmetric synthesis Indole Polycyclic compounds

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Kojic acid and maltol:The“Transformers”in organic synthesis

引用

Chinese Chemical Letters 2020年第12期31卷 2993-2995页

作者： Jianqiang Chen Lingwei Wu Jie Wu School of Pharmaceutical and Materials Engineering Eflnstitute for Advanced Studies Taizhou UniversityTaizhou 318000China State Key Laboratory of Organometallic chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

The deconstructive reorganization strategy for the synthesis of benzene-containing products from the kojic acid-and maltol-derived alkynes has been recently *** this strategy,kojic acid and maltol are analogous to the"Transformers",which can transform into benzofurans and benzaldehydes via annulation *** the synthetic standpoint,this deconstructive reorganization strategy features high atom economy,innate scalability and functional group *** the near future,we believe that this unique method will be widely investigated a nd other novel transformations of kojic acid and maltol will be discovered.

关键词： Kojic acids Maltols Rearrangement Deconstructive reorganization Benzofurans

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Balancing electron transfer and intermediate adsorption ability of metallic Ni-Fe-RE-P bifunctional catalysts via 4f-2p-3d electron interaction for enhanced water splitting

引用

Journal of Energy chemistry 2024年第7期94卷 458-465页

作者： Hong-Rui Zhao Cheng-Zong Yuan Chenliang Zhou Wenkai Zhao Lunliang Zhang Cong-Hui Li Lei Xin Fuling Wu Shufeng Ye Xiaomeng Zhang Yunfa Chen School of Rare Earths University of Science and Technology of ChinaHefei 230026AnhuiChina Jiangxi Province Research institute of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou 341119JiangxiChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Balancing electron transfer and intermediate adsorption ability of bifunctional catalysts via tailoring electronic structures is crucial for green hydrogen production,while it still remains challenging due to lacking efficient ***,one efficient and universal strategy is developed to greatly regulate electronic structures of the metallic Ni-Fe-P catalysts via in-situ introducing the rare earth(RE)atoms(Ni-Fe-RE-P,RE=La,Ce,Pr,and nd).Accordingly,the as-prepared optimal Ni-Fe-Ce-P/CC self-supported bifunctional electrodes exhibited superior electrocatalytic activity and excellent stability with the low overpotentials of 247 and 331 mV at 100 mA cm^(-2) for HER and OER,*** the assembled electrolyzer,the Ni-Fe-Ce-P/CC as bifunctional electrodes displayed low operation potential of 1.49 V to achieve a current density of 10 mA cm^(-2),and the catalytic performance can be maintained for 100 *** results combined with density functional theory(DFT)calculation reveal that Ce doping leads to electron decentralization and crystal structure distortion,which can tailor the band structures and d-band center of Ni-Fe-P,further increasing conductivity and optimizing intermediate adsorption *** work not only proposes a valuable strategy to regulate the electron transfer and intermediate adsorption of electrocatalysts via RE atoms doping,but also provides a deep under-standing of regulation mechanism of metallic electrocatalysts for enhanced water splitting.

关键词： RE atoms Electron transfer Adsorption energy Oxygen evolution Hydrogen evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

C-硝基吡唑类和C-硝基吡咯类对局部缺血损伤后眼血流量和视网膜功能恢复的作用(英文)

引用

Acta Pharmacologica Sinica 2002年第8期23卷 35-42页

作者： Bo XUAN, Tao WANG, George CY CHIOU, Igor L'vovich DALINGER, Tatyana Konstantinovna SHKINEVA, Svyatoslav Arkadievich SHEVELEVinstitute of Ocular Pharmacology and Department of Medical Pharmacology and Toxicology,Texas A&M University System Health Science Center, College Station, Texas 77843, USA nd zelinsky institute of organic chemistry, Russian Academy of Sciences, Leninsky Prospect 47, 119992, Moscow, Russia institute of Ocular Pharmacology and Department of Medical Pharmacology and Toxicology Texas A&M University System Health Science Center College Station 美国 Texas 77843 nd zelinsky institute of organic chemistry Russian Academy of Sciences Leninsky Prospect 47 俄罗斯 Moscow 119992 institute of Ocular Pharmacology and Department of Medical Pharmacology and Toxicology Texas A&M University System Health Science Center College Station 美国 Texas 88743

AIM: Effects of C-nitropyrazoles and C-nitroazoles on ocular blood flow and retinal .function recovery after ischemia have been studied. METHODS: The compounds were tested on ocular blood flow of ocular hyperten-sive (40 mmHg) rabbit eyes with colored microsphere technique. They were also tested on the retinal function recovery after ischemia of rat eyes with electroretinography. RESULTS: All compounds (DC-1 through DC-17) showed significant increase in retinal function recovery after ischemia in the range of 26 % to 120 % (Pnds (DC-1 through DC-5) studied, four compounds (DC-2 through DC-5) in-creased the blood flow in choroid, iris, and ciliary body, but not in retina. DC-1 did not show significant increase of blood flow in any of these ocular tissues. CONCLUSION: C-Nitropyrazoles can facilitate significant retinal function recovery after ischemic insult through the increase of ocular blood flow. Since rabbit's retina is scarce in vasculature, it did not show significant chang

关键词：吡唑类吡咯类眼高压视网膜电描记术局部缺血

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Impact and Friction Sensitivity of Energetic Materials：Methodical Evaluation of Technological Safety Features

引用

火炸药学报 2015年第3期38卷 1-8页

作者： Aleksandr Smirnov Oleg Voronko Boris Korsunsky Tatyana Pivina Bakhirev State Scientific Research institute of Mechanical Engineering DzerzhinskNizhny Novgorod Region 606002Russia institute of Problems of Chemical Physics Russian Academy of SciencesChernogolovkaMoscow Region142432Russia zelinsky institute of 0rganic chemistry Russian Academy of SciencesMoscow119991Russia

Key methods developed and used in the USSR and in the Russian Federation to determine the impact and friction sensitivity of energetic materials and explosives have been *** methodologies and instruments that underlie the assessment of their production and handling safety have been *** of a large number of compounds have revealed relationships between their sensitivity parameters and structure of individual compounds and *** range of change of physical and chemical characteristics for the compounds we examined covers the entire region of their *** methodology and equations have been formulated to estimate the impact and friction sensitivity parameters of energetic materials and to evaluate the technological safety in *** developed methodology is characterized by high-accuracy calculations and prediction of sensitivity parameters.

关键词： energetic materials experimental testing friction sensitivity impact sensitivity regressive analysis safety in use methodical evaluation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Well-defined bis(phenolate) lanthanide methoxides as efficient initiators for the polymerization of cyclic carbonate and lactide

引用

Chinese Science Bulletin 2007年第12期52卷 1623-1628页

作者： XU XiaoPing YAO YingMing ZHANG Yong SHEN Qi Key Laboratory of organic Synthesis of Jiangsu Province Department of Chemistry and Chemical Engineering Dushu Lake Campus Suzhou University Suzhou 215123 China State Key Laboratory of Polymer Physics and chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

Lanthanide methoxides supported by carbon-bridged bis(phenolate) ligands 2,2′-methylene-bis(6-tert- butyl-4-methylphenoxo) (MBMP2-) [(MBMP)Ln( μ-OMe)(THF)2]2 (Ln = nd (1), Yb (2)) were synthesized in high yields by the protolysis reaction using (C5H5)3Ln(THF) as starting materials, and complex 1 was structurally characterized. The coordination geometry around the center metal can be best described as a distorted octahedron. Complexes 1 and 2 were shown to be efficient initiators for the ring-opening polymerization of 2,2-dimethyltrimethylene carbonate (DTC) and L-lactide. The mechanism of DTC polymerization was explored by the end group analysis of the oligomer.

关键词：稀土元素甲醇盐二苯酚盐配体丙交酯碳酸盐聚合物

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

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：