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Minor pre-tension and aging-induced fine dispersion of precipitates for strength-ductility coordination in Mg-Y-Nd alloys 认领 引用 被引量：2
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作者 Yanan Yu Luyi Han +3 位作者 Ximan Sun Xiangjian Zhu Dejin Wei Guangchun Wang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2026年第5期1614-1624,共11页
Increasing the number density of precipitates is a critical factor in enhancing the strength-ductility balance of metallic materials.This study investigates the precipitation behavior of dislocationinduced precipitate... Increasing the number density of precipitates is a critical factor in enhancing the strength-ductility balance of metallic materials.This study investigates the precipitation behavior of dislocationinduced precipitates and its impact on the strength-ductility coordination through minor pre-tension applied before aging.Statistical analysis of precipitate size reveals that pre-tension-induced dislocations provide additional nucleation sites,resulting in β′phase refinement and a more dispersed distribution,which effectively alleviates stress concentration.In contrast,non-pre-tensioned samples exhibit increased grain boundary precipitates and larger PFZs,leading to extensive intergranular fracture.The pre-tension treatment accelerates aging kinetics,significantly reducing prismatic dislocation density after aging.This reduction facilitates β1 phase nucleation and its linear arrangement along specific prismatic planes.This work systematically examined intra-granular precipitation strengthening induced by minor pre-tension,along with the interaction mechanisms between grain boundary precipitates and PFZs,providing crucial insights for developing high-performance magnesium alloys. 展开更多
关键词 Mg-Y-Nd-Zr-Gd alloy Pre-tension Aging treatment Precipitate Strength-ductility coordination Rare earths
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Tailoring the Coordination Environment of Single-Atom Catalysts for Enhanced Electrochemical CO2-to-CO Conversion Efficiency 认领 引用 被引量：1
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作者 Xiaoyan Zhang Rui Gao +4 位作者 Zhen Zhang Dezhang Ren Haibo Li Ming Feng Zhongwei Chen 《Carbon Energy》 SCIE EI CAS CSCD 2026年第3期68-75,共8页
Exploring the influence of the coordination environment of single-atom catalysts(SACs)on the electrochemical CO2reduction reaction is vital for assessing the reaction mechanism and structure-performance relationshi... Exploring the influence of the coordination environment of single-atom catalysts(SACs)on the electrochemical CO2reduction reaction is vital for assessing the reaction mechanism and structure-performance relationship.However,it is challenging to engineer the coordination configuration of isolated active metal atoms precisely.Herein,we strategically manipulate the coordination number of the Co-Nx configuration by simply changing the order of adding the metal precursor toward improved CO2electrolysis performance.Compared with the symmetric Co-N4coordination,the asymmetric Co-N3coordination leads to reinforced Co-N interaction and downshifted 3d orbital energy toward the Fermi level of the active Co sites,promoting the activation of CO2molecules and the formation of critical intermediate*COOH.The as-designed Co-N3SAC displays excellent Faradaic efficiency(FE)of 98.4%for CO2-to-CO conversion at a low potential of-0.80 V,together with decent FE over a wide potential range(-0.50 V to-1.10 V)and high durability.This study presents an ideal platform to manipulate the coordination number of atomically dispersed metal catalysts and provides a fundamental understanding of coordination configurationperformance correlation for CO2electroreduction. 展开更多
关键词 carbon dioxide reduction coordination number electrocatalysis single atom catalyst
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Perchlorate-type energetic coordination compounds:A new strategy for breaking the energy-sensitivity trade-off of energetic materials 认领 引用
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作者 Chao Zhang Tingwei Wang +5 位作者 Shaoqun Li Zujia Lu Cong Li Meiqi Xu Qiyao Yu Jianguo Zhang 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2026年第7期126-135,共10页
The field of energetic materials has long been constrained by a fundamental challenge known as the"energy-sensitivity trade-off".Although energetic coordination compounds(ECCs)offer a viable pathway to addre... The field of energetic materials has long been constrained by a fundamental challenge known as the"energy-sensitivity trade-off".Although energetic coordination compounds(ECCs)offer a viable pathway to address this dilemma,achieving high energy output,low sensitivity,and superior laser ignition performance within a single-component material remains a formidable challenge.This study introduces a novel"perchlorate-type ECCs"design strategy,which integrates additional oxidativeperchlorate anions(ClO4)into the coordination framework via hydrogen-bond-driven self-assembly to construct a unique dual structure of"perchlorate salt+coordination compound".Based on this approach,six novel Ag(I)/Cu(II)-based ECCs were successfully synthesized using 1H-pyrazole-4carbohydrazide ligands modified with electron-donating groups(methyl,amino,hydroxy).Singlecrystal structural analysis confirmed the successful realization of the target dual structure in[Ag(3APZ-CA)(ClO4)2]n,Ag(3-APZ-CA)2(ClO4)3,Cu(3-APZ-CA)2(ClO4)4.The design exhibits synergistic effects:(1)enhancing energy output by increasing oxygen balance,leading to higher detonation velocity(D>7.4 km/s)and detonation pressure(P>30.2 GPa);(2)reducing sensitivity,as protonated ligands----and extra ClO4-provide abundant hydrogen-bond donors and acceptors,forming an extended inter molecular interaction network that desensitizes the materials.Furthermore,the dual-structural ECCs exhibit ultralow ignition energy thresholds under 808 nm(e.g.,ECC-5 requires only 12 mJ)and achieve rapid deflagration-to-detonation transition(DDT),ensuring reliable initiation to RDX.This work not only develops a series of high-performance perchlorate-type ECCs but,more importantly,firstly provides a systematic strategy to overcome the energy-sensitivity trade-off. 展开更多
关键词 Energetic materials Energetic coordination compounds Dual structure Laser-ignitable
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Modulating coordination mode of Zn-ion in MOF protective layer to boost the reversibility of zinc anode for ultralong-life aqueous batteries 认领 引用
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作者 Xuanhe Hu Hujing Zhou +4 位作者 Weilin Shen Hongyuan Liang Jieying Hu Lai-Hon Chung Jun He 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第6期204-213,I0006,共10页
Aqueous Zn-ion batteries provide an alternative solution to grid energy storage,but their development has been hindered by dendrite formation and parasitic reactions on Zn anodes.Artificial protective layers hold grea... Aqueous Zn-ion batteries provide an alternative solution to grid energy storage,but their development has been hindered by dendrite formation and parasitic reactions on Zn anodes.Artificial protective layers hold great potential for alleviating these issues,in which the coordination between zincophilic sites and Zn2+plays a crucial role.However,the coordination mode,a key descriptor of interactions,is largely overlooked.Herein,we present a strategy to govern Zn2+diffusion and deposition behavior by changing its coordination mode in the metal–organic framework(MOF)protective layer by installing bidentate dihydroxyanthraquinone(AQOH)and monodentate anthraquinone(AQ)groups onto UiO-66 to afford UiOAQOH and UiO-AQ.Thanks to the superior chelating ability of the adjacent dual oxygen sites,the bidentate coordination is demonstrated to enable UiO-AQOH as a powerful ion-trapper to modulate Zn2+more effectively than UiO-AQ.Specifically,this coordination mode expedites the desolvation of hydrated Zn2+by kicking off more coordinated water than monodentate coordination,thereby suppressing waterinduced side reactions.Meanwhile,it contributes to improving Zn2+transport kinetics and guiding the diffusion of captured Zn2+along the target-distributed sites in nanochannels,ensuring a homogeneous Zn deposition.Notably,the assembled Zn||MnO2 full cell achieves an impressive ultra-long cycle life of10,000 cycles at 3 A g-1,surpassing most reported cases.This work provides new insights into designing advanced Zn anodes for high-performing aqueous batteries. 展开更多
关键词 Zinc anode Zinc-ion batteries MOF Artificial interphase Bidentate coordination
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Synthesis,characterization,and ion exchange properties of octamolybdate-based Cu(Ⅱ)coordination polymer 认领 引用
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作者 HAO Xiuli ZHANG Chenhao +3 位作者 FENG Chenkun HAN Haolin ZHAO Xudong SHI Guoliang 《无机化学学报》 SCIE CAS CSCD 北大核心 2026年第4期883-896,共14页
The ionothermal reaction between CuCl2,1,4-bis(1,2,4-triazol-1-ylmethyl)benzene(BBTZ),and(NH4)6Mo7O24 in 1-ethyl-3-methylimidazolium bromide((Emim)Br)led to a new octamolybdate-based coordination polyme... The ionothermal reaction between CuCl2,1,4-bis(1,2,4-triazol-1-ylmethyl)benzene(BBTZ),and(NH4)6Mo7O24 in 1-ethyl-3-methylimidazolium bromide((Emim)Br)led to a new octamolybdate-based coordination polymer(Emim)2[Cu(BBTZ)2(β-Mo8O26)](Mo8-CP).Mo8-CP was characterized by elemental analysis,thermogravime-try,IR,powder X-ray diffraction,and single-crystal X-ray diffraction.In Mo8-CP,structural analysis reveals that Cu coordinates with BBTZ ligands to form an interlocked 1D chain.These chains are further bridged by(β-Mo8O26)4-to construct a 3D coordination polymer.Notably,(Emim)+acts as a structure-directing agent,occupying the channels of the 3D coordination polymer.Based on this unique structure,the ion exchange properties of Mo8-CP toward rare-earth ions were investigated.It has been found that the luminescent color of the material can be successfully regulat-ed by introducing Eu3+or Tb3+through ion exchange.CCDC:2475110,Mo8-CP. 展开更多
关键词 octamolybdate coordination polymer ion exchange property fluorescent materials
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Construction of through-space charge transfer donor-acceptor coordination polymers through the combination of planar electron-deficient/rich ligands 认领 引用
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作者 Zhen-Wei Zhang Da-Shuai Zhang +10 位作者 Wei Wang Xiao-Ting Liu Hui Hu Yong-Zheng Zhang Longlong Geng Bin Li Yuchen Deng Rongmin Wei Xiuling Zhang Yuexing Zhang Ze Chang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期762-766,共5页
In this paper,a new series of donor-acceptor coordination polymers(DACPs),[Cd(dppz)(R-ndc)(H2O)]n(R=none,DZU-400;R=F,DZU-400-F;R=Br,DZU-400-Br;DZU is short for Dezhou University),[Cd(dppz)(adc)(H2O)]n(DZU-... In this paper,a new series of donor-acceptor coordination polymers(DACPs),[Cd(dppz)(R-ndc)(H2O)]n(R=none,DZU-400;R=F,DZU-400-F;R=Br,DZU-400-Br;DZU is short for Dezhou University),[Cd(dppz)(adc)(H2O)]n(DZU-401),and{[Cd(dppz)(adb)0.5(HCOO)(H2O)]}n(DZU-402),have been successfully constructed through the combination of electron-deficient dipyrido[3,2-a:2',3'-c]phenazine(dppz)as an acceptor and various dicarboxylic ligands(H2ndc=2,3-naphthalenedicarboxylic acid,F-H2ndc=6,7-difluorona phthalene-2,3-dicarboxylic acid,Br-H2ndc=6,7-dibromonaphthalene-2,3-dicarboxylic acid,H2adc=9,10-anthracenedicarboxylic acid,and H2adb=4,4'-(anthracene-9,10-diyl)dibenzoic acid)with electron-rich planar aromatic rings as donors.Structural analyses reveal closely parallel arrangement of the planar acceptor and donor units in these DACPs,which could facilitate the through-space charge transfer(TSCT)interactions of the D-A systems and the corresponding luminescent properties.Interestingly,the DACPs show highly regulable donor dependent photoluminescence from blue to orange.Based on the TSCT based luminescence and the high thermal stability of the DACPs,their thermal-stimuli responsive emission properties were further studied.Photoluminescence intensity of the DACPs all present good linearity with temperature(298-473K),as proved by variable temperature fluorescence spectra.Importantly,the temperature sensing process is reversible and recyclable,suggesting the promising applications of the DACPs as thermal-stimuli responsive materials. 展开更多
关键词 Donor-acceptor Coordination polymers Through-space charge transfer Tunable luminescence Temperature sensing
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Engineering asymmetric Ru-N3P1 coordination structures on P,N self-doped carbon for high-performance alkaline hydrogen evolution reaction 认领 引用
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作者 Shangyan Zhou Fei Liu +4 位作者 Qiandan Ren Huarui Wang Tongda Yang Jiamin Wang Xiaodan Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第7期828-835,I0020,共8页
Alkaline water electrolysis holds great promise for environmental remediation and sustainable energy conversion,yet its efficiency is hampered by the sluggish kinetics of the hydrogen evolution reaction(HER).Ru-based ... Alkaline water electrolysis holds great promise for environmental remediation and sustainable energy conversion,yet its efficiency is hampered by the sluggish kinetics of the hydrogen evolution reaction(HER).Ru-based single-atom catalysts(SACs),with atomically dispersed active sites,offer enhanced catalytic performance.However,the development of Ru SACs is hindered by aggregation at high loadings and an obscured structure-activity relationship.In this work,we engineer Ru SACs supported on P,N self-doped carbon(PNC)derived from mushroom substrate residue through precise regulation of Ru content.This catalyst achieves stable Ru dispersion at loadings up to 2 wt%,thereby forming well-defined RuN3P1coordination structures.Density functional theory calculations reveal that the asymmetric Ru-N3P1 coordination modulates the electronic structure of Ru single atoms,facilitating both kinetically favorable water dissociation and thermodynamically balanced hydrogen adsorption,leading to superior HER activity.The optimized RuSAs/PNC-2wt%catalyst delivers exceptional alkaline HER performance,achieving an overpotential as low as 38 m V at 10 mA cm-2 and remarkable stability maintained over 325 h,attributed to its high density of accessible active sites and facilitated electron transfer kinetics.This study provides an effective strategy for constructing high-loading SACs and establishes a quantitative structure-activity relationship,guiding the design of advanced electrocatalysts for sustainable energy conversion. 展开更多
关键词 Asymmetric coordination Ruthenium single-atom catalysts Biomass carbon Hydrogen evolution reaction
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Construction of effective and recyclable non-noble metal coordination polymers and their multiple applications in water 认领 引用
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作者 Jiahao Li Bin Pan +2 位作者 Anruo Mao Likui Wang Dawei Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期266-275,共10页
Acceptorless dehydrogenative coupling of pyridinemethanol with ketones is one of the most reliable methodologies to access functionalized 1,8-naphthyridine derivatives.However,it is challenging to develop environmenta... Acceptorless dehydrogenative coupling of pyridinemethanol with ketones is one of the most reliable methodologies to access functionalized 1,8-naphthyridine derivatives.However,it is challenging to develop environmentally friendly catalytic systems,especially in constructing efficient and recyclable catalysts under water or solvent-free conditions.Here,we designed two novel coordination polymers Cd-CPs and Fe-CPs to investigate their catalytic performance in water.Gratifyingly,it was observed that Cd-CPs as a multifunctional catalyst was successfully applied to establish a universal pathway for direct fabrication of 1,8-naphthyridine derivatives under water conditions,while it was effective for the synthesis of1,3,5-triazines through acceptorless dehydrogenative coupling strategies.The features of broad substrate,high atom efficiency,and good catalyst reusability highlight the feasibility of this transformation.In additional,we demonstrated the spindle-like structures Fe-P,derived from the Fe-CPs via phosphorylation,which can be used as an efficient electrocatalyst for oxygen evolution reaction with good stability.This work provides two highly efficient non-noble metal catalysts for functionalized 1,8-naphthyridine derivatives production and oxygen evolution reaction,and opens a new avenue to further fabricate diverse metal catalysts with high catalytic performance in water. 展开更多
关键词 Acceptorless dehydrogenative coupling 1,8-Naphthyridine derivatives Coordination polymers Non-noble metal catalyst
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Competitive coordination chemistry in hybrid cation solvation structures for advanced sodium metal batteries 认领 引用
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作者 Lei Zhang Lianli Wang +5 位作者 Yan Lei Yaxin Kong Yifan Ma Shuliang Luo Yan Yuan Hai Lu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第5期765-773,I0018,共9页
Undesirable solvent-derived side reactions and poor Na+transport kinetics at the Na anode/electrolyte interface greatly restrict the practicality of sodium metal batteries.Herein,an optimization strategy of propyle... Undesirable solvent-derived side reactions and poor Na+transport kinetics at the Na anode/electrolyte interface greatly restrict the practicality of sodium metal batteries.Herein,an optimization strategy of propylene carbonate(PC)-based electrolyte is proposed by introducing cyclopentyl methyl ether(CPME)as a quasi-diluent and a hetero-salt additive.Theoretical calculations and experimental research together elucidate the complicated interactions among various components and reveal the latent competitive coordination mechanisms in the electrolyte.Firstly,the weakly-coordinated CPME weakens Na+-PC interaction and pushes PF6-entry into Na+solvation sheath.Secondly,Li salt addition builds an exceptional Na/Li-coexisting solvation environment,where Li+competes with Na+in coordination with solvent molecules and anions.Thirdly,strong Li+-TFSI-interaction impels the great majority of TFSI-into Li+solvation sheath by replacing a part of P.The synergistic effects of the above multiple competition behaviors in the hybrid cation solvation structure not only facilitate the Na+desolvation process but also generate favorable Na/Li-hybridized,hybrid anions-dominated interfaces,thereby endowing the Na3V2(PO4)3(NVP)/Na cell with stable operation over 4000 cycles at a high rate of 20 C. 展开更多
关键词 Sodium metal battery Solvation structure Competition coordination Hybridized interface Lithium salt additive
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Fixed-Time Zeroing Neural Dynamics for Adaptive Coordination of Multi-Agent Systems 认领 引用
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作者 Cheng Hua Xinwei Cao +1 位作者 Jianfeng Li Shuai Li 《CAAI Transactions on Intelligence Technology》 SCIE EI CSCD 2026年第1期267-278,共12页
This paper presents an adaptive multi-agent coordination(AMAC)strategy suitable for complex scenarios,which only requires information exchange between neighbouring robots.Unlike traditional multi-agent coordination me... This paper presents an adaptive multi-agent coordination(AMAC)strategy suitable for complex scenarios,which only requires information exchange between neighbouring robots.Unlike traditional multi-agent coordination methods that are solved by neural dynamics,the proposed strategy displays greater flexibility,adaptability and scalability.Furthermore,the proposed AMAC strategy is reconstructed as a time-varying complex-valued matrix equation.By introducing a dynamic error function,a fixed-time convergent zeroing neural network(FTCZNN)model is designed for the online solution of the AMAC strategy,with its convergence time upper bound derived theoretically.Finally,the effectiveness and applicability of the coordination control method are demonstrated by numerical simulations and physical experiments.Numerical results indicate that this method can reduce the formation error to the order of 10-6within 1.8 s. 展开更多
关键词 fixed-time convergence multi-agent coordination robotics zeroing neural dynamics
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Impact of altruistic preference on the dynamic decision and coordination of joint emission reduction in low-carbon supply chain 认领 引用
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作者 Jinchai Lin Chunyan Zheng +3 位作者 Ruguo Fan Yuanyuan Wang Yingqing Zhang Han Song 《Chinese Physics B》 SCIE EI CAS CSCD 2026年第4期343-362,共20页
Under the carbon trading mechanism,this study establishes a decision-making model for a low-carbon supply chain comprising a single manufacturer and a retailer.It analyzes the impact of the retailer's altruistic p... Under the carbon trading mechanism,this study establishes a decision-making model for a low-carbon supply chain comprising a single manufacturer and a retailer.It analyzes the impact of the retailer's altruistic preferences on decision variables,profits,supply chain coordination,and the complexity of the dynamic decision-making model.The study indicates that the continuous increase in the adjustment parameters of decision variables can destabilize the supply chain system,with the adjustment parameter for wholesale price having a greater impact than the adjustment parameter for carbon emission reduction level.An increase in altruistic preferences reduces the stability region of the supply chain system,yet its influence on supply chain profits varies depending on the system's state.When the system is stable,altruistic preferences have a positive impact on overall profits;when the system is unstable,profits first increase and then decrease.Compared to decentralized decision-making,centralized decision-making yields higher profits.Based on this,we innovatively design a side-payment self-enforcing contract mechanism to effectively coordinate the supply chain and promote more efficient cooperation.After implementing this contract,the increase in retailers'altruistic preferences can expand the stability region of the supply chain system,and the impact of the carbon emission reduction level adjustment parameter on system stability is greater than that of the wholesale price adjustment parameter,which is different from the situation before the contract was implemented. 展开更多
关键词 low-carbon supply chain altruistic preference carbon cap-and-trade mechanism bifurcation and chaos coordination mechanism
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An Optimal Right-Turn Coordination System for Connected and Automated Vehicles at Urban Intersections 认领 引用
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作者 Mahmudul Hasan Shuji Doman +2 位作者 A.S.M.Bakibillah Md Abdus Samad Kamal Kou Yamada 《Computers, Materials & Continua》 SCIE EI 2026年第1期430-446,共17页
Traffic at urban intersections frequently encounters unexpected obstructions,resulting in congestion due to uncooperative and priority-based driving behavior.This paper presents an optimal right-turn coordination syst... Traffic at urban intersections frequently encounters unexpected obstructions,resulting in congestion due to uncooperative and priority-based driving behavior.This paper presents an optimal right-turn coordination system for Connected and Automated Vehicles(CAVs)at single-lane intersections,particularly in the context of left-hand side driving on roads.The goal is to facilitate smooth right turns for certain vehicles without creating bottlenecks.We consider that all approaching vehicles share relevant information through vehicular communications.The Intersection Coordination Unit(ICU)processes this information and communicates the optimal crossing or turning times to the vehicles.The primary objective of this coordination is to minimize overall traffic delays,which also helps improve the fuel consumption of vehicles.By considering information from upcoming vehicles at the intersection,the coordination system solves an optimization problem to determine the best timing for executing right turns,ultimately minimizing the total delay for all vehicles.The proposed coordination system is evaluated at a typical urban intersection,and its performance is compared to traditional traffic systems.Numerical simulation results indicate that the proposed coordination system significantly enhances the average traffic speed and fuel consumption compared to the traditional traffic system in various scenarios. 展开更多
关键词 Right-turn coordination connected and automated vehicles vehicular communication edge processing urban intersection
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Interfacial coordination engineering of CuCOF/CNTs hybrids for selective electrocatalytic CO2reduction 认领 引用
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作者 Jing-Zhou Wang Xiao-Hui Liu +6 位作者 Guo-Sheng Wang Hai-Yang Yu Wen-Yue Lin Shuo-Yun Zheng Hui-Lin Li Can Xue Xian-Tai Zhou 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第4期437-446,I0011,共10页
The rational design of efficient electrocatalysts for the CO2reduction reaction(CO2RR)requires precise control over active-site accessibility and electronic structure.Covalent organic frameworks(COFs)provide tun... The rational design of efficient electrocatalysts for the CO2reduction reaction(CO2RR)requires precise control over active-site accessibility and electronic structure.Covalent organic frameworks(COFs)provide tunable coordination environments,yet the effect of their anchoring modes on conductive supports remains underexplored.Herein,we investigate CuCOF integrated with carbon nanotubes(CNTs)through three coordination strategies:physical mixing,porphyrin-based linkage,and pyridine coordination.The pyridine-linked CuCOF/CNTs demonstrated superior performance,achieving a faradaic efficiency(FE)of 53.2%for ethanol at-1.1 V vs.RHE with a current density of-24.4 mA/cm2in an H-type cell,and maintained stable operation for over 50 h.In a flow-cell configuration,ethanol selectivity was further enhanced,with a FE of 53.6%and a current density of-86.1 mA/cm2.In situ spectroscopic analyses combined with density functional theory(DFT)calculations revealed that pyridine coordination enhanced interfacial charge transfer,increased the electron density of Cu centers,and lowered the energy barrier for C-C coupling.These findings highlight the critical role of coordination modes at the COF-support interface in steering reaction pathways and provide insights for constructing efficient CO2RR catalysts. 展开更多
关键词 CuCOF Anchoring strategies CO2reduction reaction Interfacial electronic modulation Pyridine coordination
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Syntheses and fluorescent sensing properties of two coordination polymers based on 9,9′‑dihexyl‑2,7‑di(pyridin‑4‑yl)fluorene 认领 引用
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作者 WANG Gaofeng SUN Shuwen +1 位作者 Meng Lixin PENG Dequn 《无机化学学报》 SCIE CAS CSCD 北大核心 2026年第2期331-339,共9页
Under solvothermal conditions,1,4‑naphthalenedicarboxylic acid(H2ndc)and 9,9′‑dihexyl‑2,7‑di(pyridin‑4‑yl)fluorene(hfdp)reacted with Co2+ions and Cd2+ions to form two coordination polymers,[Co(hfdp)(ndc)(H2O... Under solvothermal conditions,1,4‑naphthalenedicarboxylic acid(H2ndc)and 9,9′‑dihexyl‑2,7‑di(pyridin‑4‑yl)fluorene(hfdp)reacted with Co2+ions and Cd2+ions to form two coordination polymers,[Co(hfdp)(ndc)(H2O)]·DMA}n(1)and{[Cd(hfdp)(ndc)(H2O)]·DMA}n(2),respectively(DMA=N,N‑dimethylacetamide).Single‑crystal X‑ray diffraction analyses showed that both complexes 1 and 2 contain similar structures.Topological analysis indicates that complexes 1 and 2 have a{44·62}planar structure.In addition,both complexes reveal good thermal stability and fluorescence sensing performance.They exhibited good sensitivity and selectivity towards 2,4,6‑trinitrophenol(TNP)by fluorescent quenching.The limits of detection of 1 and 2 for TNP were 0.107 and 0.327μmol·L-1,respectively.CCDC:2475515,1;2475516,2. 展开更多
关键词 coordination polymers cadmium(Ⅱ) topology fluorescence fluorene
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Electronegativity-oriented coordination regulation of main-group metal single-atom catalysts for oxygen reduction to H2O2:A combined study of first-principles and machine learning 认领 引用
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作者 Hao Chen Haiyuan Liao +3 位作者 Qi Zhou Yang Liu Guojun Liu Yuan Yao 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第3期684-688,共5页
Electrochemical two-electron oxygen reduction reaction(2e-ORR)is a green and attractive method for hydrogen peroxide synthesis.However,rapid and efficient development of high-performance catalyst remains a great ch... Electrochemical two-electron oxygen reduction reaction(2e-ORR)is a green and attractive method for hydrogen peroxide synthesis.However,rapid and efficient development of high-performance catalyst remains a great challenge.Different from traditional trial and error methods,this study employs density functional theory and machine learning method to efficiently screen the promising main-group metal single-atom catalysts(SACs)and systematically investigate the influence of electronegativity of coordination atoms on the adsorption behavior of key intermediates in ORR process.It is found that the K SAC with N/B in the first coordination sphere and Sn SAC with N/C in the first coordination sphere and O in the second coordination sphere exhibit both excellent 2e-ORR activity and selectivity by showing extremely low overpotentials of 0.029 V and 0.064 V,respectively,as well as barrier-free processes from*OOH to H2O2.Bagging displays prominent advantages among seven popular algorithms because of its ensemble strategy.This provides a low-cost approach for designing and screening electrocatalyst candidates,and it will be informative for experimental study in the future to accelerate the development of catalysts for oxygen reduction and other types of reactions. 展开更多
关键词 Density functional theory Machine learning Main-group metal single-atom catalyst Two-electron oxygen reduction reaction Electronegativity Coordination environment
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Research on the Coupling and Coordination of Urbanization and Ecological Resilience in the Districts of Quanzhou City, China 认领 引用
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作者 ZHANG Min XUE Chengzhi +1 位作者 ZHU Siyu CHEN Jiai 《Journal of Geodesy and Geoinformation Science》 CSCD 2026年第1期100-120,共21页
Under the increasingly tight constraints of resources and environment,achieving the coordinated advancement of urbanization and ecological protection has become a core issue for regional sustainable development in the... Under the increasingly tight constraints of resources and environment,achieving the coordinated advancement of urbanization and ecological protection has become a core issue for regional sustainable development in the new era.This study develops a dual-dimensional urbanization evaluation system incorporating both population and economic indicators,and integrates a comprehensive ecological resilience assessment framework based on size,density,and morphology to analyze the spatiotemporal evolution and coordination between urbanization and ecological resilience in Quanzhou’s districts from 2018 to 2022.The results reveal a distinct spatial pattern in which urbanization levels are lower in central areas and higher in peripheral regions.Licheng District demonstrates the highest urbanization level with an average value of 0.78,while Luojiang District remains at the lowest level,constrained by economic development factors.Regarding ecological resilience,Luojiang District exhibits a highlevel model of“high size resilience-medium density resilience-high morphology resilience.”In contrast,Fengze District exhibits the poorest resilience with a significant 29.74%decline over the five years.The coordination analysis reveals a spatial configuration characterized by imbalance in central districts and better coordination in peripheral areas.Licheng District achieves optimal coordination through enhanced density resilience.Quangang District maintains basic coordination despite a 7.47%decline,which is influenced by energy-intensive industries.Both Luojiang and Fengze Districts experience severe coordination imbalances,with Luojiang constrained by urbanization delays and Fengze suffering from poor performance across all three resilience dimensions under intensive development pressure.The study reveals the intrinsic mechanism underlying the coordinated development of urbanization and ecological resilience.The findings provide a scientific basis for formulating differentiated development strategies in economically developed coastal areas,offering significant reference value for promoting high-quality regional development and ecological civilization construction. 展开更多
关键词 districts of Quanzhou City urbanization ecological resilience coupling and coordination
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Synthesis and crystal structures of Co(Ⅱ)/Cu(Ⅱ)coordination polymers based on solvent and ligand concentration regulation strategy 认领 引用
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作者 SUN Yinxia LIU Liping +7 位作者 BAI Xue SUN Yu SUN Wanhong DENG Zhepeng CHEN Jianghai WANG Jianjun XU Li ZHANG Shuzhen 《无机化学学报》 SCIE CAS CSCD 北大核心 2026年第2期340-354,共15页
Four distinct coordination polymers(CPs)were successfully synthesized by altering solvent types and adjusting ligand concentrations,and their crystal structures were investigated.[Co(L)(FDCA)(H2O)2]·0.5H_(2... Four distinct coordination polymers(CPs)were successfully synthesized by altering solvent types and adjusting ligand concentrations,and their crystal structures were investigated.[Co(L)(FDCA)(H2O)2]·0.5H2O(1)was synthesized as a 2D structure using Coas the metal source,methanol‑water(4∶6,V/V)as the solvent,and specific concentrations of 2,5‑furandicarboxylic acid(H2FDCA)and 1,3,5‑triimidazole benzene(L).Adjusting to pure water and lowering the concentration of L yielded the 1D chain structure of[Co(HL)2(H2O)2](FDCA)2·6H2O(2).Using Cu(Ⅱ)as the metal source,methanol/water(9∶1,V/V)as the solvent,and specific concentrations of L and H2FDCA,the 1D chain structure of[Cu(L)(FDCA)(H2O)]·2H2O(3)was synthesized.Upon increasing the concentrations of L and H2FDCA,and switching the solvent to pure water,the 1D chain structure of[Cu(HL)2(H2O)2](FDCA)2·6H2O(4)was obtained.This shows that changing the solvent and ligand concentrations can affect the structural changes of CPs.In addition,the solid‑state photoluminescence of CPs 1‑4 at room temperature was studied,and their morphological changes were observed via scanning electron microscopy.Density functional theory calculations revealed that the negative charge concentrates on the O and N atoms of the ligand,facilitating ligand‑metal ion coordination.CCDC:2403934,1;2403935,2;2403936,3;2403938,4. 展开更多
关键词 Co(Ⅱ)/Cu(Ⅱ)coordination polymer crystal structure solvent system ligand concentration regulation strategy
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Spatio-temporal pattern and driving mechanism of the coupling coordination of human settlements systems 认领 引用
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作者 LI Xueming DU Meishuo +2 位作者 FENG Linlin TIAN Shenzhen YANG Jun 《Journal of Geographical Sciences》 SCIE CSCD 2026年第3期621-643,共23页
The development of human settlements(HS)in coastal cities is an integral component and a vital pathway toward building a strong marine power.It is also an essential requirement for achieving the coordinated developmen... The development of human settlements(HS)in coastal cities is an integral component and a vital pathway toward building a strong marine power.It is also an essential requirement for achieving the coordinated development of HS systems in these cities.In this study,we constructed an indicator system to analyze the coupling coordination degree(CCD)of HS systems in coastal cities in the Bohai Rim region of China(CCBRR).This study is based on five systems and employs methods such as the entropy weight method,CCD model,spatial trend surface analysis,and geographic detector to examine comprehensively the spatial and temporal patterns of CCD in 17 CCBRR during the period 2011–2022,as well as to explore their influencing factors.The findings are as follows:(1)Temporally,the CCD is high and exhibits a slow increasing trend,with distinct stage characteristics.(2)Spatially,the distribution of CCD reveals a“one core,many strengths”structural pattern.(3)Moreover,socioeconomic factors are the dominant force driving the CCD of the internal HS systems in the CCBRR.(4)Finally,we constructed a coupling coordination driving mechanism for HS in the CCBRR with the aim of providing scientific references and path choices for the high-quality and coordinated development of the CCBRR along with the implementation of the new quality productive forces regionalization. 展开更多
关键词 Bohai Rim region coastal cities human settlements system coordination spatial differences one core,many strengths driving mechanism
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Research on benefit coordination mechanism in renewable energy multi-energy complementary systems 认领 引用
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作者 Yanyue Wang Chongru Liu 《Global Energy Interconnection》 EI CSCD 2026年第3期544-554,共11页
Cooperation among multiple stakeholders in the complementary integration of renewable energy sources(hydro,wind,and solar power)can enhance the incremental benefits of each participant as well as the overall efficienc... Cooperation among multiple stakeholders in the complementary integration of renewable energy sources(hydro,wind,and solar power)can enhance the incremental benefits of each participant as well as the overall efficiency of the cooperative alliance.The interest coordination mechanism stands as a pivotal element in the development of such multi-energy complementary systems.This study adopts a three-tier hierarchical model comprising a primary layer,secondary layer,and tertiary layer.The primary layer is an efficiency-oriented cooperative game model based on collective rationality,which determines the installed capacities of hydro,wind,and solar power within the alliance by requiring that the incremental financial internal rate of return(FIRR)exceed the benchmark FIRR for joining the hydro-wind-solar integrated alliance.The secondary layer is a participation-oriented non-cooperative game model rooted in individual rationality.Building on the installed capacities defined by the primary layer,it calculates the FIRR for each energy type when developed independently and compares it with the incremental FIRR of alliance participation to assess the willingness of stakeholders to join the alliance.The tertiary layer is an equity-oriented bargaining game model.Leveraging the incremental FIRR from the primary layer and the individually rational FIRR from the secondary layer,it ascertains the equitable FIRR for each stakeholder through bargaining based on the principle of fairness.A case study of a specific renewable energy multi-energy complementary system validates the feasibility and effectiveness of the proposed mechanism. 展开更多
关键词 Hydro-wind-solar Multi-energy complementarity Benefit coordination mechanism Cooperative game Non-cooperative game Bargaining game Primary-secondary-tertiary Hierarchical decision-making
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A Novel Distributed Controller Design for Robust Global Coordination of MASs With Heterogeneous Saturation 认领 引用
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作者 Xiaoling Wang Shengnan Zhu 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2026年第1期230-232,共3页
Dear Editor,This letter addresses the challenge of achieving robust global coordination in multi-agent systems(MASs)subject to heterogeneous actuator saturation and additive input disturbances.We develop a novel distr... Dear Editor,This letter addresses the challenge of achieving robust global coordination in multi-agent systems(MASs)subject to heterogeneous actuator saturation and additive input disturbances.We develop a novel distributed control framework that strategically integrates a redesigned saturation function to handle the nonlinear actuator constraint and a high-gain feedback mechanism for effective disturbance rejection. 展开更多
关键词 robust global coordination disturbance rejection nonlinear actuator constraint distributed control multi agent systems actuator saturation distributed control framework heterogeneous actuator saturation
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