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Homogenous Microporous Thin Films Assembled Using Discrete Metal–Organic Polyhedra 认领 引用
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作者 Soyeon Ko UnJin Ryu +4 位作者 Ho Yeon Yoo Jeeyoung Shin Kyung Min Choi Dong Gyu Park Won Ho Choi 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2025年第1期336-342,共7页
Homogeneous films with tailored microporous structures are crucial for several applications;however,fabricating such films presents significant challenges.This is primarily because most microporous materials have crys... Homogeneous films with tailored microporous structures are crucial for several applications;however,fabricating such films presents significant challenges.This is primarily because most microporous materials have crystal sizes in the nanoand micrometer ranges,which inevitably generates intergranular spaces in the films,thereby complicating the fabrication of these thin films.In this study,functionalized metal–organic polyhedra(MOPs)are used as discrete microporous units and assembled into homogenous microporous films.The generation of intergranular spaces is avoided while controlling packing parameters and film thicknesses.Initially,the MOP units,influenced by van der Waals forces between carbon chains of functionalized adipic acids,display an affinity to form spindle-shaped blocks and islands.As the MOP concentration increases,these structures self-assembled into a hexagonally packed structure with an in-plane orientation and a maximum stacking of two layers of MOPs.By contrast,un-functionalized MOPs form a disordered film structure owing to random agglomeration.Evidently,functionalized adipic acid influences the orientation of the MOP network films with uniformly distributed micropores,effectively preventing the formation of intergranular spaces.Additionally,formaldehyde adsorption and desorption experiments revealed that the MOP network films possess superior adsorption and desorption capacities.The proposed approach signifies a breakthrough in the fabrication of homogenous microporous films. 展开更多
关键词 formaldehyde capture metal-organic frameworks(MOFs) metal-organic polyhedra(MOP) microporous films self-assembly
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Carbon polyhedra encapsulated Si derived from Co-Mo bimetal MOFs as anode materials for lithium-ion batteries 认领 引用 被引量：2
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作者 Huan Ruan Lifeng Zhang +3 位作者 Shuai Li Kai Wang Wenhuan Huang Shouwu Guo 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第28期91-98,共8页
Silicon(Si)holds promise as an anode material for lithium-ion batteries(LIBs)as it is widely avail-able and characterized by high specific capacity and suitable working potential.However,the relatively low electrical ... Silicon(Si)holds promise as an anode material for lithium-ion batteries(LIBs)as it is widely avail-able and characterized by high specific capacity and suitable working potential.However,the relatively low electrical conductivity of Si and the significantly high extent of volume expansion realized dur-ing lithiation hinder its practical application.We prepared N-doped carbon polyhedral micro cage en-capsulated Si nanoparticles derived from Co-Mo bimetal metal-organic framework(MOFs)(denoted as Si/CoMo@NCP)and explored their lithium storage performance as anode materials to address these prob-lems.The Si/CoMo@NCP anode exhibited a high reversible lithium storage capacity(1013 mAh g−1at 0.5 A g−1after 100 cycles),stable cycle performance(745 mAh g−1at 1 A g−1after 400 cycles),and excellent rate performance(723 mAh g−1at 2 A g−1).Also,the constructed the full-cell NCM 811//Si/CoMo@NCP exhibited well reversible capacity.The excellent electrochemical performances of Si/CoMo@NCP were at-tributed to two unique properties.The encapsulation of NCP with doped nitrogen and porous structural carbon improves the electrical conductivity and cycling stability of the molecules.The introductions of metallic cobalt and its oxides help to improve the rate capability and lithiation capacity of the materials following multi-electron reaction mechanisms. 展开更多
关键词 Si anode Carbon polyhedra Cobalt/molybdenum double doping Lithium-ion batteries Electrochemical property
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Immobilization of foreign protein into polyhedra of Bombyx mori nucleopolyhedrovirus(BmNPV) 认领 引用 被引量：1
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作者 Xing-wei XIANG Rui YANG +4 位作者 Lin CHEN Xiao-long HU Shao-fang YU Cui-ping CAO Xiao-feng WU 《Journal of Zhejiang University-SCIENCE B》 SCIE CAS CSCD 2012年第2期111-117,共7页
In the late phase of Bombyx mori nucleopolyhedrovirus(BmNPV)infection,a large amount of polyhedra appear in the infected cell nucleolus,these polyhedra being dense protein crystals protecting the incorporated virions ... In the late phase of Bombyx mori nucleopolyhedrovirus(BmNPV)infection,a large amount of polyhedra appear in the infected cell nucleolus,these polyhedra being dense protein crystals protecting the incorporated virions from the harsh environment.To investigate whether the foreign protein could be immobilized into the polyhedra of BmNPV,two recombinant baculoviruses were generated by a novel BmNPV polyhedrin-plus(polh +)Bac-to-Bac system,designated as vBmBac(polh +)-enhanced green fluorescent protein(EGFP)and vBmBac(polh +)-LacZ,which can express the polyhedrin and foreign protein simultaneously.Light microscopy analysis showed that all viruses produced polyhedra of normal appearance.Green fluorescence can be apparently detected on the surface of the vBmBac(polh +)-EGFP polyhedra,but not the BmNPV polyhedra.Fluorescence analysis and anti-desiccation testing confirmed that EGFP was embedded in the polyhedra.As expected,the vBmBac(polh +)-LacZ polyhedra contained an amount of LacZ and had a higherβ-galactosidase activity.Sodium dodecyl sulfate polyacrylamide gel electrophoresis(SDS-PAGE)and Western blotting were also performed to verify if the foreign proteins were immobilized into polyhedra.This study provides a new inspiration for efficient preservation of useful proteins and development of new pesticides with toxic proteins. 展开更多
关键词 Bombyx mori nucleopolyhedrovirus Polyhedra Foreign protein Protein immobilization
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Sulfonate-Functionalized Polyoxovanadate-Based Metal-Organic Polyhedra for Enhanced Proton Conduction via the Synergy of Linker and Metal Cluster Vertex 认领 引用 被引量：2
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作者 Yu Zhang Shan-Shan Liu +6 位作者 Bo Li Hanqi You Longxi Zhang Zhenyi Zhang Hong-Ying Zang Qi Zheng Weimin Xuan 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2022年第8期12-17,共6页
Metal-organic polyhedra(MOPs)have emerged as novel porous platforms for proton conduction,however,the concerted employment of both linker and metal cluster vertex is rarely applied for the fabrication of MOPs-based hi... Metal-organic polyhedra(MOPs)have emerged as novel porous platforms for proton conduction,however,the concerted employment of both linker and metal cluster vertex is rarely applied for the fabrication of MOPs-based high conducting materials.Herein we report the synthesis of sulfonate-functionalized polyoxovanadate-based MOPs for enhanced proton conduction via the synergistic effect from linker and metal cluster node.MOPs 1 and 2 exhibit octahedral cage configuration constructed from{V5O9Cl}vertex and 5-sulfoisophthalate linker.Owing to the ordered packing of octahedral cages along three axes,3D interpenetrated open channels that are lined with high-density sulfonates are thus formed within 2.Coupled with the proton-conductive{V5O9Cl}vertexs as well as protonated counterions,an extensive H-bonded network is therefore generated for facile proton transfer.2 exhibits high proton conductivity of 3.02×10-2S cm-1at 65℃under 90%RH,recording the highest value for MOPs pellet sample.This value is enhanced~1order of magnitude compared with that of carboxylate-functionalized analogue 3,clearly illustrating the advantage of combining linker and metal cluster node for enhanced proton conduction.This work will further promote the exploitation of high proton conductive MOPs-based materials by the synergy design strategy. 展开更多
关键词 metal-organic polyhedra proton conduction polyoxovanadate synergistic effect
Polyhedral symmetry and quantum mechanics 认领 引用
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作者 G. S. Anagnostatos 《Natural Science》 2014年第4期198-210,共13页
A thorough study of regular and quasi-regular polyhedra shows that the symmetries of these polyhedra identically describe the quantization of orbital angular momentum, of spin, and of total angular momentum, a fact wh... A thorough study of regular and quasi-regular polyhedra shows that the symmetries of these polyhedra identically describe the quantization of orbital angular momentum, of spin, and of total angular momentum, a fact which permits one to assign quantum states at the vertices of these polyhedra assumed as the average particle positions. Furthermore, if the particles are fermions, their wave function is anti-symmetric and its maxima are identically the same as those of repulsive particles, e.g., on a sphere like the spherical shape of closed shells, which implies equilibrium of these particles having average positions at the aforementioned maxima. Such equilibria on a sphere are solely satisfied at the vertices of regular and quasi-regular polyhedra which can be associated with the most probable forms of shells both in Nuclear Physics and in Atomic Cluster Physics when the constituent atoms possess half integer spins. If the average sizes of the constituent particles are known, then the average sizes of the resulting shells become known as well. This association of Symmetry with Quantum Mechanics leads to many applications and excellent results. 展开更多
关键词 Symmetry Polyhedral Symmetry Angular Momentum and Polyhedra Nuclear Structure and Symmetry Isomorphic Shell Model Shell Clustering in Nuclei Binding Energies Radii
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Notes on Quantitative Structure-Properties Relationships (QSPR) Part Four: Quantum Multimolecular Polyhedra, Collective Vectors, Quantum Similarity, and Quantum QSPR Fundamental Equation 认领 引用
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作者 Ramon Carbo-Dorca Silvia Gonzalez 《Management Studies》 2016年第1期33-47,共15页
The nature and origin of a fundamental quantum QSPR （QQSPR） equation are discussed. In principle, as any molecular structure can be associated to quantum mechanical density functions （DF）, a molecular set can be r... The nature and origin of a fundamental quantum QSPR （QQSPR） equation are discussed. In principle, as any molecular structure can be associated to quantum mechanical density functions （DF）, a molecular set can be reconstructed as a quantum multimolecular polyhedron （QMP）, whose vertices are formed by each molecular DF. According to QQSPR theory, complicated kinds of molecular properties, like biological activity or toxicity, of molecular sets can be calculated via the quantum expectation value of an approximate Hermitian operator, which can be evaluated with the geometrical information contained in the attached QMP via quantum similarity matrices. Practical ways of solving the QQSPR problem from the point of view of QMP geometrical structure are provided. Such a development results into a powerful algorithm, which can be implemented within molecular design as an alternative to the current classical QSPR procedures. 展开更多
关键词 quantum similarity quantum multimolecular polyhedra （QMP） quantum QSPR （QQSPR） QQSPR fundamental equation QMP statistical-like collective functions QMP condensed collective indices classical QSPR-QSAR
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Ionic radius-dependent self-assembly of lanthanide organic polyhedra:structural diversities and luminescent properties 认领 引用
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作者 Jing Su Fan Yin +4 位作者 Xiao-Fang Duan Jing-Yao Zhou Li-Peng Zhou Chong-Bin Tian Qing-Fu Sun 《Inorganic Chemistry Frontiers》 SCIE EI CAS CSCD 2025年第8期3073-3082,共10页
The synthesis of nonclassical polyhedra is at the forefront of supramolecular research because of their unique anisotropic interior cavities.However,due to the difficulty in controlling the topology of Ln supramolecul... The synthesis of nonclassical polyhedra is at the forefront of supramolecular research because of their unique anisotropic interior cavities.However,due to the difficulty in controlling the topology of Ln supramolecular systems,the preparation of nonclassical lanthanide organic polyhedrals(LOPs)remains a challenge.Herein,we explore the ionic radius-dependent self-assembly of LOPs using a rectangular tetratropic ligand L.Owing to the rectangular geometry of the ligand panels(rather than square),its assembly with lanthanide ions located in the middle of the Ln series afforded an irregular tetragonal antiprismatic Ln8L4(Ln=Sm3+,Eu3+,Tb3+,Dy3+and Ho3+)with two faces unoccupied with L ligands.Interestingly,this tetragonal antiprism possessed an oblate internal cavity that binds to four THF molecules in the solidstate structure.With an increase in radius,the larger La3+and Nd3+ions produced Ln4L2 with a distinct sandwich square architecture.In contrast,the smaller Er3+and Lu3+ions gave rise to a mixture of both Ln8L4 and Ln6L3.On adding excess Ln3+ions,a structural transformation from Ln8L4 to Ln6L3 occurred.Structural comparisons of La4L2 and Sm8L4 revealed that the differences in architecture within these systems were governed by both the ionic radii of the lanthanides and conformational flexibility of the ligands.Photophysical investigations revealed that the ligand L exhibited a sensitizing ability toward Sm3+,Tb3+and Dy3+ions,displaying their characteristic luminescence emission,with a new record-setting luminescent quantum yield of 92.74%observed for Tb8L4.This work provides new insights into the effect of lanthanide size on the resulting assemblies and opens new avenues to develop nonclassical LOPs. 展开更多
关键词 ionic radius supramolecular research ln supramolecular systemsthe synthesis nonclassical polyhedra lanthanide organic polyhedra anisotropic interior cavitieshoweverdue self assembly structural diversity
Hierarchical Porous Metal-Organic Polyhedra for Efficient Oxidative Cleavage of β-O-4 Bonds in Lignin Model Compound 认领 引用
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作者 Xinchen Kang Lili Li +17 位作者 Hengan Wang Tian Luo Shaojun Xu Yinlin Chen Joseph H.Carter Zi Wang Alena M.Sheveleva Kai Lyu Xue Han Floriana Tuna Eric J.L.McInnes Chiu C.Tang Lifei Liu Buxing Han Emma K.Gibson C.Richard A.Catlow Sihai Yang Martin Schröder 《CCS Chemistry》 CSCD 2025年第4期1016-1026,共11页
Catalytic cleavage ofβ-O-4 linkages is an essential but challenging step in the depolymerization of lignin.Here,we report the templated electrosynthesis of a hydrophobic metal-organic polyhedral catalyst(Cu-MOP-e),wh... Catalytic cleavage ofβ-O-4 linkages is an essential but challenging step in the depolymerization of lignin.Here,we report the templated electrosynthesis of a hydrophobic metal-organic polyhedral catalyst(Cu-MOP-e),which exhibits excellent hydrothermal stability and exceptional activity for this reaction.The oxidative cleavage of 2-phenoxyacetophenone,1,a lignin model compound,over Cu-MOP-e at 90℃for 1 h affords full conversion with yields of the monomer products phenol and benzoic acid of 99%.The reusability of Cu-MOP-e was confirmed by carrying out ten cycles of reaction.The mechanism of catalyst-substrate binding was investigated by highresolution synchrotron X-ray powder diffraction,in situ X-ray absorption spectroscopy,electron paramagnetic resonance spectroscopy,and density functional theory(DFT)calculations.The combination of optimal porosity and active Cu(Ⅱ)sites provides confined binding of 2-phenoxyacetophenone,thus promoting the cleavage ofβ-O-4 linkage under relatively mild conditions. 展开更多
关键词 metal-organic polyhedra porous structure defects host-guest interactions cleavage ofβ-O-4 linkages
Stereospecific assembly of enantiopure Archimedean polyhedra 认领 引用
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作者 He Tian 《Science China Chemistry》 SCIE EI CAS CSCD 2025年第6期2197-2198,共2页
Archimedean solids were first proposed by the ancient Greek philosopher Archimedes.Unfortunately,this aspect of his work was not well-documented.It was not until 1619 that the mathematician Johannes Kepler reconstruct... Archimedean solids were first proposed by the ancient Greek philosopher Archimedes.Unfortunately,this aspect of his work was not well-documented.It was not until 1619 that the mathematician Johannes Kepler reconstructed the complete set of 13 Archimedean solids[1].Among these solids,only the snub cube and snub dodecahedron are chiral. 展开更多
关键词 enantiopure stereospecific assembly snub cube chiral snub dodecahedron archimedean solids archimedean polyhedra
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Metal-organic polyhedra as dynamic cross-linker for recyclable mixed matrix membranes with promising dimension stability 认领 引用
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作者 Linjie Lan Mingxin Zhang +5 位作者 Haiyan Xiao Wei Liu-Fu Yuyan Lai Jiadong Chen Jia-Fu Yin Panchao Yin 《Science China Chemistry》 SCIE EI CAS CSCD 2025年第2期705-713,共9页
Mixed matrix membranes(MMMs)are designed by incorporating microporous inorganic fillers into polymer matrix for the integration of inorganics’excellent gas separation performance with polymers’promising flexibility.... Mixed matrix membranes(MMMs)are designed by incorporating microporous inorganic fillers into polymer matrix for the integration of inorganics’excellent gas separation performance with polymers’promising flexibility.However,due to the complex interphase interaction,the prevention of long-term aging is still challenging and the poor processabilityecyclability of MMMs hinders their extensive applications.Herein,a coordination assembly protocol is developed for the fabrication of MMMs with both excellent processabilityecyclability upon thermal annealing and promising dimension stability even under high gas pressure.Polymers bearing isophthalic acid(IPA)as side chains are applied to coordinate with Cu2+and the assembled 2.5 nm microporous metal-organic polyhedra(MOP),{Cu24IPA24},serves as multi-functional cross-linkers for the polymer network formation.The MOPs’well-defined microporosity grants MMMs the capability for O2/N2 separation while their activated dynamics at high temperatures(>120℃)endows polymer networks with excellent processability.In contrast to conventional supramolecular units,the MOPs possess unique logarithmic ligand-exchange kinetics and they show nearly frozen bonding dynamics at room temperature,ensuring promising dimensional stability to overcome the long-term aging and high gas pressure effect.This work not only provides fundamental understanding of the unique relaxation dynamics of complex systems with intertwined dynamics of supramolecular bonds and polymer chains,but also paves new avenues for the fabrication of robust and recyclable MMMs and elastomers. 展开更多
关键词 dynamic bonding metal-organic polyhedra mixed matrix membrane polymer recycling gas separation
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Ferromagnetic Archimedean polyhedra{Fe24M18}(M=Fe,Ni,and Mn)with tunable electron configurations 认领 引用 被引量：1
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作者 Wen Wen Yin-Shan Meng +5 位作者 Cheng-Qi Jiao Qiang Liu Hai-Lang Zhu Ya-Ming Li Hiroki Oshio Tao Liu 《Inorganic Chemistry Frontiers》 SCIE EI 2021年第18期4239-4246,共8页
Construction of metal-organic polyhedral clusters is promising and challenging in science due to their highly symmetric structures and potential application to molecular devices.In this work,three neutral nanocages of... Construction of metal-organic polyhedral clusters is promising and challenging in science due to their highly symmetric structures and potential application to molecular devices.In this work,three neutral nanocages of{[Fe(Tp)(CN)3]24[M(H2O)2]6[M(L)(H2O)]12}·xH2O(1-Fe,2-Ni,and 3-Mn for M=Fe,Ni,Mn and x=6,2,4,respectively;Tp=hydrotris(pyrazolyl)borate and L=pyridine-4-carboxylate)were prepared through the assembly of[Fe(Tp)(CN)3]-with FeII,NiII,or MnII ions and pyridine-4-carboxaldehyde,which was oxidized to pyridine-4-carboxylic acid during the reactions.Single crystal structure analyses revealed that each cage has the same core structure of an Archimedean polyhedra,the pseudo-rhombicuboctahedron.Elemental analyses and magnetic and spectroscopic measurements were performed to determine the oxidation and spin states of the composite metal ions,demonstrating that their electron configurations can be altered by changing the metal ions and deprotonating the auxiliary ligands.In addition,magnetic studies indicated that the metal ions were ferromagnetically coupled within the cage structure.These clusters exhibited magnetocaloric effects(MCEs)with the entropy changes of 11.55 J kg-1 K-1 for 1-Fe,5.84 J kg-1 K-1 for 2-Ni,and 19.84 J kg-1 K-1 for 3-Mn at 3 K and 8.5 T,and 3-Mn is among the family of high-performance 3d-metal-based magnetic coolants. 展开更多
关键词 ferromagnetic polyhedra molecular devicesin electron configuration metal organic clusters neutral nanocages magnetic coupling archimedean polyhedra magnetocaloric effect
Metal ion attachment in cavities of metal organic polyhedra to enhance framework robustness and catalytic performance 认领 引用
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作者 Mengyu Zhu Hang Chen +6 位作者 Hairong Li Hao Zhang Lizhen Liu Qichen Hong Zizhu Yao Lihua Wang Zhangjing Zhang 《Inorganic Chemistry Frontiers》 SCIE EI 2024年第14期4432-4438,共7页
Metal–organic polyhedra(MOPs)have attracted great attention in the past two decades,but a better robustness of the polyhedra and functionalization in the cage space are still challenging in this field.Metal ions atta... Metal–organic polyhedra(MOPs)have attracted great attention in the past two decades,but a better robustness of the polyhedra and functionalization in the cage space are still challenging in this field.Metal ions attached in the cages not only help to support the pores,but also serve as functional sites.Herein,we successfully achieved control over whether hydrated copper ions enter the cages of molecular octahedra by partly replacing the auxiliary ligands on their paddle wheel clusters.The introduction of hydrated metal ions enhances the robustness of the MOP,and the MOP with a hydrated metal ion in its cage(compound 4)exhibit a higher BET surface area than the one without it(compound 2).The catalytic ability of compound 4 for methanolysis of styrene oxide is significantly improved,with a conversion rate increasing from 53%for compound 2 to 81%. 展开更多
关键词 metal organic polyhedra robustness polyhedra control whether catalytic performance metal organic polyhedra mops metal ion attachment hydrated copper ions robustness
Synthesis and Enhanced Photocatalytic Activity of Regularly Shaped Cu2O Nanowire Polyhedra 认领 引用 被引量：14
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作者 Jing Shi Jin LI +1 位作者 Xiaojian Huang Yiwei Tan 《Nano Research》 SCIE CSCD 2011年第5期448-459,共12页
A series of unique nanowire superstructures,Cu2O nanowire polyhedra,have been synthesized through a cost-effective hydrothermal route.Three types of nanowire polyhedra,namely octahedra,concave octahedra,and hexapods,w... A series of unique nanowire superstructures,Cu2O nanowire polyhedra,have been synthesized through a cost-effective hydrothermal route.Three types of nanowire polyhedra,namely octahedra,concave octahedra,and hexapods,were formed in high morphological yields(90%)by reducing cupric acetate with o-anisidine or o-phenetidine in the presence of carboxylic acids.The architectures of these Cu2O nanowire polyhedra were examined by electron microscopy,which revealed ordered,highly aligned CU2O nanowires within the polyhedral outlines.The growth of the Cu2O nanowire polyhedra is controlled by the orientation and growth rates of the nanowire branches which are adjusted by addition of carboxylic acids.Compared to the Cu2O samples reported in the recent literature,the Cu2O nanowire octahedra exhibit notably enhanced photocatalytic activities for dye degradation in the presence of H202 under visible light,probably due to the high-density charge carriers photoexcited from the branched nanowires with their special structures.Additionally,the discussion in the recent literature of the photocatalytic activity of Cu2O in the absence of H2O2 for direct photodegradation of dyes seems questionable. 展开更多
关键词 Nanowire superstructures polyhedra cuprous oxide photocatalysis morphology control
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Single-atom Pd catalyst anchored on Zr-based metal-organic polyhedra for Suzuki-Miyaura cross coupling reactions in aqueous media 认领 引用 被引量：10
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作者 Seongsoo Kim Seohyeon Jee +1 位作者 Kyung Min Choi Dong-Sik Shin 《Nano Research》 SCIE EI CSCD 2021年第2期486-492,共7页
The challenge for single-atom catalysts in various C-C cross coupling reaction exists in the development of solid supporting materials.It has been desired tofind a supporting material designed in molecular level to an... The challenge for single-atom catalysts in various C-C cross coupling reaction exists in the development of solid supporting materials.It has been desired tofind a supporting material designed in molecular level to anchor a single-atom catalyst and provide high degree of dispersion and substrate access in aqueous media.Here,we prepared discrete cages of metal-organic polyhedra anchoring single Pd atom(MOP-BPY(Pd))and successfully performed a Suzuki-Miyaura cross coupling reaction with various substrates in aqueous media.It was revealed that each tetrahedral cage of MOP-BPY(Pd)has 4.5 Pd atoms on average and retained its high degree of dispersion up to 3 months in water.The coupling efficiencies of the Suzuki-Miyaura cross coupling reaction exhibited more than 90.0%for various substrates we have tested in the aqueous media,which is superior to those of the molecular Pd complex and metal-organic framework(MOF)anchoring Pd atoms.Moreover,MOP-BPY(Pd)was successfully recovered and recycled without performance degradation. 展开更多
关键词 metal-organic polyhedra Suzuki-Miyaura cross coupling reaction structure characterization aqueous phase reaction high-degree of dispersion
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Breathing Metal-Organic Polyhedra Controlled by Light for Carbon Dioxide Capture and Liberation 认领 引用 被引量：7
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作者 Yao Jiang Peng Tan +5 位作者 Shi-Chao Qi Chen Gu Song-Song Peng Fan Wu Xiao-Qin Liu Lin-Bing Sun 《CCS Chemistry》 CSCD 2021年第6期1659-1668,共10页
Metal-organic polyhedra(MOPs)have emerged as versatile platforms for artificial models of biological systems due to their discrete structure and modular nature.However,the design and fabrication of MOPs with special f... Metal-organic polyhedra(MOPs)have emerged as versatile platforms for artificial models of biological systems due to their discrete structure and modular nature.However,the design and fabrication of MOPs with special functionality for mimicking biological processes are challenging.Inspired by the breathing mechanism of lungs,we developed a new type of MOP(a breathing MOP,denoted as NUT-101)by directly using azobenzene units as the pillars of the polyhedra to coordinate with Zr-based metal clusters.In addition to considerable thermal and chemical stability,the obtained MOP exhibits photocontrollable breathing behavior.Upon irradiation with visible or UV light,the configuration of azobenzene units transforms,leading to reversible expansion or contraction of the cages and,correspondingly,capture or liberation of CO2molecules.Such a breathing behavior of NUT-101 is further confirmed by density functional theory(DFT)calculation.This system might establish an avenue for the construction of new materials with particular functionality that mimic biological processes. 展开更多
关键词 metal-organic polyhedra breathing photoresponsive systems adsorbents carbon dioxide capture
Unique Ligand Exchange Dynamics of Metal-Organic Polyhedra for Vitrimer-like Gas Separation Membranes 认领 引用 被引量：2
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作者 Mingxin Zhang Haitao Yu +4 位作者 Qin Zou Zi-Ang Li Yuyan Lai Linkun Cai Panchao Yin 《CCS Chemistry》 CSCD 2022年第11期3563-3572,共10页
Metal-organic polyhedra(MOPs)possess a microporous framework and impose hierarchical constraints on their surface ligands,leading to the long-ignored,logarithmic ligand exchange dynamics.Herein,polymer networks with M... Metal-organic polyhedra(MOPs)possess a microporous framework and impose hierarchical constraints on their surface ligands,leading to the long-ignored,logarithmic ligand exchange dynamics.Herein,polymer networks with MOP as nanoscale cross-linkers(MOP-CNs)can integrate unique ligand exchange dynamics and microporosity,affording vitrimer-like gas separation membranes with promising mechanical performance and(re)processability.All the ligands on the MOP surfaces are confined and correlated via a 3D coordination framework and their neighboring spaces,giving rise to a high energy barrier for ligand exchange.Therefore,MOP-CNs demonstrate high mechanical strengths at room temperature due to their negligible ligand dynamics.The thermo-activated ligand exchange process with integrated network topology enables facile(re)processing and high solvo-resistance at high temperatures.This facilitates Arrhenius type temperature dependence of flowability and stress relaxation,giving rise to the simultaneous achievement of promising mechanical strengths and(re)processability.Finally,the cage topologies of MOPs endow the materials with a bonus microporous feature and spur their applications as gas separation membranes. 展开更多
关键词 metal-organic polyhedra supramolecular chemistry polymer network soft matter dynamics coordination chemistry polymer recycling gas separation membrane
Topology analysis of metal–organic frameworks based on metal–organic polyhedra as secondary or tertiary building units 认领 引用 被引量：3
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作者 Dongwook Kim Xinfang Liu Myoung Soo Lah 《Inorganic Chemistry Frontiers》 SCIE EI 2015年第4期336-360,共25页
The structural features of metal–organic frameworks(MOFs)can be analyzed based on the network structure(net)topology,composed of nodes and linkers.The connectivity and site symmetry of a node are probably the most im... The structural features of metal–organic frameworks(MOFs)can be analyzed based on the network structure(net)topology,composed of nodes and linkers.The connectivity and site symmetry of a node are probably the most important factors affecting the net topology of MOFs.Many MOFs with multiple nodes of different connectivity and site symmetry have complicated net topologies.However,the underlying net topology of some complicated MOFs could be analyzed using a hierarchical simplification approach.The underlying net topology of complicated MOFs with multi-connected nodes could be analyzed using a metal–organic polyhedron composed of multiple nodes as either a secondary building unit or a tertiary building unit.The simplified net topology provides better insight into the structural features of the complicated MOF structures and could be utilized in designing new MOF structures with known and/or unprecedented net topologies. 展开更多
关键词 tertiary building units hierarchical simplification approachthe metal organic polyhedra metal organic frameworks topology analysis net topology metal organic frameworks mofs can secondary building units
Syntheses,structures,and properties of sulfides constructed by SbS4teeter-totter polyhedra:Ba3La4Ga2Sb2S15and BaLa3GaSb2S10 认领 引用 被引量：2
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作者 Rui-Huan Duan Jin-Ni Shen +6 位作者 Chen-Sheng Lin Peng-Fei Liu Hua Lin Shang-Xiong Huang-Fu Hua-Jun Zhao Muhammad Ali Khan Ling Chen 《Inorganic Chemistry Frontiers》 SCIE EI 2017年第1期123-130,共8页
Two new pentanary sulfides Ba3La4Ga2Sb2S15(1)and BaLa3GaSb2S10(2)have been discovered by high temperature solid state reactions.Ba3La4Ga2Sb2S15features a new zero-dimensional str... Two new pentanary sulfides Ba3La4Ga2Sb2S15(1)and BaLa3GaSb2S10(2)have been discovered by high temperature solid state reactions.Ba3La4Ga2Sb2S15features a new zero-dimensional structure type,which consists of unique isolated Sb2S7dimers and GaS4tetrahedra.In contrast,with less GaS4tetrahedra in the formula,BaLa3GaSb2S10forms a one-dimensional structure which is constructed by teeter-totter(SbS4)n chains and isolated GaS4tetrahedra.On the basis of UV/Vis spectroscopy,their band gaps are determined to be 2.42 and 2.15 eV,respectively,which are much wider than that of analogue La4FeSb2S10(1.0 eV).In addition,theoretical studies illustrate the important role of Ga in expanding the band gaps with respect to Fe atoms.The calculated crystal orbital Hamilton population and electron localization function confirm that the long Sb-S bonds in Ba3La4Ga2Sb2S15(2.932(2)A)and BaLa3GaSb2S10(3.216(5)and 3.219(5)A)have weak but nonnegligible bonding interactions. 展开更多
关键词 bala gasb s band gaps ba la ga sb s pentanary sulfides sb teeter totter polyhedra high temperature solid state reactionsba la ga sb s features electron localization function sulfides
Photosensitizing metal-organic polyhedra combined with Co catalytic sites for CO2 photoreduction 认领 引用 被引量：1
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作者 Jixin Li Yaming Liu +2 位作者 Kaiyue Ma Chunguang Li Zhan Shi 《Inorganic Chemistry Frontiers》 SCIE EI 2024年第20期7081-7089,共9页
Metal-organic frameworks(MOFs)are excellent photocatalysts due to their high designability and have been intensively investigated over the last decade.However,the catalytically active sites inside bulk MOFs may not ab... Metal-organic frameworks(MOFs)are excellent photocatalysts due to their high designability and have been intensively investigated over the last decade.However,the catalytically active sites inside bulk MOFs may not absorb light and therefore fail to work,resulting in a waste of catalytically active sites.Based on this,in recent years,metal-organic polyhedra(MOP),which are structurally similar to MOFs but more dispersible,have been developed as more promising photocatalysts.Herein,we created a zirconium-based MOP(abbreviated MOP-Ru)containing[Ru(bpy)3]2+(bpy=2,2’-bipyridine)photosensitive units and bipyridine units.MOP-Ru can combine with Co2+easily to form MOP-Ru-Co.After MOP-Ru-Co is dissolved in methanol,it disperses into discrete cages,greatly facilitating the active sites’light absorption.In CO2 photoreduction experiments,dispersed MOP-Ru-Co exhibits better catalytic activity than the analogous MOF and the undispersed MOP-Ru-Co.MOP-Ru and MOP-Ru-Co show interesting color changes when exposed to intense light.Based on this phenomenon and other characterization results,the mechanism of this CO2 photoreduction reaction is that the Ru photosensitive units in MOP-Ru-Co absorb light and transfer the photogenerated electrons to the Co catalytic sites,thereby achieving efficient CO2 photoreduction. 展开更多
关键词 photosensitizing metal organic polyhedra co photoreduction light absorption co catalytic sites active sites bipyridine units dispersible catalysts metal organic frameworks
基于剪叉单元的空间可展开多面体机构设计 认领 引用
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作者 李端玲 郭富强 +3 位作者 尹晓秦 张珺威 李明 孙世超 《华中科技大学学报（自然科学版）》 EI CAS CSCD 北大核心 2026年第6期14-19,共6页
针对可展开多面体机构在多面体构型变换中存在的多自由度与空间多环过约束引发的同步驱动与可控性问题,提出一种通过植入剪叉单元构建桁架式可展开多面体机构的设计方法.基于柏拉图多面体与阿基米德多面体间几何变换原理,通过在多面体... 针对可展开多面体机构在多面体构型变换中存在的多自由度与空间多环过约束引发的同步驱动与可控性问题,提出一种通过植入剪叉单元构建桁架式可展开多面体机构的设计方法.基于柏拉图多面体与阿基米德多面体间几何变换原理,通过在多面体棱边植入剪叉单元构建了可展开四面体、立方体和十二面体三种机构,实现了从棱边线性结构向多面体表面结构的几何转换.基于螺旋理论和多环机构约束理论对三种机构进行了自由度分析,结果表明:所设计的机构均具有1个自由度,且能够通过多个剪叉单元协调运动,实现从收缩到展开的连续几何变换.此外,以可展开四面体机构为例进行运动学分析,通过几何约束条件计算了其外接球和内切球在收缩与展开状态下体积随角度变化的关系,计算结果表明:该机构基于外接球和内切球折展比分别达到1.0∶1.5和1.0∶2.8,展现出较大折展比的连续几何变换能力. 展开更多
关键词 多面体机构 剪叉单元 自由度分析 柏拉图多面体 阿基米德多面体
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