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Synthesis and Crystal Structure of a One-dimensional Azido-bridged Manganese (II) Compound [Mn(N_3)_2(H_2O)_3·C_6H_(12)N_4]_n

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Chinese Journal of Structural Chemistry 2006年第2期25卷 135-138页

作者： CHEN Hui WANG Wen-Guo ZHANG Xiao-Feng CHEN Chang-Neng liu qiu-tian State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A new one-dimensional azido-bridged manganese compound has been prepared and structurally characterized by X-ray diffraction. The complex [Mn（N3）2（H2O）3·C6H12N4]n crystallizes in space group Pnma with a = 6.5252 （5）, b = 9.3226（7）, c = 22.2070（15） ,A°, V= 1350.89（17） ,A°^3, Z = 4, Mr = 333.24, Dc = 1.639 g/cm^3, μ = 1.005 mm^-1 and F（000） = 692. The final refinement gave R = 0.0328 and wR = 0.0777 for 1085 observed reflections with I 〉 2σ（I）. The structure contains [Mn（N3）2（H2O）3]n polymeric chains and uncoordinated hexamethylenetetramine （HMTA） molecules with Mn/HMTA molar ratio of 1：1. The Mn atoms are bridged by end-to-end azido ligands to construct one-dimensional zig-zag infinite chains. Each Mn atom is six-coordinated by three N atoms of three azido ligands and three water O atoms, resulting in an octahedral geometry. Extending hydrogenbonding interactions involving water O atoms, azido and HMTA N atoms link the chains and HMTA molecules into a three-dimensional network.

关键词： manganese crystal structure azide coordination polymer

Synthesis and Structure Characterization of a Tetranuclear Manganese(Ⅲ) Complex:[Mn_4O_2(O_2CMe)_6(MeOH)_2(dbm)_2]·2MeCOOH·2CH_2Cl_2

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Chinese Journal of Structural Chemistry 2007年第3期26卷 295-298页

作者： WANG Mei MA Cheng-Bing WANG Hui-Sheng CHEN Chang-Neng liu qiu-tian State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The title compound, [Mn4O2（O2CMe）6（MeOH）2（dbm）2]·2MeCOOH·2CH2Cl2 （Hdbm = dibenzoylmethane）, has been synthesized and structurally determined by single-crystal X-ray diffraction. The crystal belongs to triclinic, space group P/, with a = 10.729（3）, b = 12.269（3）, c = 13.085（4） A, a = 106.367（3）,β = 107.643（2）, γ = 94.771（2）°, V = 1547.9（7） A^3, Z = 1, C50H64Cl4Mn4O24, Mr= 1410.57, Dc= 1.513 g/cm^3, F（000） = 724, Rint = 0.0147, T= 293（2） K and p = 1.046 mm ^-1. The final R = 0.0359 and wR = 0.0938 for 5791 observed reflections with 1 〉 2σ（/）. The structure of the complex consists of one [Mn4（μ3-O）2]^8＋ core with four coplanar Mn atoms disposed in an extended ＂butterfly-like＂ arrangement and two O atoms triply bridging each ＂wing＂, and the peripheral ligation is provided by six by-MeCO2^-, two terminal ,μ2-dbm- groups at the two ends of the molecule, and two MeOH molecules on the central Mn atoms, lntermolecular O…H-O hydrogen bonding interactions are found within the structure of the compound.

关键词： manganese crystal structure photosystem Ⅱ hydrogen bonding

Synthesis and Crystal Structure of a Two-dimensional Cadmium(Ⅱ) Coordination Polymer:[Cd(AIP)(Bpy)]_n·nBpy(H_2AIP=5-Aminoisophthalic Acid, Bpy=2,2′-Bipyridyl)

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Chinese Journal of Structural Chemistry 2008年第2期27卷 159-162页

作者： OU Yang-Jun MA Cheng-Bing CHEN Hui WANG Hui-Sheng CHEN Chang-Neng liu qiu-tian State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A two-dimensional coordination polymer, [Cd（AIP）（Bpy）]***, was hydrothermally synthesized by the reaction of hydrate cadmium acetate with 5-aminoisophthalic acid, lithium hydroxide, vanadiumpentoxide, sodium chloride and 2,2′-bipyridyl in water solution. It crystallizes in orthorhombic, space group C222 1, absolute structure parameter 0.00（7）, with a = 15.336（4）, b = 22.390（6）, c = 14.257（3）A, V = 4896（2）/~3, C28H21CdNsO4, Mr = 603.90, Z = 8, F（000） = 2432, Dc = 1.639 g/cm^3, μ = 0.939 mm^-1, T= 298（2） K, S = 1.001, R = 0.0296 and wR = 0.0813 for 5522 observed reflections （I 〉 2a（/））. In the title complex, each 5-aminoisophthalate ligand bridges three cadmium（Ⅱ） ions to form a two-dimensional layer structure.

关键词： synthesis crystal structure cadmium complex 5-aminoisophthalic acid

Synthesis and Structural Characterization of [Mn(phen)_2(H_2O)_2](OAc)_26H_2O

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Chinese Journal of Structural Chemistry 2003年第5期22卷 525-528页

作者： ZHANG Xiao-Feng HUAND De-Guang CHEN Feng CHEN Chang-Neng liu qiu-tian② (State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou 350002, China) State Key Laboratory of Structural Chemistry Fujian Institute of Research

The title complex [Mn(phen)2(H2O)2](OAc)26H2O (phen = 1,10-phenanthroline, C12H8N2, OAc = acetate, C2H3O2) with formula C28H38MnN4O12 and Mr = 677.56 has been syn- thesized and structurally characterized by X-ray diffraction. The crystal is of triclinic, space group P ?with a = 9.6201(5), b = 13.4663(7), c = 14.5375(8) , a = 108.428(1), b =93.898(1), g = 110.492(1), V = 1639.5(2) ?, Dc = 1.373 g/cm3, F(000) = 710, = 0.468 cm-1 and Z = 2. The final refinement gave R = 0.0522 and wR = 0.1259 for 4714 observed reflections with I > 2s(I). It consists of discrete [Mn(phen)2(H2O)2]2+ cation, two acetate anions and six lattice water molecules. The MnII ion coordinated by four nitrogen atoms from two chelating phen and two oxygen atoms from two cis-related water molecules is in a distorted octahedral coordination environment. Two OAc- anions and six water molecules exist outside the [Mn(phen)2(H2O)2]2+ cation as counter ions and solvate molecules, respectively. The cations and anions are interconnected by the solvate water molecules which are hydrogen bonded to both aqua ligands and acetate oxygen atoms, building up the crystals of this compound to be a supramolecule-like aggregate.

关键词： manganese crystal structure synthesis 1 10-phenanthroline acetate

Investigation of single MoFe3S4 cubane cluster——I. First successful synthesis by spontaneous self-assembly reaction and structure of （Et4N） [MoFe3S4（Et2NCSS）5]CH3CN

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Chinese Journal of Chemistry 1986年第2期4卷 107-115页

作者： liu qiu-tian* HUANG Liang-Ren KANG Bei-Sheng liu Chun-Wan WANG Ling-Ling LU Jia-Xi, Fujian Institute of Research on the Structure of Matter, Academia Sinica, Fuzhou Fujian Institute of Research on the Structure of Matter Academia Sinica Fuzhou

A single MoFe3S4cubane-like cluster compound has been synthesized through spon-taneous self-assembly of simple inorganic salts with organosulfur ligand for the first time. （Et4N）-[MoFe3S4（Et2NCSS）5]CH3CN（1） is quite stable in air. The crystal of 1 is monoclinic with spacegroup P21/c, a=22.897（3）,b=12.399（2）,c=20.928（4）,β=97.15（1）°, and Z=4. A fullmatrix least-squares refinement with 6725 unique reflections for all nonhydrogen atoms givesR=0.068. The anion of 1 is the first isolated single MoFe3S4cubane cluster with core oxidation state [Mo-Fe3S4]4+. The distance between the two 6-coordinate metal atoms （Mo,Fe） is 2.624 , which isthe shortest M-M'bond observed for Mo-Fe-S clusters so far and the only one shorter than sim-ilar distances in FeMo-cofactor. The bond orders of this anion were calculated by EHMO method and the results coincide withthe general rule. The structural feature and the unusual stability of 1 can be attributed to the bidentatechelating effect of Et2NCSS-, which leads to high coordination of metal atoms and the various ligatedtypes.

关键词： First successful synthesis by spontaneous self-assembly reaction and structure of Et4N Investigation of single MoFe3S4 cubane cluster Et2NCSS CN

Overview and Prospect of Distributed Energy P2P Trading

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Energy Engineering 2025年第1期122卷 379-404页

作者： Jiajia liu Mingxing tian Xusheng Mao School of Automation and Electrical Engineering Lanzhou Jiaotong UniversityLanzhou730070China

After a century of relative stability in the electricity sector,the widespread adoption of distributed energy resources,along with recent advancements in computing and communication technologies,has fundamentally altered how energy is consumed,traded,and *** change signifies a crucial shift as the power system evolves from its traditional hierarchical organization to a more decentralized *** the heart of this transformation are innovative energy distribution models,like peer-to-peer(P2P)sharing,which enable communities to collaboratively manage their energy *** effectiveness of P2P sharing not only improves the economic prospects for prosumers,who generate and consume energy,but also enhances energy resilience and *** allows communities to better leverage local resources while fostering a sense of collective responsibility and collaboration in energy ***,there is still no extensive implementation of such sharing models in today’s *** on distributed energy P2P trading is still in the exploratory stage,and it is particularly important to comprehensively understand and analyze the existing distributed energy P2P trading *** paper contributes with an overview of the P2P markets that starts with the network framework,market structure,technical approach for trading mechanism,and blockchain technology,moving to the outlook in this field.

关键词： Distributed energy P2P market mechanisms classification and comparison

Research status and prospects of the fractal analysis of metal material surfaces and interfaces

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 20-38页

作者： Qinjin Dai Xuefeng liu Xin Ma Shaojie tian Qinghe Cui Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Laboratory for Advanced Materials Processing of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Mechanical and Electrical Engineering Xinjiang Institute of EngineeringUrumqi 830023China

As a mathematical analysis method,fractal analysis can be used to quantitatively describe irregular shapes with self-similar or self-affine *** analysis has been used to characterize the shapes of metal materials at various scales and *** methods make it difficult to quantitatively describe the relationship between the regular characteristics and properties of metal material surfaces and ***,fractal analysis can be used to quantitatively describe the shape characteristics of metal materials and to establish the quantitative relationships between the shape characteristics and various properties of metal *** the perspective of two-dimensional planes and three-dimensional curved surfaces,this paper reviews the current research status of the fractal analysis of metal precipitate interfaces,metal grain boundary interfaces,metal-deposited film surfaces,metal fracture surfaces,metal machined surfaces,and metal wear *** relationship between the fractal dimensions and properties of metal material surfaces and interfaces is *** from three perspectives of fractal analysis,namely,research scope,image acquisition methods,and calculation methods,this paper identifies the direction of research on fractal analysis of metal material surfaces and interfaces that need to be *** is believed that revealing the deep influence mechanism between the fractal dimensions and properties of metal material surfaces and interfaces will be the key research direction of the fractal analysis of metal materials in the future.

关键词： metal material surfaces and interfaces fractal analysis fractal dimension homogeneity

Synthesis and Crystal Structure of Mn（phen）(PhCOO)2（H2O）

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Chinese Journal of Structural Chemistry 2003年第4期 399-402页

作者： WANG Wen-Guo CHEN Feng CHEN Chang-Neng liu qiu-tian (State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, The Chinese Academy of Sciences, Fuzhou, Fujian 350002, China)

The manganese benzoate complex Mn(phen)(PhCOO)2(H2O) (C26H20MnN2O5) has been synthesized, where phen = 1,10-phenanthroline. The molecular and crystal structures were determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group P21/c with unit cell parameters: a = 10.7145(7), b = 21.218(1), c = 11.2743(7) ? ?= 117.7342(2), V = 2268.6(3) ?, Z = 4, Mr = 495.38, Dc = 1.450 g/cm3, ?= 0.623 mm-1, F(000) = 1020, T = 293(2) K, R = 0.0563 and wR = 0.1339 for 2468 observed reflections with I > 2s(I). In the crystal the manganese atom is five-coordinated by two chelated nitrogen atoms from phenanthroline, three oxygen atoms from two benzoates and one water molecule, completing a triangular bipyramid geometry. The complex exists in a dimer mode by intermolecular hydrogen-bonding interactions.

关键词： manganese complex crystal structure benzoate

Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen liu Xuliang Lin Xueqing qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling