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Recent progress on photoactive nonprecious transition-metal complexes

Science China Chemistry 2025年第1期68卷 46-95页

作者： Zhong-Liang Gong Hong-Jie Zhang Yan Cheng Jianxun Liu Yuhan Ai Yaqin Li Zhihui Feng Qiong Zhang Shaolong Gong Yong Chen Chang-Jiang Yao Yuan-Yuan Zhu Liang-Jin Xu Yu-Wu Zhong CAS Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing 100190China State Key Laboratory of Structural Cemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China School of Chemistry and Chemical Engineering Anhui Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009China State Key Laboratory of Explosion Science and Safety Protection School of Mechatronical EngineeringBeijing Institute of TechnologyBeijing 100081China College of Chemistry and Molecular Sciences Hubei Key Lab on Organic and Polymeric Optoelectronic MaterialsWuhan UniversityWuhan 430072China School of Chemistry and Chemical Engineering Anhui UniversityHefei 230601China Key Laboratory of Photochemical Conversion and Optoelectronic Materials&CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Photoactive complexes of nonprecious transition metals,mainly including those in the first-row and partially the second-row of the Periodic table of elements,have received increasing attention in view of their low cost and long-term *** are recognized as promising alternatives to noble transition metal complex congeners that have been extensively studied in optoelectronic devices,artificial photosynthesis,photocatalysis,biodiagnostics,and therapeutics,*** review is devoted to a comprehensive summary on the classical and recent advances on photoactive nonprecious transition metal complexes,including photoactive Zr,V,Cr,Mo,and W complexes,Mn complexes and hybrids,Fe,Co,Ni,and Cu complexes,and Zn and Cd complexes and hybrids.A particular focus is given on the molecular design,modulation of photophysical and photochemical properties,and applications of the representative and lately-developed nonprecious metal *** addition,a perspective on the future development in this field is provided at the end of this review.

关键词： photoactive metal complexes earth-abundant metals nonprecious metal complexes luminescence photochemistry

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Lunar regolith simulant-derived 3D-printed geopolymers with optimized mechanical and thermal management properties

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Composites Part A: Applied Science and Manufacturing 2025年 196卷

作者： Sun, Yifan Ma, Siqi Chen, Qingze Chen, Guoliang He, Peigang Wang, Yaming Qiu, Jun Jia, Dechang School of Energy Science and Engineering Key Laboratory of Aerospace Thermophysics Harbin Institute of Technology Harbin150001 China State Key Laboratory of Robotics and System Harbin Institute of Technology Harbin150001 China Institute for Advanced Ceramics Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology Harbin Institute of Technology Harbin150080 China Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510460 China

Lunar soil, as an in-situ resource, holds significant potential for constructing bases and habitats on the Moon. However, such constructions face challenges including limited mechanical strength and extreme temperature fluctuations ranging from −170 °C to +133 °C between lunar day and night. In this study, we developed a 3D-printed geopolymer derived from lunar regolith simulant with an optimized zig-zag structure, exhibiting exceptional mechanical performance and thermal stability. The designed structure achieved remarkable damage tolerance, with a compressive strength exceeding 12.6 MPa at ∼ 80 vol% porosity and a fracture strain of 3.8 %. Finite element method (FEM) simulations revealed that the triangular frame and wavy interlayers enhanced both stiffness and toughness. Additionally, by incorporating strategically placed holes and extending the thermal diffusion path, we significantly improved the thermal insulation of the structure, achieving an ultralow thermal conductivity of 0.24 W/(m K). Furthermore, an iron-free geopolymer coating reduced overheating under sunlight by 51.5 °C, underscoring the material's potential for space applications. © 2025 Elsevier Ltd

关键词： Compressive strength

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Brazing of high entropy ceramic to Nb using a CoFeCrNiCu high-entropy alloy filler: Interfacial microstructure and mechanism

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Journal of Materials Research and technology 2025年 36卷 9198-9207页

作者： Jialing Cheng Gang Wang Wei Wang Yu Zhao Rujie He Caiwang Tan Anhui Key Laboratory of High-performance Non-Ferrous Metal Materials Anhui Polytechnic University Wuhu 241000 China Key Laboratory of Additive Manufacturing (3D Printing) of Anhui Province Wuhu 241000 China School of Materials Science and Engineering Anhui University of Technology Maanshan 243002 China Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin 150001 China

Effective metallurgical bonding between the (HfZrTiTaNb)C high-entropy carbide ceramic and Nb was successfully established using CoFeCrNiCu as the filler material. The microstructure of the joint consists of (HfZrTiTaNb)C/FCC, Laves, Cu(s, s), NbC, and Nb(s, s)/Nb. The brazing mechanism of the joint was primarily contributed by the diffusion of Nb and C, leading to the formation of Laves and FCC phases at the joint center, and the development of NbC and Nb(s, s) diffusion zones on the Nb side. The composite microstructure of the joint, consisting of the soft FCC phase, hard Laves phase, and NbC, significantly enhances the joint strength. The maximum shear strength of the joint reached 61 MPa under the conditions of 1240 °C for 10 min. Additionally, the effects of brazing temperature and holding time on the microstructure and shear strength was discussed.

关键词： Brazing High entropy alloy High-entropy carbide ceramic Shear strength

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Two isomorphic Cd/Mn(II) MOFs based on V-shaped carboxylic acid ligands-synthesis and application in fluorescence detection of Fe3+, nitroaromatic explosives and sulfonamide antibiotics

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Journal of Solid State Chemistry 2025年 348卷

作者： Jia, Xinxin Zhang, Wenzhuo Zhang, Shi-Tong Luo, Xiaolong School of Chemistry and Life Science Advanced Institute of Materials Science Changchun University of Technology Changchun130012 China State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun130012 China

Luminescent metal-organic frameworks (LMOFs) demonstrate promising applications in the field of fluorescence sensing. In this study, two isomorphic MOFs, [Cd4 (MTPTC)2 (DMF)4]·5DMF·2H2O (Compound 1) and [Mn2 (MTPTC) (DMF)2]·DMF (Compound 2) were constructed using Cd(NO3)2·4H2O and Mn(CH3COO)2·4H2O as metal sources with 5,5’-(5-Methylbenzene-1,3-diyl) diisophthalic acid (H4MTPTC). Topological analysis reveals that both Compounds 1 and 2 possess novel 3,3,4-c connected topologies with vertex symbols [6.82][62.83.10][62.8]. It is considered that the d10 Cd(II)-based MOF shows a better response in the field of nitroaromatic explosive sensing compared with the d5 Mn-based MOF, which may possess lower electron density on the conjugated building blocks. Fluorescence sensing experiments for metal cations, nitroaromatic explosives (NAEs), and sulfonamide antibiotics (SAs) show that Compound 1 exhibits excellent detection capabilities and recyclability for Fe3+, 4-nitrophenol (4-NP), and sulfadiazine (SDZ). The Ksv values (quenching constant) of Compound 1 for Fe3+, 4-NP, and SDZ are 1.30 × 105 M−1, 4.10 × 105 M−1, and 1.36 × 105 M−1. Compound 1 prove to be ideal fluorescence sensing materials for the detection of metal cations, NAEs, and SAs. © 2025

关键词： Cadmium compounds

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Wireless transmission of internal hazard signals in Li-ion batteries

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Nature 2025年第8063期641卷 639-645页

作者： Fan, Jinbao Liu, Chenchen Li, Na Yang, Le Yang, Xiao-Guang Dou, Bowen Hou, Shujuan Feng, Xuning Jiang, Hanqing Li, Hong Song, Wei-Li Sun, Lei Chen, Hao-Sen Gao, Huajian Fang, Daining Institute of Advanced Structure Technology Beijing Institute of Technology Beijing China State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing China National Engineering Research Center of Electric Vehicles School of Mechanical Engineering Beijing Institute of Technology Beijing China School of Information and Electronics Beijing Institute of Technology Beijing China School of Vehicle and Mobility Tsinghua University Beijing China School of Engineering Westlake University Hangzhou China Institute of Physics Chinese Academy of Sciences Beijing China School of Integrated Circuits and Electronics Beijing Institute of Technology Beijing China Mechano-X Institute Applied Mechanics Laboratory Department of Engineering Mechanics Tsinghua University Beijing China

High-capacity lithium-ion batteries (LIBs) play a critical role as power sources across diverse applications, including portable electronics, electric vehicles (EVs) and renewable-energy-storage systems¹. However, there is growing concern about the safety of integrated LIB systems, with reports of up to 9,486 incidents between 2020 and 2024 (ref. ²). To ensure the safe application of commercial LIBs, it is essential to capture internal signals that enable early failure diagnosis and warning. Monitoring non-uniform temperature and strain distributions within the jelly-roll structures of the battery provides a promising approach to achieving this goal^3,4. Here we propose a miniaturized and low-power-consumption system capable of accurate sensing and wireless transmission of internal temperature and strain signals inside LIBs, with negligible influence on its performance. The acquisition of internal temperature signals and the area ratio between initial internal-short-circuited regions and battery electrodes enables quantitative analysis of thermal fusing and thermal runaway phenomena, leading to the evaluation of the intensity of battery thermal runaway and recognition of thermal abuse behaviours. This work provides a foundation for designing next-generation smart LIBs with safety warning and failure positioning capabilities. © The Author(s), under exclusive licence to Springer Nature Limited 2025.

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Insights into structure-Activity Relationships between Y Zeolites and their n-C_(10)Hydrocracking Performances via Machine Learning Approaches

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Chinese Journal of Catalysis 2025年第4期71卷 187-196页

作者： Qianli Ma Hong Nie Ping Yang Jianqiang Liu Hongyi Gao Wei Wang Songtao Dong SINOPEC Research Institute of Petroleum Processing Co. Ltd.Beijing100083China Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China

Hydrocracking technology represents a crucial position in the conversion of heavy oil and the transformation development from oil refining to the chemical *** properties of catalysts are one of the key factors in the hydrocracking *** the main acidic component of hydrocracking catalyst,the influence of zeolite properties on the reaction performance has been the focus of *** this study,a series of NiMo/Al_(2)O_(3)-Y catalysts were prepared using different Y zeolites as acidic components,and their performances in the hydrocracking of n-C_(10)were also *** structure-activity relationship between Y zeolite and the cracking performance of n-C_(10)was investigated with machine ***,a database of the physical and chemical properties of Y zeolite and their performance was established,and the correlation analysis was also *** such as the cell constant,acid content,acid strength,B/L ratio,mesopore volume,micropore volume of Y zeolite,and the reaction temperature were selected as independent *** conversion of n-C_(10)and the ratios of products C_(3)/C_(7)and i-C_(4)/n-C_(4)were selected as dependent variables.A model was established by the random forest algorithm and a new zeolite was predicted based on *** results of model prediction were in good agreement with the experimental *** R^(2)of the n-C_(10)conversion,C_(3)/C_(7)ratio,and i-C_(4)/n-C_(4)ratio were 0.9866,0.9845,and 0.9922,and the minimum root mean square error values were 0.0163,0.101,and 0.0211,*** results can provide reference for the development of high performance hydrocracking catalyst and technology.

关键词： Hydrocracking Machine learning Y zeolite n-Decane Acid Pore structure

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Achieving a large field-induced polarization and energy density in BaTiO_(3)films sputter-deposited on Si at 200℃ via a buffer-layer technique

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Journal of advanced Ceramics 2025年第3期14卷 69-78页

作者： Chao Liu Jun Ouyang Yuyao Zhao Hanfei Zhu Hongbu Cheng Zhenyan Liang Li Wang Institute of Advanced Energy Materials and Chemistry Jinan Engineering Laboratory for Multi-scale Functional MaterialsShandong Provincial Key Laboratory of Molecular EngineeringSchool of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)Jinan 250353China Key Laboratory of Key Film Materials&Application for Equipments(Hunan Province) Hunan Provincial Key Laboratory of Thin Film Materials and DevicesSchool of Material Sciences and EngineeringXiangtan UniversityXiangtan 411105China Key Laboratory for Liquid–Solid Structure Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China

Ferroelectric oxide films with a large field-induced polarization can be used in dielectric capacitors for charge or energy storage in microelectronic systems and hence have attracted intense research interest.A high processing temperature is usually required to produce a well-crystallized polar phase and hence a large polarization in the film,corresponding to a high charge or energy ***,high processing temperature not only reduces the charge‒discharge efficiency by producing a sizable remnant polarization but is also incompatible with the integration *** this study,we address this problem by creating a large field-induced polarization(~55.8μC/cm^(2))in BaTiO_(3)films sputter-deposited on Si at 200℃ via a buffer-layer *** large polarization led to a high energy density and efficiency(Wrec≈94.7 J/cm^(3),η≈78.2%@4 MV/cm).The thickness of LaNiO_(3)buffer layer was revealed to be the key factor determining the electric polarization(remnant and field-induced ones).A 50 nm LaNiO_(3)thickness,corresponding to the aforementioned polarization and energy storage performance,not only ensures proper crystallization in the BaTiO_(3)film,but also leads to an optimal combination of polycrystalline grains with a high dielectric *** latter accounts for the majority of the field-induced *** results revealed the key role of a buffer layer in tuning the microstructure of a low-temperature deposited ferroelectric oxide ***,the excellent charge/energy storage performance of these 200℃-deposited BaTiO_(3)films has provided many opportunities for this simple dielectric in microelectronics.

关键词： ferroelectric oxide films field-induced polarization BaTiO_(3) LaNiO3 energy density

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Crack propagation behavior in metal matrix composites: A coupled nonlocal crystal plasticity and phase field modelling

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Journal of the Mechanics and Physics of Solids 2025年 200卷

作者： Xiong, Yukai Zhao, Jianfeng Zeng, Qinglei Yuan, Fuping Zhang, Xu Sichuan Province Key Laboratory of Advanced Structural Materials Mechanical Behavior and Service Safety School of Mechanics and Aerospace Engineering Southwest Jiaotong University Chengdu611756 China School of Materials Science and Engineering Southwest Jiaotong University Chengdu610031 China Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China

The aluminum matrix composite is known for its lightweight and high strength, while its application is limited in various fields due to its low fracture strain. Configuring reinforcements in metal matrix composites (MMCs) is effective in improving the strength-ductility synergy of metallic materials;however, the underlying mechanisms have yet to be elucidated, and an optimizing strategy is to be explored. This study developed a coupled crystal plasticity (CP) and phase field (PF) model to investigate the toughening mechanisms of MMCs. The CP module incorporates a dislocation flux-based nonlocal model, while the PF module considers the influence of geometrically necessary dislocations (GNDs) on crack initiation and propagation. This coupled model effectively captures the initiation of cracks near the interface due to the accumulation of GNDs at the grain boundary and particle surface. Systematic simulations comprehensively reveal the effects of particle distribution and particle strength on the fracture strain. The findings suggest that arranging particles near grain boundaries improves ductility when particle damage is ignored. However, experimental observations reveal that particles undergo damage during deformation. Only when particle damage is incorporated, does the model accurately reflect the enhanced ductility in scenarios where particles are distributed within the grain interior aligning better with experimental findings. This research enhances our understanding of the damage mechanisms in MMCs and provides valuable insights into their microstructural design. © 2025 Elsevier Ltd

关键词： Metallic matrix composites

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A digital twin framework for turbine blade crack propagation prediction

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International Journal of Mechanical Sciences 2025年 297-298卷

作者： Tian, Xuanxin Li, Shiyu Zhang, Heng Li, Qiubo Ai, Shigang Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China

Digital Twin offers a novel methodology for structural health monitoring (SHM) across various fields. This paper proposes an integrated digital twin framework that combines monitoring and simulation for SHM and life prediction of critical structural components. The framework incorporates the Mask R-CNN network to extract damage-related features from structural response field images and employs the dynamic Bayesian network (DBN) coupled with parametric modeling for real-time model updating. A custom-developed visualization platform enables real-time representation of digital twin model. As a case study, the proposed framework is applied to turbine blades crack propagation, involving physical experiments, automated crack detection, digital model updating, and crack propagation life prediction. The results show that the framework achieves accurate crack identification, with a maximum inversion error of 10.5 %, and reliable life prediction, with a final error of 7.15 %. This study offers an efficient and practical approach for SHM and life prediction, offering significant potential for intelligent structural monitoring and predictive maintenance in engineering applications. © 2025

关键词： Crack propagation Digital twin Mask R-CNN Strain field Structural health monitoring Turbine blade

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A modified single edge V-notched beam method for evaluating surface fracture toughness of thermal barrier coatings

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Applied Mathematics and Mechanics(English Edition) 2023年第5期44卷 693-710页

作者： Haoran BAI Zhanyu WANG Sangyu LUO Zhaoliang QU Daining FANG Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China

The surface fracture toughness is an important mechanical parameter for studying the failure behavior of air plasma sprayed(APS)thermal barrier coatings(TBCs).As APS TBCs are typical multilayer porous ceramic materials,the direct applications of the traditional single edge notched beam(SENB)method that ignores those typical structural characters may cause *** measure the surface fracture toughness more accurately,the effects of multilayer and porous characters on the fracture toughness of APS TBCs should be *** this paper,a modified single edge V-notched beam(MSEVNB)method with typical structural characters is *** to the finite element analysis(FEA),the geometry factor of the multilayer structure is *** to the narrower V-notches,a more accurate critical fracture stress is *** on the Griffith energy balance,the reduction of the crack surface caused by micro-defects is *** MSEVNB method can measure the surface fracture toughness more accurately than the SENB method.

关键词： thermal barrier coating(TBC) surface fracture toughness modified single edge V-notched beam(MSEVNB)method multilayer structure micro-defect

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