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Studies on the Crystallization Properties and Morphology Structure of the Cationic Dyeable Polypropylene Fibers
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作者 宓林坤 陈国康 《Journal of Donghua University(English Edition)》 EI CAS 2004年第1期128-130,共3页
The crystallization properties and morphology structure of the cationic dyeable polypropylene fibers which were produced by the blending spinning method were studied by making use of X-ray and scanning electron micros... The crystallization properties and morphology structure of the cationic dyeable polypropylene fibers which were produced by the blending spinning method were studied by making use of X-ray and scanning electron microscopy (SEM). It comes to the conclusions that the larger the crystallite size in the fibers is , the better the dyeable properties of the fibers are and there is a little compatibility between the dyeable agent and polypropylene resin. And the dye-uptake of the fibers may be up to 90% because the dyeable agent can uniformly be scattered in polypropylene. 展开更多
关键词 cationic dye polypropylene fiber crystallization property morphological structure
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Synthesis, Structure and Luminescent Property of a 2D Cd(Ⅱ) Coordination Polymer Based on Mixed-ligands of 1,3-Bis(imidazol)propane and Pyridine-3,5-dicarboxylic Acid 被引量:19
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作者 卢久富 刘举 +1 位作者 姜敏 葛红光 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第2期248-252,共5页
A new Cd(Ⅱ) coordination polymer, namely, [Cd(1,3-bip)(3,5-pdc)]n (1,3-bip = 1,3-bis(imidazol)propane and 3,5-pdc = pyridine-3,5-dicarboxylic acid) has been synthesized under hydrothermal conditions. Compou... A new Cd(Ⅱ) coordination polymer, namely, [Cd(1,3-bip)(3,5-pdc)]n (1,3-bip = 1,3-bis(imidazol)propane and 3,5-pdc = pyridine-3,5-dicarboxylic acid) has been synthesized under hydrothermal conditions. Compound 1 was characterized by infrared spectrum, elemental analysis, powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction analysis. It crystallizes in monoclinic, space group P21/c with a = 1.40178(7), b = 1.72502(12), c = 1.41635(6) ran, β = 92.653(4)°, V = 3.4212(3) nm3, Z = 4, C16HIsCdNsO4, Mr = 453.73, Dc = 1.762 g/cm3, F(000) = 1808,μ = 1.310 mm1, R = 0.0899 and wR = 0.1945. In compound 1, each 3,5-pdc ligand links three Cd(lI) ions and each Cd(Ⅱ) attaches to bip ligands to form a complicated 2D double-layer structure. In addition, the thermal stability and luminescent property of 1 have been studied in the solid state at room temperature. 展开更多
关键词 Cd(Ⅱ) coordination polymer MIXED-LIGANDS crystal structure luminescent property
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Single Crystal Growth and Physical Property Characterization of Non-centrosymmetric Superconductor PbTaSe_2 被引量:2
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作者 龙雨佳 赵凌霄 +6 位作者 王培培 杨槐馨 李建奇 子海 任治安 任聪 陈根富 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第3期103-106,共4页
We report on the single crystal growth and superconducting properties of PbTaSe2 with the non-centrosymmetric crystal structure. By using the chemicM vapor transport technique, centimeter-size single crystals are succ... We report on the single crystal growth and superconducting properties of PbTaSe2 with the non-centrosymmetric crystal structure. By using the chemicM vapor transport technique, centimeter-size single crystals are success- fully obtained. The measurement of temperature dependence of electricaJ resistivity p(T) in both normal and superconducting states indicates a quasi-two-dimensional electronic state in contrast to that of polycrystalline samples. Specific heat C(T) measurement reveals a bulk superconductivity with Tc ≈ 3.75K and a specific heat jump ratio of 1.42. All these results are in agreement with a moderately electron-phonon coupled, type-g Bardeen-Cooper-Schrieffer superconductor. 展开更多
关键词 of on in Single Crystal Growth and Physical property Characterization of Non-centrosymmetric Superconductor PbTaSe2 IS that for BCS were been HIGH with
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Synthesis,Structure and Fluorescent Property of a New Isolated Zn6Co9 Heteronuclear Cluster Constructed by Four Kinds of Ligands 被引量:3
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作者 张光辉 卢久富 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第11期1666-1672,共7页
A novel zero-dimensional heteronuclear cluster based on N-(phosphonomethyl)imi- no-diacetic acid (H4PMIDA) and Phen (1,10-phenanthroline), [Zn6Co9(PMIDA)6(Phen)6(NO3)4(H2O)6]·2NO3·16H2O, has be... A novel zero-dimensional heteronuclear cluster based on N-(phosphonomethyl)imi- no-diacetic acid (H4PMIDA) and Phen (1,10-phenanthroline), [Zn6Co9(PMIDA)6(Phen)6(NO3)4(H2O)6]·2NO3·16H2O, has been synthesized under hydrothermal conditions and characterized by elemental analysis, IR spectrum, thermal analysis, and single-crystal X-ray diffraction. The isolated 15- nuclearity cluster [Zn6Co9(PMIDA)6(Phen)6(NO3)4(H2O)6]^2+ was constructed by four kinds of ligands, and its charges are balanced by NO3^–. Each isolated cluster is further extended into a 3D supramolecular network through π???π interaction and C–H…O hydrogen bonds. Moreover, the solid-state fluorescent property of this complex has also been investigated at room temperature. 展开更多
关键词 isolated heteronuclear cluster mixed ligands crystal structure fluorescent property
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Solidification and crystallization properties of CaO-SiO_2-Na_2O based mold fluxes 被引量:1
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作者 Sheng-ping He Qian Wang +3 位作者 Dan Xie Chu-shao Xu Z.S. Li K.C. Mills 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2009年第3期261-264,共4页
Crystallization properties play an important role in keeping a smooth running of continuous casting process and high surface quality of cast strands. To reduce fluorine pollution in slag, a new type of CaO-SiO2-Na2O ... Crystallization properties play an important role in keeping a smooth running of continuous casting process and high surface quality of cast strands. To reduce fluorine pollution in slag, a new type of CaO-SiO2-Na2O (CSN) based mold flux was studied. The solidification and crystallization properties, including crystallization temperature, crystallization ratio and solidification mineragraphy, were measured, which were compared with the CaO-SiO2-CaF2 (GF) mold flux. The results show that the crystallization performance is equal to the high fluoride mold powder and CSN can be used for peritectic steel grades sensitive to longitudinal cracking in continuous casting. 展开更多
关键词 mold fluxes crystallization properties mineragraphy peritectic steel
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Synthesis,Structure,and Property of a Three-dimensional Channel Quaternary Compound:Cs_(0.75(6))Er_(4.43(5))In_(3.32(6))S_(12) 被引量:3
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作者 WANG Peng LIN Hua 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第12期1873-1879,共7页
A new quaternary rare-earth sulfide, Cs0.75(6)Er443(5)In3.32(6)S12 (1), is discovered by high temperature solid state reactions with a slight excess of CsCI flux. The structure is characterized by single-cryst... A new quaternary rare-earth sulfide, Cs0.75(6)Er443(5)In3.32(6)S12 (1), is discovered by high temperature solid state reactions with a slight excess of CsCI flux. The structure is characterized by single-crystal X-ray diffraction data, while crystallizes in hexagonal space group P63/m (No. 176) with a = 12.0329(6), c = 3.8693(5)A, V= 485.18(7) A3, Z = 1, Mr = 1606.57, Dc = 5.499 g/cm3,μ = 25.457 mm-1, F(000) = 752, the final R = 0.0337 and wR = 0.0904 for 328 observed reflections with I 〉 2σ(I). Its structure features a three-dimensional framework with hexagonal channels that are centered by Cs cations. Such channels are formed by double chains of edge-sharing M(1)S6 (M(1) = Er(1)/In(1)) octahedra and single chains of Er(2)S6 triprism interconnected by corner-sharing. The syntheses, single-crystal analyses, optical band gap and magnetic property are reported. 展开更多
关键词 high temperature solid state crystal structure magnetic property optical band gap
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Ionothermal Synthesis, Crystal Structure and Photocatalytic Property of a New Cobalt Coordination Polymer 被引量:5
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作者 张甜 薛丽平 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第3期417-422,共6页
The reaction of flexible bis(imidazole) ligand and 1,2-bis(imidazol-l'-yl)methane (bimm) with Co(Ⅱ) salt under ionothermal method resulted in the formation of a new coordination polymer {[Co(bimm)3]·... The reaction of flexible bis(imidazole) ligand and 1,2-bis(imidazol-l'-yl)methane (bimm) with Co(Ⅱ) salt under ionothermal method resulted in the formation of a new coordination polymer {[Co(bimm)3]·(PF6)2}n (1). X-ray single-crystal diffraction determination reveals that 1 crystallizes in the triclinic Pi space group, with α = 8.647(6), b = 12.092(9), c = 14.967(1 l) A, α = 88.912(8), β = 81.199(8), ), = 89.395(8)°, V= 1546 (2) A3, Z = 2, Mr = 793.39, Dc= 1.704 Mg/m3,μ = 0.768 mm-1 F(000) = 798, the final R = 0.0626 and wR = 0.1634 for 4319 observed reflections with I〉 2σ(I). In compound 1, the Co(lI) ion is connected to another Co(ll) by two bimm ligands to form 1D double chains which are further linked by bimm ligands to form a 2D wavelike layer. Topologically, the structure of 1 represents a uninodal 2D 4-connected sq1/Shubnikov tetragonal plane net. Moreover, thermogravimetric analyses and photocatalytic property for 1 have also been investigated. 展开更多
关键词 cobalt coordination polymer crystal structure photocatalytic property
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Synthesis,Crystal Structure and Magnetic Property of Ternary Neodymium Zirconium Sulfide,Nd2ZrS5 被引量:3
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作者 迟洋 孙娇 郭胜平 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第5期713-717,共5页
A new ternary neodymium zirconium sulfide Nd_2ZrS_5 was synthesized by high-temperature solid-state reaction and structurally characterized by single-crystal X-ray diffraction. It crystallizes in the orthorhombic spac... A new ternary neodymium zirconium sulfide Nd_2ZrS_5 was synthesized by high-temperature solid-state reaction and structurally characterized by single-crystal X-ray diffraction. It crystallizes in the orthorhombic space group Pnma(No. 62) belonging to the Y_2HfS_5 structure-type with a = 11.461(4), b = 8.009(3), c = 7.315(3) A, Z = 2 and V = 671.5(4)A3. Its structure features NdS_8 and ZrS_7 polyhedra-constructed a 3-D network. The data of magnetic susceptibility indicate its antiferromagnetic-like behavior without magnetic order down to 2 K. 展开更多
关键词 Nd_2ZrS_5 crystal structure magnetic property
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Synthesis, Crystal Structure and Fluorescent Property of a Zn(Ⅱ) Complex with 1,3-Bis(imidazol-1-yl)benzene and 1,3-Benzenedicarboxylate 被引量:2
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作者 张春丽 郑和根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第7期1070-1076,共7页
A novel zinc complex [Zn(BIB)(bdc)]n(1, BIB = 1,3-bis(imidazol-1-yl)benzene, bdc = 1,3-benzenedicarboxylate) has been synthesized in solvothermal conditions. The title complex was characterized by elemental an... A novel zinc complex [Zn(BIB)(bdc)]n(1, BIB = 1,3-bis(imidazol-1-yl)benzene, bdc = 1,3-benzenedicarboxylate) has been synthesized in solvothermal conditions. The title complex was characterized by elemental analysis, IR spectra, thermal analysis, single-crystal and powder X-ray diffraction. The result proved that the alliance of BIB and aromatic carboxylic acids is good for the diversity of getatable structure. Complex 1 crystallizes in the monoclinic system of P2/c space group with a = 11.5591(10), b = 9.6239(8), c = 33.727(3)A, β = 103.816(3)°, V = 3643.4(5) A^3, Z = 8, μ = 1.385 mm^-1, F(000) = 1792, Dc = 1.603 g/cm^3 and Mr = 439.72 g/mol. Additionally, luminescent properties of complex 1 are also investigated and it shows good fluorescence. 展开更多
关键词 biimidazole zinc metal complex crystal structure fluorescent property
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Ionothermal Synthesis and Fluorescence Property of a Complex Constructed by Seven Nuclear(CH_3COO)_2Co_7(OH)_2] Clusters and 4,4'-Oxybisbenzoic Acid Ligand 被引量:1
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作者 李飒英 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第6期980-986,共7页
A new 3D cobalt metal-organic framework [C_7H_(13)N_2]_2[(CH_3COO)_2Co_7(oba)_5-(Hoba)_2(OH)_2]·H_2O has been synthesized under ionothermal conditions and characterized by elemental analysis, FT-IR, XRD... A new 3D cobalt metal-organic framework [C_7H_(13)N_2]_2[(CH_3COO)_2Co_7(oba)_5-(Hoba)_2(OH)_2]·H_2O has been synthesized under ionothermal conditions and characterized by elemental analysis, FT-IR, XRD, and TG. This complex crystallizes in monoclinic system, space group P21/c with a = 19.4499(4), b = 10.8839(2), c = 27.7796(5) ?, β = 104.467(2)o, V = 5694.22(19) ?~3, Z = 2, C_(116)H_(92)Co_7N_4O_(42), M_r = 2626.45, D_c = 1.532 g/cm^3 , F(000) = 2682, μ = 1.085 mm-1, R = 0.0387 and wR = 0.1177. Its structure is characterized as a 3D open framework constructed by seven nuclear clusters [(CH_3COO)_Co_7(OH)_2] and the 4,4?-oxybisbenzoic acid ligand. The used ILs cations are located in the middle of the pore and compensate for the negative charges of framework. Furthermore, its fluorescence property has also been studied. 展开更多
关键词 cobalt complex ionothermal synthesis crystal structure fluorescence property
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Structure and Luminescence Property of a Linear Tetranuclear Gold(Ⅰ)-thiolate Complex through Au-Au Interaction 被引量:1
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作者 江峰 李佳 陈忠宁 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第5期741-745,共5页
The synthesis,structure and luminescent property of a tetranuclear gold(Ⅰ)complex with doubly bridging diethyldithiocarbamate(Et2dtc)and 1,1-bis(diphenylphosphino)ethene((Ph2P)2C=CH2)are described.The compl... The synthesis,structure and luminescent property of a tetranuclear gold(Ⅰ)complex with doubly bridging diethyldithiocarbamate(Et2dtc)and 1,1-bis(diphenylphosphino)ethene((Ph2P)2C=CH2)are described.The complex crystallizes in monoclinic space group C2/c with a=26.785(7),b=25.654(6),c=12.277(3)A,β=106.879(5)°,V=8073(4)A^3,Z=8,C31H32Au2F6NO3P2S2Sb,Mr=1222.32,Dc=2.011 g/cm^3,F(000)=4592,Rint=0.0529,T=293(2)K,μ=8.157 mm^(-1),the final R=0.0464 and wR=0.1444 for 5804 observed reflections with I〉2σ(Ⅰ).The intramolecular and intermolecular Au¨Au distances are 2.8670(9)and 3.2367(9)A,respectively.Weak emission appears at 517 nm at room temperature in the solid state. 展开更多
关键词 gold(Ⅰ) complex crystal structure luminescence property
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Synthesis,Crystal Structure and Redox Property of a Copper(Ⅱ)Complex Based on 1,1-Bis(1H-benzoimidazol-2-ylmethyl)cyclohexane 被引量:1
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作者 潘荣楷 李国璧 +3 位作者 刘生桂 杨桂珍 周晓平 陈晓荧 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第3期348-354,共7页
A novel mononuclear copper(Ⅱ) complex [Cu(bbmc)Cl_2]·DMF,where bbmc is 1,1-bis(1H-benzoimidazol-2-ylmethyl)cyclohexane,was synthesized and characterized by X-ray single-crystal structure analysis.The compl... A novel mononuclear copper(Ⅱ) complex [Cu(bbmc)Cl_2]·DMF,where bbmc is 1,1-bis(1H-benzoimidazol-2-ylmethyl)cyclohexane,was synthesized and characterized by X-ray single-crystal structure analysis.The complex crystallizes in triclinic,space group P1 with a = 9.1088(5),b = 11.0075(4),c = 14.2326(6)A,α = 97.188(3),β = 96.394(4),γ = 111.430(4)°,V = 1298.73(10) A^3,Z = 2,D_c = 1.409 g/cm^3,μ(Mo Kα) = 1.074 mm^-1,F(000) = 572,S = 1.078,R = 0.0381 and w R = 0.0876 for 5593 observed reflections with I 〉 2σ(I).The central Cu(Ⅱ) ion adopts a distorted tetrahedral geometry coordinated by two nitrogen atoms of the ligand and two chloride ions.The complex showed its thermal decomposition temperature up to 226 ℃ and exhibited an irreversible one-electron transfer process involving Cu^Ⅱ/Cu^I couple. 展开更多
关键词 benzimidazole copper(Ⅱ) complex crystal structure redox property
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Solvothermal Synthesis,Crystal Structure and Photoluminescence Property of a 3D Lead(Ⅱ)Coordination Polymer Based on Terephthalic Acid 被引量:1
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作者 林小英 杨攀 +2 位作者 陈君 刘明华 林诚 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第1期61-68,共8页
Solvothermal reaction of Pb(NO3)2·6H2O with rigid linear ligand terephthalic acid(H2pta) in N,N-dimethylformamide(DMF) produced a new three-dimensional(3D) lead(Ⅱ)coordination polymer[Pb2(pta)1.5(μ... Solvothermal reaction of Pb(NO3)2·6H2O with rigid linear ligand terephthalic acid(H2pta) in N,N-dimethylformamide(DMF) produced a new three-dimensional(3D) lead(Ⅱ)coordination polymer[Pb2(pta)1.5(μ4-OH)(DMF)]n 1,and its structure was characterized by single-crystal X-ray diffraction analyses.In polymer 1,the μ4-OH bridges the nearby lead(Ⅱ) ions into an infinite one-dimensional(1D) chain,and then the organic ligand pta^2- joins the neighbored chains into a 3D structure by two similar connection modes in different configurations.The solid-state photoluminescent studies revealed that 1 exhibits a strong greenish emission mainly originating from ligand-to-metal charge transfer between the delocalized π bonds of the aromatic carboxylate ligand pta^2- and the p orbitals of the Pb^2+ centers. 展开更多
关键词 solvothermal synthesis lead(Ⅱ) coordination polymer terephthalic acid photoluminescence property crystal structure
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Synthesis,Crystal Structure and Photoluminescent Property of a Novel Dy^(3+) Coordination Compound Containing Rare(H_2O)_(22) Clusters 被引量:1
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作者 叶燕珠 吴新建 +1 位作者 张贤金 汪阿恋 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2016年第12期1980-1986,共7页
A novel Dy^(3+) coordination compound,(H_2pipz)(H_3O)[Dy(pydc)_3]·11H_2O(1,pipz = piperazine and H_2pydc = pyridine-2,6-dicarboxylic acid),has been hydrothermally synthesized and characterized by X-ray... A novel Dy^(3+) coordination compound,(H_2pipz)(H_3O)[Dy(pydc)_3]·11H_2O(1,pipz = piperazine and H_2pydc = pyridine-2,6-dicarboxylic acid),has been hydrothermally synthesized and characterized by X-ray single-crystal diffraction,elemental analysis. It is interesting that the packing structure of compound 1 contains 22-core water clusters. Compound 1 is extended into a threedimensional supramolecular structure via O···H···O hydrogen bonding interactions. Furthermore,the luminescent property of compound 1 was also investigated. 展开更多
关键词 Dy3+ coordination compound crystal structure water clusters luminescent property
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CRYSTALLIZATION AND MAGNETIC PROPERTIES OF AMORPHOUS Nd_6Fe_(81)B_(13)ALLOY
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作者 GU Benxi ZHAI Hongru Nanjing University,Nanjing,ChinaSHEN Baogen Institute of Physics,Academia Sinica,Beijing,China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1991年第8期98-102,共5页
The magnetic properties and the crystallization and its influence on the magnetic and struc- tural properties for rapidly quenched amorphous Nd_6Fe_(81)B-(13) alloy have been studied.The low temperature magnetic prope... The magnetic properties and the crystallization and its influence on the magnetic and struc- tural properties for rapidly quenched amorphous Nd_6Fe_(81)B-(13) alloy have been studied.The low temperature magnetic properties,the Curie temperature and the crystallization behavior are discussed.A small addition(6at.-%)of Nd in amorphous Fe-B alloys increases largely the crystallization temperature T_x but causes a decrease of the Curie temperature Tc·A new phase was observed in the sample annealed at 873 K. 展开更多
关键词 amorphous alloy magnetic properties crystallization structure
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Synthesis,Crystal structure and Luminescent Property of a New 3D Supramolecular Compound(C_6 H_6NO_2)_3(C_6H_5NO_2)(PW_(12)O_(40))·2H_2O
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作者 LIU Lei XU Xian-Zhu +3 位作者 ZHANG Xiao ZHANG Nan-Xi FAN Shu-Ge HUANG Yan-Ping 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第12期1813-1820,共8页
A supramolecular compound (C6H6NO2)3(C6H5NO2)(PW12O40)·2H2O including the Keggin-type [PW1O40]3- polyanion, [HC6H5NO2]+ (protonated pyridine-4-carboxylic acid molecule), C6H5NO2 (pyridine-4-carboxylic a... A supramolecular compound (C6H6NO2)3(C6H5NO2)(PW12O40)·2H2O including the Keggin-type [PW1O40]3- polyanion, [HC6H5NO2]+ (protonated pyridine-4-carboxylic acid molecule), C6H5NO2 (pyridine-4-carboxylic acid molecule) and two free H20 molecules has been synthesized by the hydrothermal method and characterized by elemental analysis, IR spectra, single-crystal X-ray diffraction and powder X-ray diffraction. The crystal belongs to orthorhombic, space group Pnnm with a = 1.0483(3), b = 1.4368(6), c = 2.0526(7) nm, V= 3.0918(18) nm3,Z = 2, F(000) = 3004, Mr= 3406.07, Dc= 1.757 g.m-3,μ = 41.241 mm-1, the final R = 0.0387 and wR = 0.1089 for 2091 observed reflections withI〉 2σ(I). A total of 30431 reflections were collected, of which 3083 were independent (Rint = 0.0605). S is 1.182. The title compound presents a 3-D structure via intermolecular hydrogen bonds among [PW12O40]3- polyanions and pyridine-4-carboxylic acid ligands. The ultraviolet and luminescence spectra have been studied at room temperature, of which the purple fluorescent emission is located at 363 nm when excited at 264 nm. Fluorescent emission of the compound derives from the π-π* transitions in the pyridine-4-carboxylic acid ligands. 展开更多
关键词 POLYOXOMETALATES hydrothermal synthesis SUPRAMOLECULE crystal structure luminescent property
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SYNTHESIS, MAGNETIC PROPERTY AND X-RAY CRYSTAL STUCTURE OF MIXED VALENT COBALT COMPLEX SALT [Co~Ⅲ Cl_2(py)_4][Co~Ⅱ Cl_3(py)]
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作者 Hao XU Jin Yu LI +4 位作者 Zhong Zhi WU Jian Zhong ZOU Zheng XU Xiao Zeng YOU Zheng Chao DONG 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第1期59-60,共2页
Complex salt Co_2Cl_5(py)_5 (py=pyridine) was obtained by the reaction of CoCl_2·6H_2O with Bu_4NMnO_4 in pyridine in the presence of benzoic acid. It is monoclinic and crystallizes in space group P2_1/n, fw=690.... Complex salt Co_2Cl_5(py)_5 (py=pyridine) was obtained by the reaction of CoCl_2·6H_2O with Bu_4NMnO_4 in pyridine in the presence of benzoic acid. It is monoclinic and crystallizes in space group P2_1/n, fw=690.64, a=28.652(5), b=14.108(4), c=7.424(3) ;β=90.09(1); V=3001(2)~3; Z=4, Dc=1.53g/cm^3. Final R factor is 0.041. The structure consists of a discrete cation [Co~ⅢCl_2(py)_4]^+ and an anion [Co~Ⅱ Cl_3(py)]^-. The Co~Ⅲ ion is coordinated by two Cl^- and four pyridine nitrogen atoms to form an octahedral geometry, and Co~Ⅱ is coordinated by three Cl^- and one pyridine nitrogen atom to form the apices of a tetrahedron. The variable-temperature magnetic susceptility measurement shows no magnet-exchange interaction between Co~Ⅲ and Co~Ⅱ ions. 展开更多
关键词 CO Cl3 MAGNETIC property AND X-RAY CRYSTAL STUCTURE OF MIXED VALENT COBALT COMPLEX SALT SYNTHESIS PY
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Crystallization and Luminescence Properties of Sm3+-Doped SrO-Al2O3-SiO2 Glass-Ceramics
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作者 李宏 LIU Liwang +3 位作者 TANG Xiaozhe WANG Qian Paul W Wang 王伟 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第5期1025-1031,共7页
The Sm^(3+)-doped SrO-Al2O3-SiO2(SAS) glass-ceramics with excellent luminescence properties were prepared by batch melting and heat treatment. The crystallization behavior and luminescent properties of the glass-... The Sm^(3+)-doped SrO-Al2O3-SiO2(SAS) glass-ceramics with excellent luminescence properties were prepared by batch melting and heat treatment. The crystallization behavior and luminescent properties of the glass-ceramics were investigated by DTA, XRD, SEM and luminescence spectroscopy. The results indicate that the crystal phase precipitated in this system is monocelsian(SrAl2Si2O) and with the increase of nucleation/crystallization temperature, the crystallite increases from 66 % to 79 %. The Sm(3+)-doped SAS glass-ceramics emit green, orange and red lights centered at 565, 605, 650 and 715 nm under the excitation of 475 nm blue light which can be assigned to the 4 G5/2→6 Hj/2(j=5, 7, 9, 11) transitions ofSm^(3+), respectively. Besides, by increasing the crystallization temperature or the concentration ofSm^(3+), the emission lights of the samples located at 565, 605 and 650 nm are intensified significantly. The present results demonstrate that theSm^(3+)-doped SAS glassceramics are promising luminescence materials for white LED devices by fine controlling and combining of these three green, orange and red lights in appropriate proportion. 展开更多
关键词 Sm3+-doped SrO-Al2O3-SiO2 glass-ceramic crystallization luminescence properties
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A Novel Preparation of Artificial Bile Ducts for Clinical Application of Biliary Diseases
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作者 史同娜 杨庆 +1 位作者 邵梅玲 张洪瑞 《Journal of Donghua University(English Edition)》 EI CAS 2012年第3期244-248,共5页
The aim of this paper was to prepare an artificial bile duct using polytetrafluoroethylene(PTFE) for the development of a new treatment for biliary diseases. The basic properties of the PTFE material, such as crysta... The aim of this paper was to prepare an artificial bile duct using polytetrafluoroethylene(PTFE) for the development of a new treatment for biliary diseases. The basic properties of the PTFE material, such as crystallization properties, were characterized; the surface structures of the sample tubes were observed by scanning electron microscope(SEM) and water permeability test of different tubes was evaluated by osmosis device. Six Shanghai white pigs were selected to do the implantation surgery of the artificial biIe ducts. After 90 days, the artifidai bile ducts were removed from the pigs and characterized by electron microscope in order to study the tissue compatibility. The results of animal test indicated that the artificial bile duct had good tissue compatibility. This new artificial bile duct shows great potential for the treatment of biliary diseases. 展开更多
关键词 polytetrafluoroethylene (PTFE) crystallization property artiarticiol bile duct animal test
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Research on mold flux for hypo-peritectic steel at high casting speed 被引量:3
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作者 Heming Zhao Xinhua Wang Jiongming Zhang 《Journal of University of Science and Technology Beijing》 CSCD 2007年第3期219-224,共6页
Mold fluxes having adaptable properties were developed in the laboratory to solve quality defects, such as depressions and longitudinal cracks when casting hypo-peritectic steel at high casting speed. Firstly, the eff... Mold fluxes having adaptable properties were developed in the laboratory to solve quality defects, such as depressions and longitudinal cracks when casting hypo-peritectic steel at high casting speed. Firstly, the effect of components on the high basicity mold flux properties was first studied using the orthogonal method. In the scope of the studied content, Li2O has the largest effect on the melting temperature, and the least effect on the viscosity; CaF2 has the largest effect on the viscosity, and the least effect on the melting temperature; Na2O and CaO/SiO2 have no obvious influence on the melting temperature and viscosity. Secondly, two powders (Z1 and Z6) have reasonable viscosity-temperature curves, higher solidification temperatures, and porous structure after solidification, but the crystal property of Z6 is worse than that of Z1, and thus Z1 is more suitable for continuous casting hypo-peritectic steel at high casting speed. Thirdly, a higher basicity of powder, a less free enthalpy of crystal compound, and a lower baffle energy are good for a higher tendentiousness of crystal. 展开更多
关键词 hypo-peritectic steel mold flux crystal property heat flux
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