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Dense carbon nanofiber self-supporting electrode fabricated by orientation/compaction strategy for high volumetric lithium storage capacity

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Progress in Natural Science:Materials International 2025年第1期35卷 229-237页

作者： Haihui Liu Chaoqun Chen Qiang Xu Yan Song Xiangwu Zhang Chang Ma Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology Tiangong University CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science Wilson College of Textiles North Carolina State University

Low bulk density greatly restricts the large-scale application of electrospun carbon-based fiber membrane as electrode in energy storage devices. To solve the above challenges, herein an orientation-compaction densification strategy is proposed to enhance the bulk density and volumetric capacity of PAN-based carbon nanofiber membranes as self-supporting electrode used in lithium-ion batteries（LIBs）. Specifically, highly-oriented fibers are achieved by high-speed roller collecting during electrospinning, and compaction densification is conducted by hot-pressing treatment. The effects of collecting speed and hot-pressing pressure on the morphology, conductivity,bulk density, tensile strength, and flexibility of the obtained carbon nanofiber membrane are *** to conventional fiber membranes, of which fibers are disorderly stacked, the oriented fiber membrane is much easier to achieve dense stacking by compaction. The obtained dense carbon nanofiber membrane demonstrates a bulk density of 0.566 g cm-3, and shows a significantly-enhanced volumetric capacity(318.3 mA h cm-3), high-rate performance(86.6 mA h cm-3at 5 A g-1), and satisfactory cycling stability when used as selfsupporting electrode of LIBs.

关键词： Bulk density Densification Electrospinning Orientation-compaction Volumetric capacity

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Niobium oxide/MXene heterostructure for simultaneous production of ammonia and energy via rechargeable Zn-N_(2)battery system

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Journal of Energy Chemistry 2025年第4期103卷 448-457页

作者： Xinyu Dai Wei Zhang Ying Sun Zhenyi Du Zhanliang Tao Jingang Wang Wenhui Fang Xuehan Xing Yang Chen Hui Li Hao Zheng Jieshan Qiu Tianyi Ma Institute of Clean Energy Chemistry Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials of Liaoning ProvinceCollege of ChemistryLiaoning UniversityShenyang 110036LiaoningChina State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan 030024ShanxiChina Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) Renewable Energy Conversion and Storage CenterCollege of ChemistryNankai UniversityTianjin 300071China College of Science Liaoning Petrochemical UniversityFushun 113001LiaoningChina College of Chemical Engineering State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing 100029China Centre for Atomaterials and Nanomanufacturing(CAN) School of ScienceRMIT UniversityMelbourne VIC 3000Australia ARC Industrial Transformation Research Hub for Intelligent Energy Efficiency in Future Protected Cropping(E2Crop) Melbourne VIC 3000Australia College of Chemical State Key Laboratory of Chemical Resource EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Aqueous Zn-N_(2)batteries with unique configuration are of potential for simultaneous N_(2)electro reduction and electricity generation,in which the electrocatalysts are critical for improving the NH_(3)yield and the energy ***,a heterostructure Nb_(2)O_5/Nb_(2)CT_(x)with abundant exposed Nb active sites and tuned electron density has been synthesized by in situ formation and anchoring of Nb_(2)O_5 nanoparticles on the surface of Nb_(2)CT_(x)MXene,which shows an enhanced N_(2)adsorption/activation *** heterostructure Nb_(2)O_(5/)Nb_(2)CT_(x)was used as the cathode of Zn-N_(2)battery that can deliver a peak power density of 1.25 mW cm^(-2)in 1.0 M KOH and can continuously produce NH_(3)with a yield of3.62μg h^(-1)mg_(ca)^(t-1).The NH_(3)formed in the battery system can be easily collected as a net product without circulating the ***,the Nb_(2)O_(5/)Nb_(2)CT_(x)has a long durability,evidenced by 70 h of operation at-0.4 V *** hydrogen electrode,which is the highest among the MXene-based electrocatalysts reported thus *** work may provide a new methodology based on Zn-N_(2)battery for sustainable and large-scale NH_(3)production with minimal energy consumption.

关键词： NH_(3)production Zn-N_(2)battery N_(2)Electroreduction Nb_(2)O_5/Nb_(2)CT_(x)heterostructure

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Thermal strain engineering in cobalt-coordinated Mo_(2)N for efficient ampere-level current density alkaline fresh/seawater hydrogen evolution electrocatalysis

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Journal of Energy Chemistry 2025年第4期103卷 282-293页

作者： Yuwen Hu Meilian Tu Tuzhi Xiong Yanxiang He Muhammad Mushtaq Hao Yang Zeba Khanam Yongchao Huang Jianqiu Deng M.-Sadeeq Balogun College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean EnergyHunan UniversityChangsha 410082HunanChina School of Chemistry and Chemical Engineering University of South ChinaHengyang 421001HunanChina School of Chemistry&Chemical Engineering Guangxi Key Laboratory of Electrochemical Energy MaterialsGuangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource DevelopmentGuangxi UniversityNanning 530004GuangxiChina Institute of Environmental Research at Greater Bay Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006GuangdongChina Guangxi Key Laboratory of Information Materials Guilin University of Electronic TechnologyGuilin 541004GuangxiChina State Key Laboratory of Non-Food Biomass and Enzyme Technology Guangxi Academy of SciencesNanning 530007GuangxiChina

Lattice-strain engineering has demonstrated its capability to influence the electronic structure and catalytic performance of ***,we present a facile method for inducing thermal strain in cobalt/molybdenum nitride rod-shaped structures(denoted Co/Mo_(2)N)via ammonia-assisted reduction,which effectively modulating the HER *** optimized Co/Mo_(2)N-500,characterized by 3%tensile lattice strain,demonstrates exceptional HER activity with lower overpotentials of140 mV and 184 mV at high current density of 1000 mA cm^(-2)in alkaline freshwater and seawater electrolytes,***/Mo_(2)N also exhibits excellent long-term durability even at a high current density of 300 mA cm^(-2),surpassing its counterparts and benchmark Pt/C *** functional theory calculations validate that the tensile strain optimizes the d-band states,water dissociation,and hydrogen adsorption kinetics of the strained Mo_(2)N in Co/Mo_(2)N,thereby improving its catalytic *** work provides valuable insights into controlling lattice strain to develop highly efficient electrocatalysts towards advanced electrocatalytic applications.

关键词： Co/Mo_(2)N Thermal strain engineering Hydrogen evolution reaction Ampere-level current density Seawater splitting

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Recent progress in metal-organic frameworks(Part Ⅱ—material application)

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Science China Chemistry 2025年第5期68卷 1642-1702页

作者： Jiandong Pang Wentao Jiang Xue-Wen Zhang Hao-Long Zhou Yuxiu Sun Wei Gong Bin Wang Fuyin Ma Linwei He Long Chen Qiang Chen He-Qi Zheng Yuanjing Cui Wen-Jie Shi Chao Zhang Mei Wang Yue-Biao Zhang Jie-Peng Zhang Chongli Zhong Yong Cui Shuao Wang Jian-Rong Li Guodong Qian Tong-Bu Lu Huan Pang Xian-He Bu School of Materials Science and Engineering Nankai University School of Physical Science and Technology Shanghai Tech University MOE Key Laboratory of Bioinorganic and Synthetic Chemistry GBRCE for Functional Molecular EngineeringSchool of ChemistryIGCMESun Yat-sen University Department of Chemistry Shantou University School of Chemical Engineering and Technology Tiangong University School of Chemistry and Chemical Engineering Shanghai Jiao Tong University State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary SciencesSoochow University College of Materials Science & Engineering Beijing University of Technology State Key Laboratory of Silicon and Advanced Semiconductor Materials Cyrus Tang Center for Sensor Materials and ApplicationsSchool of Materials Science & EngineeringZhejiang University Institute for New Energy Materials and Low Carbon Technologies School of Materials Science and EngineeringTianjin University of Technology School of Chemistry and Chemical Engineering Yangzhou University

As a class of functional crystalline porous materials, metal-organic frameworks(MOFs) gained rapid development in the past three decades and a large number of MOFs with ordered structures, high surface areas, and functionalized channels have been investigated. MOFs and MOF-derived/composite materials show great potential in many application fields. In this review, we discussed the main applications of MOFs and MOF-derived/composite materials in small molecule storage, separation, luminescence, sensing, multitype catalysis, and energy storage. In addition, challenges and problems in the future research of MOFs-related fields are also discussed.

关键词： metal-organic frameworks storage and separation sensing and detection multitype catalysis energy storage

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Uniform Ag_(6)Mo_(10)O_(33) meso/nanowires:High-efficient fabrication,novel growth mechanism,and reversibly high-energy sodium-ion battery

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Nano Research 2025年第4期18卷 189-198页

作者： Yuqing Yang Juan Liu Meiqi Zhang Qing Wang Ziqing Gui Xucheng Gu Chunsheng Li Yan Sun Yuxuan Sun Lianghuan Qin Yuzhen Zhao Wanzheng Lu Xiaofang Xu Xufeng Wang Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of China School of Chemistry and Life SciencesSuzhou University of Science and TechnologySuzhou 215009China Xi’an Key Laboratory of Advanced Photo-electronics Materials and Energy Conversion Device School of Electronic InformationXijing UniversityXi’an 710123China School of Safety Science and Engineering Changzhou UniversityChangzhou 213164China Suzhou Key Laboratory of Biophotonics School of Optical and Electronic InformationSuzhou City UniversitySuzhou 215104China State Key Laboratory of Advanced Chemical Power Sources Guizhou Meiling Power Sources Co.LtdZunyi 563003China

Silver molybdate(Ag_(6)Mo_(10)O_(33))exhibits excellent catalytic properties and photocatalytic degradation owing to its unique chemical and structural characteristics,but its prospective applications in electrochemistry energy storage have not received sufficient ***,the Ag_(6)Mo_(10)O_(33) meso/nanowires with superior morphological characteristics are fabricated employing a high-efficient microwave irradiation ***,the novel synthesizing mechanism of ultralong Ag_(6)Mo_(10)O_(33) mesowires is also proved to be a“self-assembly-dissolution-recrystallization-Ostwald-ripening”process,by exploring through the parallel experiments on the dramatic alterations in topology and size of Ag_(6)Mo_(10)O_(33) at continuous reaction ***,the properties of the ultralong uniform Ag_(6)Mo_(10)O_(33) mesowires for the sodium storage are investigated via cyclic voltammetry,electrochemical impedance spectroscopy and galvanostatic ***,these as-obtained Ag_(6)Mo_(10)O_(33) mesowires exhibit an outstanding initial capacity(1587.9 mAh·g^(-1)),a remarkable specific capacity for the second cycle(817.9 mAh·g^(-1)),and an excellent reversible capacity(551.5 mAh·g^(-1) after 30 cycles).The superior electrochemical properties of the nanoscaled silver molybdate are ascribed to the lower charge transfer resistance due to the microstructure of the smallest size Ag_(6)Mo_(10)O_(33) nanosheets that exhibit a thickness of around 5 nm,which can provide a great contact with the electrolyte,facilitating the rapid diffusion of sodium ions at the electrode/electrolyte interface and the rapid transport of sodium ions within the electrode ***,the proposed synthetic strategy and achieved deep insights will stimulate the development of Ag_(6)Mo_(10)O_(33) for high-safety and long-life sodium ion batteries.

关键词： sodium-ion batteries self-assembly-dissolution-recrystallization-Ostwald-ripening fabricating mechanism microwave irradiation fabrication Ag_(6)Mo_(10)O_(33)meso/nanowires energy storage and conversion

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Stepwise activated probe for cell surface glycan imaging

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Science China Chemistry 2025年

作者： Chunyi Zhang Jing Chen Xiaoyao Bai Shengnan Fu Xin Su State Key Laboratory of Organic-Inorganic Composites Beijing Key Laboratory of Bioprocess Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Life Science and Technology Beijing University of Chemical Technology

Fluorescent DNA probes commonly used for in situ imaging of cell surface glycans are “always-on” probes(AOPs), which produce high background noise and lack spatial specificity. Molecular dynamics simulations indicate that single-stranded DNA(ssDNA) can stably associate with the cell membrane, contributing to persistent background signals in AOPs. To overcome this challenge, a stepwise activated probe(SAP) is developed for in situ imaging of cell surface glycans. In SAP, the cell surface glycan is labeled by rolling circle amplification product through metabolic glycan labeling strategies. The product hybridizes a fluorophore and quencher-labeled ssDNA reporter to form a double strand producing primary enhancement of fluorescence signal. Nicking enzyme(***) cleaves the double strand and releases the quencher, further enhancing the signal. Nonspecific absorption of the reporter on the cellular membrane does not increase the fluorophore-quencher distance in SAP or trigger *** cleavage. As a result, only the glycan sites are illuminated. SAP not only exhibits high imaging specificity but also greatly simplifies the imaging procedure by reducing the washing steps. SAP offers a considerable improvement in detection specificity and sensitivity by employing a two-step activation and amplification process, making it a powerful method for in situ fluorescence imaging.

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Comparative Study of CCPS Based on Permanent Magnet and Electrically Excited HIA for Selecting Rational Topological Structure

CPSS Transactions on Power Electronics and Applications

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CPSS Transactions on Power Electronics and Applications 2025年第1期10卷 66-84页

作者： Longjian Liu Kexun Yu Xianfei Xie Zhijian Liu Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming China State Key Laboratory of Advanced Electromagnetic Technology Huazhong University of Science and Technology Wuhan China

In order to facilitate the selection of an optimal topological structure for rational pulsed capacitor charging power supplies (CCPS), this paper presents a comparative analysis of CCPS based on permanent magnet excited (PME) and electrically excited (EE) homopolar inductor alternators (HIA). The findings indicate that the d-axis transient inductance of the PME HIA is marginally greater than that of the EE HIA, a result that contradicts initial expectations. Notably, the PME HIA does not require consideration of transient flux variations, whereas the EE HIA does. The study establishes relationships among the enhancement of charge performance, efficiency, capacitance, frequency, and field winding (FW) resistance. It is observed that as capacitance, frequency, and FW resistance increase, there is a corresponding improvement in charge performance. The equipotential line representing the enhancement of charge performance approximates an inverse proportional function, suggesting that if the product of FW resistance and capacitance, or the product of FW resistance and frequency, remains constant, the improvement in charge performance will also be constant. Furthermore, it is noted that as capacitance and frequency increase, the improvement in efficiency diminishes, which is contrary to the trend observed in charge performance. To comprehensively evaluate the enhancement of charge performance and efficiency, a weighted function is proposed. This function aids in the selection of a rational topological structure for CCPS, distinguishing between those based on PME HIA and those based on EE HIA. Based on the results derived from the weighted improvement analysis, appropriate topological structures for CCPS can be identified according to varying capacitance, frequency, and FW resistance. Specifically, when the product of capacitance and FW resistance, or the product of frequency and FW resistance, is substantial, the PME HIA is recommended; conversely, the EE HIA is preferred

关键词： Transient analysis Resistance Capacitance Inductance Capacitors Power system measurements Density measurement Magnetic fields Windings Iron

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A novel active-passive protection strategy endows carbonyl iron with excellent intelligent anti-corrosion and microwave absorption dual functional characteristics

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Nano Research 2025年第1期18卷 487-500页

作者： Wei Tian Quanyuan Feng Linbo Zhang Yinfan Liu Xian Jian Longjiang Deng Institute of Microelectronics School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 611756China National Engineering Researching Centre of Electromagnetic Radiation Control Materials Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of EducationState Key Laboratory of Electronic Thin Films and Integrated DevicesSchool of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China The Yangtze Delta Region Institute(Huzhou)&School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaHuzhou 313001China

Carbonyl iron absorbers(CI)face significant challenges in practical applications,such as corrosion,interface bonding failure,detachment,and high maintenance ***,we have developed intelligent self-healing technology based on proactive/passive mechanisms via in situ synthesis of self-healing factors(polydopamine/benzotriazole(PDA/BTA))and physical barrier layers(SiO_(2)/1,1,1,3,3,3-hexamethyl disilazane,SiO_(2)/HMDS)to enhance corrosion resistance,while also being compatible with efficient microwave absorption *** unique multiscale structure gives full play to the utilization of the roles of each functional layer,including the intelligent self-healing features of PDA/BTA,physical shielding and spatial confinement characteristics of SiO_(2)/HMDS,and magnetic-dielectric synergistic mechanism resulted from the good impedance matching characteristics,the conduction loss,the interfacial polarization loss and natural *** asfabricated composites achieved an exceptional minimum reflection loss value of-55.4 dB at 10.7 GHz and the effective absorption band of 7.6 ***,it still exhibits obvious self-healing and corrosion resistance characteristics after 360 h corrosion treatment,ascribed to the self-healing mechanism of PDA/BTA and the blocking intervention effect of SiO_(2)/*** work is considered to pave the way for the synthesis of high-performance magnetic absorbers,especially in enhancing their intelligent self-healing ability in corrosive environments.

关键词： microwave absorption intelligent self-healing technology carbonyl iron multiscale structure magneticdielectric synergistic mechanism

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Multiple impacts of trace Tb addition on the secondary recrystallization andmagnetostriction of Fe–Ga thin sheet

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International Journal of Minerals,Metallurgy and Materials 2025年第4期32卷 902-914页

作者： Jiande Liu Zhenghua He Yuhui Sha Xiaofei Zhu Hongbo Hao Lijia Chen Liang Zuo School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Shenyang Key Laboratory of Advanced Structural Materials and Applications Shenyang University of TechnologyShenyang 110870China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

Fe–Ga sheets with large magnetostriction are required for improving the conversion efficiency under the ultra-high frequencymagnetic field. Trace Tb element doping can simultaneously improve the magnetostriction and ductility of Fe–Ga alloy. However, the im-pact of trace Tb doping on the microstructure and magnetostriction of Fe–Ga thin sheets is an open question. In this paper, the effects oftrace Tb addition on the secondary recrystallization and magnetostriction of Fe–Ga thin sheets are systematically studied by comparing thecharacteristics evolution of precipitation, texture, and nanoinclusions. The results indicate that trace Tb addition accelerates the secondaryrecrystallization of Goss texture due to the combined action of the bimodal size distributed precipitates, smaller grains, and more HEGBsin primary recrystallization. After quenching at 900℃, the magnetostriction value in 0.07 at %Tb-doped Fe_(81)Ga_(19) thin sheets increases by 30% to that of Fe_(81)Ga_(19) thin sheets. The increase in magnetostriction is attributed to the decrease in the number of Tb-rich precipitates andthe higher density of the nanometer-sized modified-D0_(3) inclusions induced by the dissolving of trace Tb elements after quenching. Theseresults demonstrate a simple and efficient approach for preparing Fe–Ga thin sheets with a large magnetostrictive coefficient by a combin-ation of trace RE element addition and conventional rolling method.

关键词： magnetostriction alloy thin sheets RE dopant secondary recrystallization precipitate phase nanoheterogeneity.

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Exploring the Magnetism of C_(5)/C_(2)B_(3) Heteroleptic Organolanthanide Sandwiches

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Chinese Journal of Chemistry 2025年第2期43卷 131-138页

作者： Ye-Ye Liu Qian-Cheng Luo Peng-Bo Jin Yan-Zhen Zheng Frontier Institute of Science and Technology(FIST) State Key Laboratory of Electrical Insulation and Power EquipmentMOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed MatterXi’an Key Laboratory of Electronic Devices and Material Chemistry and School of ChemistryXi’an Jiaotong UniversityXi’anShaanxi710054 China Department of Hepatobiliary Surgery and Institute of Advanced Surgical Technology and Engineering The First Affiliated Hospital of Xi’an Jiaotong UniversityXi’anShaanxi710061 China

Two families of cyclopentadienyl(Cp)/carboranyl heteroleptic sandwiched organolanthanide complexes,namely[Ln{η^(5):σ-Me_(2)C(C_(5)H_(4))(C_(2)B_(10)H_(10))}_(2)][Li(DME)_(3)](1Ln,Ln=Tb,Dy,Ho,Er)and[2-THF-2'-(μ^(2)-Cl)Li(THF)_"(3)-2,2'-Ln(nido-1,7-C_(2)B_(9)H_(11))Cp*](2Dy),were *** of 1Ln has been proposed based on the mixing-ligands idea by linking Cp and ***,the carborane cage of[Me_(2)C(C_(5)H_(4))(C_(2)B_(10)H_(10))]_(2)−deprotons and forms a mono-C−anion rather than deboron to form dicarborllide ***,the family of 1Ln features a dysprosocenium skeleton with extra two coordination of C−anions of *** coordination geometry is more like a tetrahedron if abstracting the centroids of two coordinated Cp *** this cubic-type geometry,no significant magnetic axiality is presented;only 1Dy and 1Tb show field-induced slow magnetic relaxation behavior below 10 *** by 1Ln,the free pentamethylcyclopentadienyl(Cp^(*−))and nido-dicarborllide ligands are used to sandwich central Dy3+ion,achieving heteroleptic complex *** bending angle by linking the centroid of Cp^(*−),Dy^(3+)and C_(2)B_(3)^(2−)in 2Dy is increased to 132.8(1)°.As such,the effective energy barrier for magnetic reversal(Ueff)and magnetic blocking temperature TB(ZFC)are both increased(Ueff=616(10)K;TB=6 K).The effort of further enhancing Ueff and TB in such heteroleptic organolanthanide sandwiches should rely on keeping increasing the ligand axiality.

关键词： Single-molecule magnets Heteroleptic sandwiched complexes nido-Dicarborllide Lanthanides Cyclopentadienyl

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