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Synthesis and Crystal Structure of 3,3'-Dimethyl-dibenzo-18-crown-6

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Chinese Journal of Structural Chemistry 2006年第6期25卷 757-760页

作者： NIU Mei-Ju DOU Jian-Min wang da-qi LI da-Cheng Department of Chemistry Liaocheng University Liaocheng 252059 China

3,3′-Dimethyl-dibenzo-18-crown-6 was synthesized and characterized by elemental analysis, FT-IR, ^1H NMR, UV, MS spectra and X-ray single-crystal diffraction. It belongs to orthorhombic, space group Pna21 with a = 8.0790（18）, b = 16.780（4）, c = 15.222（3） .A, Z= 4, V= 2063.6（8） A3 Dc = 1.250 g/cm^3,μ = 0.090 mm^-1, F（000） = 832, R = 0.0474 and wR = 0.1103. According to structural analysis, the title compound possesses a boat-like configuration.

关键词： crown ether 3,3'-dimethyl-dibenzo-18-crown-6 synthesis crystal structure

Synthesis and Crystal Structure of a Sandwiched Trinuclear Complex [Tl_2(18-Crown-6)_2Pt(CN)_4]·2H_2O

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Chinese Journal of Structural Chemistry 2006年第6期25卷 677-680页

作者： LIU Feng-Hui CHEN Wan-Zhi wang da-qi Department of Chemistry Zhejiang University Hangzhou 310028 China Department of Chemistry and Chemical Engineering Liaocheng University Liaocheng 252059 China

The trinuclear complex bis（18-crown-6）thallium tetracyanoplatinate [Tl2（1 8-crown- 6）2Pt（CN）4]·2H2O was prepared and its structure was determined by X-ray diffraction analysis. The compound （C28H52N4O14PtTl2, Mr = 1272.57） crystallizes in monoclinic, space group P21/n with a = 10.5180（10）, b = 8.6162（8）, c = 21.118（2） A, β= 92.577（2）°, V= 1911.9（3） A^3, Z = 2, Dc = 2.211 g/cm^3, F（000） = 1200,μ= 12.123 mm^-1, R = 0.0181 and wR = 0.0427. The linearly arranged three metals are sandwiched by two 18-crown-6 molecules.

关键词： platinum thallium cyanide 18-crown-6 crystal structure

Low-temperature heat capacities and standard molar enthalpy of formation of N-methylnorephedrine C11H17NO（s）

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Chinese Physics B 2008年第9期17卷 2859-2866页

作者： Di You-Ying wang da-qi Shi Quan Tan Zhi-Cheng College of Chemistry and Chemical Engineering Liaocheng University Liaocheng 252059 China Thermochemistry Laboratory Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

This paper reports that low-temperature heat capacities of N-methylnorephedrine C11H17NO（s） have been measured by a precision automated adiabatic calorimeter over the temperature range from T=78K to T=400K. A solid to liquid phase transition of the compound was found in the heat capacity curve in the temperature range of T=342-364 K. The peak temperature, molar enthalpy and entropy of fusion of the substance were determined. The experimental values of the molar heat capacities in the temperature regions of T=78-342 K and T=364-400 K were fitted to two poly- nomial equations of heat capacities with the reduced temperatures by least squares method. The smoothed molar heat capacities and thermodynamic functions of N-methylnorephedrine C11H17NO（s） relative to the standard refer- ence temperature 298.15 K were calculated based on the fitted polynomials and tabulated with an interval of 5 K. The constant-volume energy of combustion of the compound at T=298.15 K was measured by means of an isoperibol precision oxygen-bomb combustion calorimeter. The standard molar enthalpy of combustion of the sample was calculated. The standard molar enthalpy of formation of the compound was determined from the combustion enthalpy and other auxiliary thermodynamic data through a Hess thermochemical cycle.

关键词： N-methylnorephedrine C11H17NO(s) heat capacity constant-volume energy of combus-tion standard molar enthalpy of formation

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Synthesis and Structural Characterization of a Polyoxomolybdate HNa_7[Mo_(36)O_(112)(H_2O)_(16)]·47H_2O

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Chinese Journal of Structural Chemistry 2007年第2期26卷 165-171页

作者： LIU Ying DOU Jian-Min wang da-qi ZHANG Xian-Xi LI da-Cheng JIA Ying-Chun College of Chemistry and Chemical Engineering Liaocheng University Liaocheng 252059 China

A new polyoxomolybdate complex HNaT[Mo36O112（H2O）16]·47H2O 1 has been prepared in the beaker solution and characterized by single-crystal X-ray diffraction and elemental analyses. Crystal data： H127Mo36Na7O175, Mr = 6542.79, monoclinic, C2/c, a = 40.891（6）, b = 17.900（3）, c = 25.580（4）A, β = 125.673（2）°, V = 15210（4）A3, Z = 4, Dc = 2.857 g/cm^3, F（000） = 12464,μ = 3.013 mm^-1, R = 0.0633 and wR = 0.1654 （I 〉 20（I））. With the bridging sodium cations, the [Mo36Ou2（H2O）16]^8- units in compound 1 are linked to form a one-dimensional structure, on the basis of which a three-dimensional architecture is further constructed via other sodium cations and complicated hydrogen bonds.

关键词： polyoxomolybdate molybdate sodium X-ray analysis

Syntheses and Crystal Structures of Four New Complexes [Mn(4,4′-bip)_2(OH_2)_4](DBA)·4H_2O and [M(OH_2)(HDPA)_2]·3H_2O (M = Mn,Co,Ni)

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Chinese Journal of Structural Chemistry 2006年第8期25卷 895-902页

作者： LIU Ying DOU Jian-Min wang da-qi LI da-Cheng XU Feng ZHOU Lei SU Huai-Jing College of Chemistry and Chemical Engineering Liaocheng University 252059 China

Four new transition metal complexes, [Mn（4,4′-bip）2（OH2）4]（DBA）-4H2O 1 （4,4′-hip = 4,4′-bipyridine, H2DBA = benzene-1,3-dicarboxylic acid） and [M（OH2）（HDPA）2]-3H2O （M = Mn 2, M = Co 3, M = Ni 4, H2DPA = 2,6-pyridine-dicarboxylic acid）, have been prepared from the reaction of transition metals and carboxylic acids, and characterized by X-ray and elemental analyses. For compound 1, the packing diagram shows that a three-dimensional network is formed via hydrogen bonds and strong π-πinteractions. For compounds 2, 3 and 4, a double-helical chain is formed through hydrogen bonds. Moreover, a three-dimensional network is constructed from chains via complicated hydrogen bonds between crystal water molecules and oxygen atoms of HDPA^-.

关键词： manganese cobalt nickel 4,4′-bipyridine benzene-1,3-dicarboxylic acid 2,6-pyridine-dicarboxylic acid X-ray analysis

Synthesis, Structure, and Magnetic Properties of One Polyoxometalate (W/Mo) Compound: H_8K{[Ni(H_2O)_5]_2(H_2Mo_(1.80)W_(10.20)O_(42))}Cl_3·16H_2O

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Chinese Journal of Structural Chemistry 2007年第5期26卷 599-605页

作者： LIU Ying DOU Jian-Min wang da-qi ZHANG Xian-Xi LI da-Cheng XU Feng ZHOU Lei College of Chemistry and Chemical Engineering Liaocheng University Liaocheng 252059 China

One new polyoxometalate compound connected via nickel/potassium cations, H8K{[Ni（H2O）5]2（H2Mo1.80W10.20O42）}Cl3·16H2O 1, was prepared and characterized by elemental analysis and IR spectroscopy. Single-crystal X-ray diffraction analysis results reveal that clusters of [Ni（H2O）5]2（H2Mo1.80W10.20O42）}^6-in compound 1 are linked by potassium cations to form one- dimiensional chains, based on which a three-dimensional network is further constructed via the hydrogen bonds of O…O and O…Cl. Magnetic measurements show that compound 1 has paramagnetic properties. Crystal data： H62Cl3KMo1.80Ni2O68W10.20, Mr = 3461.33, monoclinic, space group C2/c, a = 18.9291（19）, b = 16.6758（17）, c = 19.1064（19）A, β = 106.6880（10）°, V = 5777.1（10）A^3, Z = 4, Dc = 3.980 g/cm^3, F（000） = 6250, μ = 21.574 mm^-1, R = 0.0579 and wR = 0.1623 （Ⅰ 〉 2σ（Ⅰ））.

关键词： polyoxomolybdate molybdate nickel sodium X-ray analysis magnetic

Synthesis and Structure of a Two-dimensional Double Chain Iron(Ⅱ) L-Trp Coordination Polymer [Fe(L-trp)_2(HL-trp)_2]_n

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Chinese Journal of Structural Chemistry 2008年第2期27卷 153-158页

作者： wang Jian XU Xing-You MA Wei-Xing XU Rui-Bo TONG Yu-Ping LU Lu-De YANG Xu-Jie wang da-qi Materials Chemistry Laboratory Nanjing University of Science and Technology Nanjing 210094 China Huaihai Institute of Technology Lianyungang 222005 China School of Chemistry and Chemical Engineering LiaochengUniversity Shandong 252059 China

The title complex [Fe（L-trp）2（HL-trp）2]n （L-trp = L-tryptohan or 2-amino-3-（1H -indol-3-yl）-propanoic acid） has been formed by a hydrothermal method involving hexaaquacobaltous perchlorate and L-tryptophan. The product was characterized by elemental analysis, IR spectra and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P211c, with a = 19.828（3）, b = 5.4233（14）, c = 9.2796（16） A, β= 97.691（2）°, V = 988.9（3） A3, Z = 2, Mr = 462.29, Dx = 1.553 g/cm3, F（000） = 480,/a = 0.802 mm^-1, the final R = 0.0399 and wR = 0.0930 for 1738 observed reflections with I 〉 2σ（/）. The structural analysis shows that the complex assumes a two-dimensional double chain plane structure.

关键词： crystal structure Fe(Ⅱ) complex L-tryptophan polymer synthesis

[Eu(C_(10)H_9N_2O_4)(C_(10)H_8N_2O_4)(H_2O)_3]_2·phen·4H_2O超分子化合物的晶体结构、荧光性质及热稳定性

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高等学校化学学报 2005年第3期26卷 401-406页

作者：杨锐何水样武望婷史启祯王大奇西北大学化学系/陕西省物理无机化学重点实验室聊城大学化学系聊城252000

在水 -乙醇混合体系中 ,以 2 -羰基丙酸水杨酰腙 (C1 0 H1 0 N2 O4 ,简作 H3L)、 1 ,1 0 -菲啉 C1 2 H8N2 ,简作phen)与 Eu(NO3) 3· 4H2 O反应 ,首次培养出黄色单晶 [Eu(C1 0 H9N2 O4 ) (C1 0 H8N2 O4 ) (H2 O) 3]2 · phen·4H2 O.... 详细信息

在水 -乙醇混合体系中 ,以 2 -羰基丙酸水杨酰腙 (C1 0 H1 0 N2 O4 ,简作 H3L)、 1 ,1 0 -菲啉 C1 2 H8N2 ,简作phen)与 Eu(NO3) 3· 4H2 O反应 ,首次培养出黄色单晶 [Eu(C1 0 H9N2 O4 ) (C1 0 H8N2 O4 ) (H2 O) 3]2 · phen·4H2 O.该晶体属三斜晶系 ,P1空间群 ,晶胞参数 a=1 .3 786(1 2 ) nm,b=1 .3 988(1 2 ) nm,c=1 .75 97(1 6)nm,α=73 .977(1 1 )°,β=68.5 98(1 2 )°,γ=71 .2 2 4(1 2 )°,V=2 9.42 (4 ) nm3,Z=2 ,μ=2 .2 0 8mm- 1 ,Dc=1 .746Mg/m3,F(0 0 0 ) =1 5 5 6,R=0 .0 3 77,ωR=0 .0 744,GOF=0 .91 6.每个配合物晶体中均有两个相似的结构单元 ,每个结构单元中铕 ( )配位数为 9,分别与两个 2 -羰基丙酸水杨酰腙和 3个水分子配位 ;每个2 -羰基丙酸水杨酰腙中的羧基氧、酰胺基中的羰基氧和 C N中的氮与 Eu3+ 配位 ,形成两个共边的稳定的五元环 ,另 3个配位原子则分别来自 3个水分子中的氧原子 ,该结构单元在空间呈扭曲的单帽四方反棱柱 ,而在每两个铕的九配位单元周围还有一个游离的 1 ,1 0 -菲啉分子和 4个水分子 .IR,1 H NMR及热分解结果佐证了配合物的组成 .该配合物具有很好的荧光特性 .

关键词：铕配合物 2-羰基丙酸水杨酰腙 1,10-菲哕啉晶体结构荧光性质热分解

Upcycling of monomers derived from waste polyester plastics via electrocatalysis

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Journal of Energy Chemistry 2025年第2期101卷 535-561页

作者： Haoye wang Richard Lee Smith Jr Xinhua qi College of Environmental Science and Engineering Nankai University Graduate School of Environmental Studies Tohoku University

Electrocatalysis offers efficient and targeted conversion of monomers derived from waste polyester plastics to chemical products under ambient temperature and pressure *** review provides analysis of research on electrochemical upgrading of monomers derived from waste polyester plastics published from2021 to *** for assessing upgrading of waste polyester plastics include alkaline hydrolysis pretreatment,indices of electrochemical reaction process(activity,stability,and techno-economic a nalysis),separation,and product *** of depolymerization monomers and their value-added products are summarized along with electrocatalytic mechanisms and reaction ***,cathode coupled reactions offer significant value for anodic waste plastic oxidation during electrolysis *** of bifunctional electrocatalysts can reduce the cost of coupled systems and complexity of the *** and recycling of waste plastic monomers using electrocatalytic technology should undergo downstream processing to form high-value products containing C-N and C-S derived functional groups obtained from depolymerized monomers,Electrochemical conversion and upgrading of monomers derived from waste polyester plastics can contribute to industrialization and global economies and help to realize environmental sustainability.

关键词： Coupling reaction Electrocatalysis Monomer Upgrade recycling Value-added products Waste plastics