检索结果-南通市图书馆

Synthesis,Structure and Luminescence of a Novel 2D Cadmium Coordination Polymer with a Ligand Generated in situ

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第3期26卷 333-337页

作者： HUANG Xi-he sheng Tian-Lu XIANG sheng-Chang fu Rui-Biao HU sheng-Min LI Ya-Min WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The hydrothermal reaction of 1,2-dicyanobenzene with NaN3 in the presence of Cd（NO3）2 affords a novel 2D cadmium tetrazolyl-benzoate, {Cd（tzbz）（H2O）}n （H2tzbz is 2-（5-tetrazolyl）-benzoate）. The tzbz ligand is generated in situ through the [2＋3] Sharpless cycloaddition reaction and hydrolyzation. Its crystal structure was determined by single-crystal X-ray diffraction method. The crystal crystallizes in the orthorhombic system, space group Pbca with a = 9.6659（19）, b = 7.6366（15）, c = 25.964（5）A, V= 1916.5（7）A^3, Z= 8, Mr = 318.57, Dc = 2.208 g/cm^3, F（000） = 1232 and p = 2.276 mm^-1. The Cd（Ⅱ） atom is coordinated by four tzbz ligands and one water molecule to form a severely distorted pentangle bipyramid. While each tzbz ligand connects to four Cd（Ⅱ） atoms in a μ4-η1, η, η1, η1, η1 coordination mode to construct a 2D architecture of the title complex. Additionally, the title complex exhibits strong fluorescence at room temperature in the solid state.

关键词： hydrothermal synthesis in situ crystal structure cadmium

Synthesis and Structure of a Dinuclear Copper(Ⅱ)-ditetrazolate Involving in situ Ligand Synthesis

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2007年第2期26卷 161-164页

作者： HUANG Xi-he sheng Tian-Lu XIANG sheng-Chang fu Rui-Biao HU sheng-Min LI Ya-Min WU Xin-Tao State Key Laboratory of Structural Chemistry Fufian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fufian 350002 China

The hydrothermal reaction of 1,2-dicyanobenzene with NaN3 in the presence of CuC12, 2,2＇-bipyridine and H2O affords a novel dinuclear copper（Ⅱ）-ditetrazolate, [Cu（bpy）- （pdtz）]2 （Hpdtz = 5,5＂-1,2-phenylene-ditetrazole, bpy = 2,2＇-bipyridine）. The pdtz ligand is generated in situ through Sharpless 2＋3 cycloaddition reaction. Its crystal structure was determined by single-crystal X-ray diffraction method. The crystal crystallizes in the monoclinic system, space group P211n with a = 8.2096（16）, b = 18.580（4）, c = 11.838（2） A, β = 103.12（3）°, V = 1758.5（6） A^3, Z = 2, Mr = 863.83, Dc = 1.631 g/cm^3, F（000） = 876 and μ = 1.272 mm^-1. In this novel dinuclear structure, the pdtz ligand adopts a peculiar μ2-η1,η2 coordination mode.

关键词： hydrothermal synthesis in situ crystal structure copper ditetrazolate

All-fluorinated electrolyte for non-flammable batteries with ultra-high specific capacity at 4.7 V

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第10期9卷 1601-1609页

作者： Zhe Wang Zhuo Li Jialong fu sheng Zheng Rui Yu Xiaoyan Zhou Guanjie he Xin Guo State Key Laboratory of Material Processing and Die&Mould Technology Laboratory of Solid State IonicsSchool of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan430074China Electrochemical Innovation Lab Department of Chemical EngineeringUniversity College London20 Gordon StreetLondon WC1E 7JEUK

Li metal batteries(LMBs)with LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(NMC811)cathodes could release a specific energy of>500 Wh kg^(-1) by increasing the charge ***,high-nickel cathodes working at high voltages accelerate degradations in bulk and at interfaces,thus significantly degrading the cycling lifespan and decreasing the specific ***,we rationally design an all-fluorinated electrolyte with addictive tri(2,2,2-trifluoroethyl)borate(TFEB),based on 3,3,3-fluoroethylmethylcarbonate(FEMC)and fluoroethylene carbonate(FEC),which enables stable cycling of high nickel cathode(LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2),NMC811)under a cut-off voltage of 4.7 V in Li metal *** electrolyte not only shows the fire-extinguishing properties,but also inhibits the transition metal dissolution,the gas production,side reactions on the cathode ***,the NMC811||Li cell demonstrates excellent performance by using limited Li and high-loading cathode,delivering a specific capacity>220 mA h g^(-1),an average Coulombic efficiency>99.6%and capacity retention>99.7%over 100 cycles.

关键词： Fluorinated electrolyte Li metal batteries Solid electrolyte interphase Cathode electrolyte interphase Coulombic efficiency

Preparation of Al_(72)Ni_8Ti_8Zr_6Nb_3Y_3 amorphous powders and bulk materials

在线全文

学校读者我要写书评

暂无评论

International Journal of Minerals,Metallurgy and Materials 2016年第10期23卷 1187-1195页

作者： Yu Wu Xin-fu Wang fu-sheng Han Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences

Amorphous Al_（72）Ni_8Ti_8Zr_6Nb_3Y_3 powders were successfully fabricated by mechanical alloying. The microstructure, glass-forming ability, and crystallization behavior of amorphous Al_（72）Ni_8Ti_8Zr_6Nb_3Y_3 powders were investigated by X-ray diffraction（XRD）, transmission electron microscopy（TEM）, and differential scanning calorimetry（DSC）. The isothermal crystallization kinetics was analyzed by the Johnson-Mehl-Avrami equation. In the results, the supercooled liquid region of the amorphous alloy is as high as 81 K, as determined by-non-isothermal DSC curves. The activation energy for crystallization is as high as 312.6 kJ ·mol1 obtained by Kissinger and Ozawa analyses. The values of Avrami exponent（n） imply that the crystallization is dominated by interface-controlled three-dimensional growth in the early stage and the end stage and by diffusion-controlled two- or three-dimensional growth in the middle stage. In addition, the amorphous Al_（72）Ni_8Ti_8Zr_6Nb_3Y_3 powders were sintered under 2 GPa at temperatures of 673 K and 723 K. The results show that the Vickers hardness of the compacted powders is as high as Hv 1215.

关键词： amorphous alloys mechanical alloying thermal stability pressing Vickers hardness

Synthesis and Crystal Structure of a Novel heptanuclear Ruthenium- and Sodium-containing Polyoxomolybdate [{Na(H_2O)_3}_2{Ru(dmso)_3}_2(MoO_4)_3]·_3H_2O

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2006年第7期25卷 783-788页

作者： HUANG Xi-he XIANG sheng-Chang fu Rui-Biao sheng Tian-Lu ZHANG Jian-Jun LI Ya-Min WANG Long-sheng WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The title compound, [{Na（H2O）3}2lRu（dmso）3}2（MoO4）3]·3H2O, has been obtained by the reaction of Na2MoO4·2H2O with cis-Ru（dmso）4Cl2 in aqueous solution. Its crystal structure was determined by single-crystal X-ray diffraction method. The crystal crystallizes in the triclinic system, space group PI^- with a = 12.3333（3）, b = 12.6289（3）, c = 32.0284（14） A, α = 79.873（7）, β= 87.549（9）, γ = 64.500（4）°, V = 4429.5（2） A^3, Z = 4, Mr = 1358.85, Dc = 2.038 g/cm^3, F（000） = 2696 and μ = 1.874 mm^-1. The compound contains a novel pentanuclear triangle bipyramidal core, [{ Ru（dmso）3 } 2（MoO4）3]^2-, which consists of two { Ru（dmso）3 } ^2＋ fragments and three {μ2-MoO4}^2- units. furthermore, the dmso ligands bridge the pentanuclear [Ru2Mo3] core and two [Na（H2O）3]^＋ fragments together, forming a neutral heptanuclear ruthenium- and sodiumcontaining polyoxomolybdate.

关键词： synthesis crystal structure ruthenium sodium polyoxomolybdate

Three New Silver Alkylenediphosphonates with Pillar-like Open-frameworks

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2005年第11期24卷 1231-1241页

作者： fu Rui-Biao HU sheng-Min ZHANG Hui-Shuang WANG Long-sheng LI Ya-Min HUANG Xi-he WU Xin-Tao State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Science Fuzhou Fujian 350002 China

Three new silver alkylenediphosphonates, [Ag2（HO3PCH2CH2CH2CH2PO3H）] 1, [Ag4（O3PCH2CH2CH2CH2PO3）] 2 and [Ag4（O3PCH2CH2CH2PO3（H2O）] 3, have been hydrotherreally synthesized and characterized by X-ray single-crystal and powder diffraction, elemental analyses, IR and thermogravimetric analyses （TGA）. The structures of these compounds are all threedimensional pillar-like open-frameworks with 18-membered [Ag2O4P4C8] channels for compound 1 and 2, and 16-member [Ag2O4P4C6] channels for compound 3. Both 2 and 3 contain interesting twodimensional Ag（Ⅰ） networks based on Ag...Ag interactions. 1,4-Butylene- and 1,3-propylene diphosphonate groups of 2 and 3 bond the first and second maximum metal atoms among metal organodiphosphonates with linking sixteen and fifteen silver（Ⅰ） atoms, respectively. In addition, the coordinated water molecules of 3 can be reversibly removed and recovered.

关键词： hydrothermal syntheses silver diphosphonate pillar-like single crystal

Novel protection systems for the improvement in soil and water stability of expansive soil slopes

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2023年第10期20卷 3066-3083页

作者： MA Shao-kun he Ben-fu MA Min HUANG Zhen CheN sheng-jia YUE Huan School of Civil Engineering and Architecture Guangxi UniversityNanning 530004China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi UniversityNanning 530004China

To improve the soil and water stability of expansive soil slopes and reduce the probability of slope failure,novel protection systems based on polymer waterproof coatings(PWC)were used in this ***,three groups of expansive soil slope model tests were designed to investigate the effects of polyester nonwovens and PWC(P-PWC)composite protection system,three-dimensional vegetation network and PWC(T-PWC)composite protection system,and nonprotection on the soil and water behavior in the slopes under precipitation–evaporation *** results showed that the moisture change of P-PWC and T-PWC composite protected slopes was significantly smaller than that of bare slope,which reduced the sensitivity of slope moisture to environmental changes and improved its *** soil temperature of the slope protected by the P-PWC and T-PWC systems at a depth of 70 cm increased by 5.6℃ and 2.7℃,*** PWC composite protection systems exhibited better thermal storage performance,which could increase the utilization of shallow geothermal ***,the maximum average crack widths of the bare slopes were 7.89 and 3.17 times those of the P-PWC and TPWC protected slopes,respectively,and the maximum average crack depths were 6.87 and 3 times those of the P-PWC and T-PWC protected slopes,*** PPWC protection system weakened the influence of hydro–thermal coupling on the slopes,inhibited the development of cracks on the slopes,and reduced the soil *** maximum soil erosion of slopes protected by P-PWC and T-PWC systems was 332 and 164 times lower than that of bare slope,*** P-PWC and T-PWC protection systems achieved excellent"anti-seepage and moisture retention"and anti-erosion effects,thus improving the soil and water stability of *** findings can provide important guiding reference for controlling rainwater infiltration and soil erosion in expansive soil slope projects.

关键词： Soil and water stability Expansive soil slope Polymer waterproof coating Model test Soil erosion

Apoptosis induced by preoperative oral 5′-DfuR administration in gastric adenocarcinoma and its mechanism of action

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第9期12卷 1356-1361页

作者： Wen-he Zhao Shi-fu Wang Wei Ding Jian-Ming sheng Zhi-Min Ma Li-Song Teng Min Wang fu-sheng Wu Bing Luo Department of Oncological Surgery The First Affiliated Hospital of Medical College Zhejiang University Hangzhou 310003 Zhejiang Province China Bing Luo The Third People's Hospital of Wenling Taizhou 317523 Zhejiang Province China

AIM： To study the apoptosis induced by preoperative oral 5＇-DfuR administration in gastric adenocarcinorna and its mechanism of action. METHODS： Sixty gastric cancer patients were divided randomly into three groups （20 each group） before operation： group one： 5＇-DfuR oral administration at the dose of 800-1200mg/d for 3 - 5 d, group two： 500mg 5-fu ± 200 mg/d CF by venous drip for 3 - 5 d, group three （control group）. One or two days after chemotherapy, the patients were operated. Fas/FasL, PD-ECGF and PCNA were examined by immunohistochemistry and apoptotic tumor cells were detected by in situ TUNEL method. Fifty-four patients received gastrectomy, including 12 palliative resections and 42 radical resections. Six patients were excluded. Finally 18 cases in 5＇-DfuR group, 16 cases in CF ± 5-fu group, and 20 cases in control group were analyzed. RESULTS： There was no significant difference in patient mean age, gender, white blood cell count, haernatoglobin （HB）, thromboplastin, perioperative complication incidence, radical or palliation resection, invasion depth （T）, Iymphonode involvement （N）, metastasis （M） and TNM staging among the three groups. However, the PCNA index （PI） in 5＇-DfuR group （40.51 ± 12.62） and 5-fu ±CF group （41.12± 15.26） was significantly lower than that in control group （58.33± 15.69）（F=9.083, P= 0.000）. The apoptotic index （AI） in 5＇-DfuR group （14.39 ±9.49） and 5-fu±CF group （14.11±9.68） was significantly higher than that in control group （6.88 ± 7.37）（F= 4.409, P= 0.017）. The expression rates of Fas and FasL in group one and group three were 66.7% （12/18） and 50% （9/18）, 43.8% （7/16） and 81.3% （13/16）, 45.0% （9/20） and 85% （17/20）, respectively. The expression rate of FasL in 5＇-DfuR group was significantly lower than that in the other two groups （X^2=6.708, P= 0.035）. Meanwhile, the expression rate of PD-ECGF was significantly lower in 5＇-DfuR group （4/18, 28.6%） than in CF±5-fu group （9/16, 56.3%） and control group （13/20, 65.0%）（7,

关键词： Apoptosis Preoperative chemotherapy 5'-DfuR Gastric carcinoma

Chemical vapor deposition growth of crystal monolayer SnS2 with NaCl-assistant

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2019年第11期28卷 360-363页

作者： Xiao-Xu Liu Da-Wei he Jia-Qi he Yong-sheng Wang Ming fu Key Laboratory of Luminescence and Optical Information Ministry of EducationInstitute of Optoelectronic TechnologyBeijing Jiao Tong UniversityBeijing 100044China

As an important member of the two-dimensional layers of metal dichalcogenides family, the two-dimensional(2 D)group IV metal chalcogenides(GIVMCs) have been attracting intensive attention. However, the growth of monolayer tin disulfide(SnS2) remains a great challenge contrasted to transition metal dichalcogenides, which have been studied quite maturely. Till date, there have been scant reports on the growth of large-scale and large-size monolayer SnS2. here, we successfully synthesized monolayer SnS2 crystal on SiO2/Si substrates via NaCl-assisted CVD and the edge can be as long as 80 μm. Optical microscope, Raman spectroscopy, x-ray diffraction, atomic force microscopy(AFM), and energydispersion x-ray(EDX) were performed respectively to investigate the morphology, crystallographic structure, and optical property of the 2 D SnS2 nanosheets. In addition, we discussed the growing mechanism of the NaCl-assisted CVD method.

关键词： group IV metal chalcogenides tin disulfide two-dimensional materials chemical vapor deposition