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Construction of N-doped copper metal-organic frameworks for promoting photocatalytic carbon dioxide reduction to ethylene

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Science China Chemistry 2025年第2期68卷 601-609页

作者： Fan Guo Zong-Zheng He Peng Wang Xiao-Yu Zhang Hongjian Yu Qin-Chao Wang Wei-Yin Sun School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China Coordination Chemistry Institute State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China

Engineering nonmetallic atom-doped metal-organic framework(MOF)catalyst to promote C−C coupling and realize conversion of CO_(2) into C_(2 )multi-carbon hydrocarbon products is still ***,with 2-methylimidazole as a dopant of N element,an N-doped NH_(2)-CuBDC catalyst was obtained via a facile and simple stirring *** illumination,compared with catalytic CO_(2) reduction to C1 product of CO by original MOF,N-doped NH_(2)-CuBDC can motivate generation of C_(2)H_(4),which is difficult to achieve in photocatalytic system by MOF-based *** transfer rates of photo-generated charges have been expedited due to the high electron density around Cu catalytic sites after *** importantly,C–C coupling intermediate CO–CHO*was identified by in situ Fourier transform infrared spectroscopy during the catalytic CO_(2) reduction reaction process,which further indicates the presence of Cu–N sites in the NH_(2)-CuBDC can facilitate the formation of C2H_(4) *** work uncovers a new paradigm to design photocatalysts for enhancing the reduction of CO_(2) to C_(2) products.

关键词： metal-organic frameworks C-C coupling doping photocatalytic CO_(2) reduction Cu-based catalysts

Phase saddle point transformation-enabled mode-adaptive detection of acoustic orbital angular momentum with high efficiency and low crosstalk

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Science China(Physics,Mechanics & Astronomy) 2025年

作者： Kai Wu Yang Tan Jingjing Liu Bin Liang Jianchun Cheng collaborative innovation Center of advanced microstructures and Key Laboratory of Modern Acoustics MOE Institute of AcousticsDepartment of Physics Nanjing University

Acoustic orbital angular momentum (OAM) provides an infinite set of orthogonal bases in Hilbert space and significantly boosts the link capacity and data transmission rate. High-capacity and low-crosstalk OAM detection within compact physical space is highly desired to effectively harness this spatial dimension of sound wave, but the existing mechanisms generally either operate only for finite OAMs with predetermined mode orders or rely on complicated active devices. Here, we propose a phase saddle point (PSP) transformation mechanism for distinguishing and demultiplexing acoustic OAM modes in a passive, mode-adaptive,high-efficiency, and high-accuracy paradigm. The phase mask characterized by a PSP in the specific area is created through the single-pass log-polar transformation without prior information of incident modes, whose interaction with incident vortex beams of different OAM modes will yield the translation of the stationary phase point and thereby generate the corresponding focused line spots at distinct lateral positions. We theoretically elucidate the mode-adaptive response of PSP transformation by deriving the quantitative relationship between the OAM order and line spot offset. This mode adaptability enables our mechanism to detect OAM of arbitrary mode orders and mode numbers with the inter-mode crosstalk being effectively suppressed, beyond attainable with the existing methods. The effectiveness of our proposed mechanism is validated by demonstrating several distinct examples of single-mode OAM sorting and multi-mode synthesized vortex beam demultiplexing. We anticipate this modeadaptive methodology, designed for compact dimensions and featuring with low crosstalk and uniform efficiency, will find important applications in OAM information processing.

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Robust free-base and metalated corrole radicals with reduction-induced emission

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Chinese Chemical Letters 2025年第2期36卷 426-431页

作者： Pengfei Li Chulin Qu Fan Wu Hu Gao Chengyan Zhao Yue Zhao Zhen Shen State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced MicrostructuresSchool of Chemistry and Chemical EngineeringNanjing University School of Chemistry and Materials Science Nanjing Normal University College of Materials Science and Engineering Nanjing Forestry University

Preparing free-base porphyrinoid radicals that can function as coordination ligands is a challenging task. Here we report the synthesis of a stable, free-base benzocorrole(BC) radical containing only two inner NH protons via a retro-Diels-Alder conversion. The radical character of BC was fully supported by crystallographic analysis, spectroscopic evidence, and theoretical calculations. This neutral radical ligand allowed easy insertion of Zn(Ⅱ), Ga(Ⅲ), and Pd(Ⅱ) ions to produce radical complexes. All these radicals exhibited luminescence-on responses under weak reducing atmosphere, corresponding to the conversion to their aromatic anions. The red fluorescence was observed for BC and its Zn(Ⅱ) and Ga(Ⅲ) complexes,and the near-infrared phosphorescence(>900 nm) was detected for Pd(Ⅱ) complex at room ***, Ga(Ⅲ) corrole exhibited a variation in fluorescence in response to axial coordination. Our findings provide a promising radical platform for coordination and developing novel functional materials with switchable spin and emission.

关键词： Luminescence Macrocyclic ligands Porphyrinoids Radicals Redox chemistry

Overcoming bandwidth limitations in space-coiled acoustic metamaterials through inclined perforated plate design

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Chinese Physics B 2025年第1期34卷 374-379页

作者： Jixin Liu Fengmin Wu Ting Li Junjun Wang Xinye Zou Dong Zhang Department of Applied Physics School of ScienceHarbin University of Science and TechnologyHarbin 150080China Key Laboratory of Modern Acoustics(MOE) Department of PhysicsCollaborative Innovation Center of Advanced MicrostructureNanjing UniversityNanjing 210093China Laboratory of Solid State microstructures Nanjing UniversityNanjing 210093China

Traditional space-coiled acoustic metamaterials have been widely used in the fields of low-frequency sound absorption and noise ***,they have limitations in terms of low-frequency absorption bandwidth,and the weak coupling effect under complex coiled structures also limits their *** this work,we introduce the composite structure changing the characteristic impedance of acoustic metamaterials to enhance the coupling ***,the perforated plates with inclined design instead of traditional partitions greatly improve the sound *** model and method designed in this paper show significant innovation in enhancing low-frequency absorption performance.

关键词： metamaterials composite structure over-damped modes coupling sound absorption

Andreev reflection in superconducting state of pressurized La3Ni2O7

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Science China(Physics,Mechanics & Astronomy) 2025年第04期Mechanics & Astronomy) .卷 184-192页

作者： Cong Liu Mengwu Huo Huan Yang Qing Li Yingjie Zhang Zhening Xiang Meng Wang Hai-Hu Wen National Laboratory of Solid State microstructures and Department of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices School of Physics Sun Yat-sen University

The discovery of superconductivity with Tcabove 77 K in pressurized La3Ni2O7has stimulated enormous interest in the field of unconventional superconductivity.A recent experiment in La2Pr Ni2O7has shown that the superconducting volume is close to100%.Because the superconductivity can only be achieved under high pressures,many intrinsic properties,such as the superconducting gaps,have not been measured *** report the Andreev reflection measurement of pressurized La3Ni2O7with the onset superconducting transition temperature at about 77 *** data reveal a clear peak of differential conductivity near zero bias in the tunneling spectrum;and appear also are some temperature-dependent steps that may reflect other superconducting *** based on the Blonder-Tinkham-Klapwijk model with multiple components can roughly fit the data,and the central peak can be fitted with a d-wave gap with a magnitude of about 9 meV,and other two s-wave gaps at about 16 and 26 *** latter two large gaps are determined from the enhanced steps of the differential conductivity,which may have other *** results reveal possible evidence of a sign-reversal gap and multi-component features of the superconducting gaps in the nickelate 327 systems.

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Pressure induced superconducting dome in LaNiGa_(2)

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Science China(Physics,Mechanics & Astronomy) 2025年第2期68卷 161-166页

作者： Yanan Zhang Dajun Su Zhaoyang Shan Yunshu Shi Rui Li Jinyu Wu Zihan Yang Kaixin Ye Fei Zhang Yanchun Li Xiaodong Li Chao Cao Valentin Taufour Lin Jiao Michael Smidman Huiqiu Yuan Center for Correlated Matter and School of Physics Zhejiang UniversityHangzhou 310058China Department of Physics and Astronomy University of CaliforniaDavis 95616USA Beijing Synchrotron Radiation Facility Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Silicon and advanced Semiconductor Materials Zhejiang UniversityHangzhou 310058China collaborative innovation Center of advanced microstructures Nanjing 210093China

LaNiGa_(2)is a time-reversal symmetry breaking superconductor with symmetry protected band crossings,making it an ideal platform for investigating the interplay between unconventional superconductivity and electronic structure *** we present a transport study of LaNiGa_(2)under *** application of pressure to LaNiGa_(2)induces a significant enhancement of the superconducting transition temperature Tcat a pressure of 7 *** contrast,powder X-ray diffraction(XRD)results show no evidence of structural phase transitions up to 26.3 ***,the ratio of band diffusivity shows a sudden increase at around 7 GPa,suggesting possible pressure-induced changes in the electronic structure that are closely linked to the evolution of superconductivity.

关键词： high pressure superconductivity time-reversal breaking

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Potential dependence in electrocatalysis:a theoretical perspective

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Science China Chemistry 2025年第1期68卷 21-25页

作者： Leyu Liu Zhaoming Xia Zeyu Wang Yinjuan Chen Hai Xiao Department of Chemistry Tsinghua UniversityBeijing 100084China Fundamental Science Center of Rare Earths Ganjiang Innovation AcademyChinese Academy of SciencesGanzhou 341119China Key Laboratory of advanced Catalytic Materials and Technology Advanced Catalysis and Green Manufacturing Collaborative Innovation CenterChangzhou UniversityChangzhou 213164China

Electrocatalysis is a key technology for the new energy era and sustainable development,serving as the interface for interconversion of electrical and chemical energies,which spans a wide spectrum of applications in sustainable energy and environmental *** reactions including electrochemical CO_(2)reduction reaction(eCO_(2)RR),hydrogen evolution reaction(HER),and oxygen evolution/reduction reactions(OER/ORR),hold essential promise for renewable energy technologies as well as complement the biogeochemical carbon and oxygen cycles.

关键词： spectrum interface Electrocatalysis

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Phase transformation of two-dimensional nanomaterials: state-of-the-art progress in designing strategies and catalytic applications

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Science China Materials 2025年第1期68卷 65-85页

作者： Zeqi Wu Feng Niu Da Chen Yuexiang Huang Guigao Liu Yong Zhou Wenguang Tu Xi Zhu Zhigang Zou College of Materials and Chemistry China Jiliang UniversityHangzhou 310018China School of Science and Engineering The Chinese University of Hong Kong(Shenzhen)Shenzhen 518172China National Special Superfine Powder Engineering Research Center School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China Jiangsu Key Laboratory for Nano Technology National Laboratory of Solid State MicrostructuresCollaborative Innovation Center of Advanced MicrostructuresSchool of PhysicsNanjing UniversityNanjing 210093China

Phase transformation of two-dimensional(2D)nanomaterials can lead to significant changes in electronic and optical properties,which enables the development of novel *** strategies for phase engineering of 2D nanomaterials have drawn considerable attention in recent *** review focuses on the state-of-the-art progress in the phase transformation of 2D nanomaterials and their catalytic ***,the basic concepts of phase transformation and the outstanding electronic and optical properties induced by phase transformation are briefly ***,different strategies for achieving phase transformation are discussed in detail and classified into several types based on their characteristics,including(i)doping,(ii)external fields,(iii)optical irradiation,(iv)strain effect,(v)high-energy particle excitation,and(vi)thermal *** applications of 2D nanomaterials in catalysis based on phase transformation have also been ***,a summary of the technical challenges to phase control in 2D nanomaterials and potential opportunities for developing novel applications is presented.

关键词： phase transformation two-dimensional nanomaterials strategy catalysis application

Manipulating optical and electronic properties through interfacial ferroelectricity

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Chinese Physics B 2025年第1期34卷 2-12页

作者： Yulu Liu Gan Liu Xiaoxiang Xi National Laboratory of Solid State microstructures and Department of Physics Nanjing UniversityNanjing 210093China collaborative innovation Center of advanced microstructures Nanjing UniversityNanjing 210093China Jiangsu Physical Science Research Center Nanjing 210093China

Interfacial ferroelectricity is a recently established mechanism for generating spontaneous reversible electric polarization,arising from the charge transfer between stacked van der Waals layered atomic *** has been realized in both naturally formed multilayer crystals and moiré*** to the large number of material choices and combinations,this approach is highly versatile,greatly expanding the scope of ultrathin ferroelectrics.A key advantage of interfacial ferroelectricity is its potential to couple with preexisting properties of the constituent layers,enabling their electrical manipulation through ferroelectric switching and paving the way for advanced device *** review article summarizes recent experimental progress in interfacial ferroelectricity,with an emphasis on its coupling with a variety of electronic *** introducing the underlying mechanism of interfacial ferroelectricity and the range of material systems discovered to date,we highlight selected examples showcasing ferroelectric control of excitonic optical properties,Berry curvature effects,and *** also discuss the challenges and opportunities that await further studies in this field.

关键词： interfacial ferroelectricity sliding ferroelectricity moir´e ferroelectricity

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