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Synthesis and Characterization of Tetrametal Cluster〔Co2.CO）6〕〔μ-HC2.H2.CH2.2.-μ〕〔Co2.CO）6〕

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chinese Journal of Structural Chemistry 1999年第4期 64-67页

作者： CHEN XueNian ZHANG Jie YIN YuanQi (state key {2. for Oxo Synthesis and Selective Oxidation,lanzhou institute of chemical physics, the chinese academy of sciences, lanzhou 730000) SUN Jie (Shanghai institute of Organic Chemistry, the chinese Ac

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｅｎｓｅｉｎｔｅｒｅｓｔｉｎｔｒａｎｓｉｔｉｏｎｍｅｔａｌｃｌｕｓｔｅｒｓｃｏｎｔｉｎｕｅｓｂｅｃａｕｓｅｔｈｅｙｒｅｐｒｅｓｅｎｔｐｏｓｓｉｂｌｅｃｏｎｃｅｐｔｕａｌｂｒｉｄｇｅ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＩｎｔｅｎｓｅｉｎｔｅｒｅｓｔｉｎｔｒａｎｓｉｔｉｏｎｍｅｔａｌｃｌｕｓｔｅｒｓｃｏｎｔｉｎｕｅｓｂｅｃａｕｓｅｔｈｅｙｒｅｐｒｅｓｅｎｔｐｏｓｓｉｂｌｅｃｏｎｃｅｐｔｕａｌｂｒｉｄｇｅｓｂｅｔｗｅｅｎｈｏｍｏｇｅｎｅｏ...

关键词： cobalt dipropargyl ether carbonyl crystal structure

RHEOLOGICAL BEHAVIOR OF EPOXY RESIN WATERBORNE DISPERSIONS

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chinese Journal of Polymer Science 2001年第5期19卷 471-476页

作者： Zhen-zhong Yang Yuan-ze Xu De-lu Zhao state key {2. of Polymer physics & Chemistry, Center for Molecular Science institute of Chemistry, chinese academy of sciences, Beijing 100080 china chinese Acad Sci Inst Chem State Key Lab Polymer Phys & Chem Ctr Mol Sci Beijing 100080 Peoples R China

The waterborne dispersions of epoxy resin were prepared by the phase inversion emulsification technique. Rheological behavior and its relationship with the structural change of the systems were studied. It was shown that the concentrated dispersions were highly viscoelastic and pseudoplastic, which was attributed to the formation of a physical network among the waterborne particles via hydrogen bond. The dilute dispersions were Newtonian fluids. The discrete clusters composed of small waterborne particles were found in diluted dispersions. With increasing solid content, there existed a structural transition via percolation through a cluster-cluster aggregation mode to form the physical network, which was qualitatively evidenced by the TEM morphologies.

关键词： epoxy resin waterborne dispersion rheological behavior cluster-cluster aggregation percolation transition

Investigation of the lubrication Failure Mechanisms of Several Thin solid Films

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Investigation of the Lubrication Failure Mechanisms of Sever...

MOLECULAR STRUCTURE OF DINUCLEAR COBALT COMPLEX WITH CHELATING 1, 3-BIS (DIPHENYLPHOSPHINO ) PROPANE LIGAND

第三届摩擦疲劳学国际会议

作者： Qunji Xue Deyang Yu state key {2. of solid lubrication lanzhou institute of chemical physics chinese academy of sciences lanzhou 730000 P. R. china

＜正＞The lubrication failure mechanisms of several physical vapor deposited （PVD） thin solid films, especially of the ones for precision ball bearing and harmonic drive applications, have been investigated. The pro... 详细信息

关键词： PVD solid films Ball bearing: Harmonic drive lubrication failure mechanism

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chinese Journal of Structural Chemistry 1993年第5期 405-408页

作者： Lu Shi-Jie Yang Fan Fu Hong-XiangOSSO laboratory, lanzhou institute of chemical physics,{2., lanzhou, 730000 chinaShi Jian-QiuFujian institute of Research on the Structure of Matter,{2., Fuzhou, 350002.5}

Co2.( CO ) 6 (dppp ) Cdppp = 1,3-bis ( diphenylphosphino ) propane = Ph2.(CH2.3PPh2., Mr=698. 38, monoclinic, space group P2./c, a=14. 952.8) , b = 13.44(2., c = 16. 72.1) A. β=110.56(4)°, V=3147(9) A3, Z = 4, A=1. 47 g/cm3, λ(MoXα) = 0. 71069 A, F(000) = 142., λ(MoKα) = 11. 93 cm-1, R = 0. 032.and Rw = 0. 044 for 4553 observed independent reflections with I>4. 0σ(I). The molecular structure of the complex shows that the dppp ligand chelates one of the two cobalt atoms of the complex molecule, and there are two bridging carbonyl groups between the two cobalt atoms. The Co-Co bond length is 2. 534(3) A . The chelating dppp ligand results in the asymmetrization of the molecule.

关键词： Crystal structure Dinuclear complex Cobalt-carbonyl-dppp complex

Rheological behaviour of semi-solid succinonitrile-camphor alloy

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Journal of University of Science and Technology Beijing 2003年第1期10卷 25-29页

作者： Zhenyao Wangstate key {2. for Corrosion and Protection, institute of Metal Research, chinese academy of sciences, Shenyang 110016, china Lab. for Corrosion and Protection Inst. of Metal Res. Chinese Acad. of Sci. Shenyang 110016 China

Rheology experiments were carried out on succinonitrile-4% (mass fraction) camphor alloy, using a Haake VT550 viscometer. The results showed that the steady state viscosity of succinonitrile-4% camphor alloy in semi-solid process can be described well by the classical power law of viscosity versus shear rate, η= kγm, and the test method can be used to simulate the semi-solid processing for metals. The viscosity of the organic alloy decreases with increasing shear rate at a given temperature within liquid-solid range, and the viscosity of the organic alloy slurries increases with decreasing temperature, decreases with decreasing cooling rate. The structure and viscosity of organic alloy during solidification are strongly influenced by shear rate.

关键词： rheology semi-solid processing viscosity organic alloy microstructure

A New Sesquiterpene from Ligularia Songarica

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chinese chemical Letters 1999年第1期10卷 29-30页

作者： Bo FU Xiu Ping YANG Jie WANG Zhong Jian JIA(institute of Organic Chemistry, state {2. laboratory of Applied Organic Chemistry,lanzhou University, lanzhou, 730000) lanzhou Univ Inst Organ Chem State Key Lab Appl Organ Chem Lanzhou 730000 Peoples R China

A new bisabolane sesquiterpene, 5 beta-acetoxy-4 beta, 8-diangeloyloxy-2.beta,3 beta, :10,11-diepoxy-bisabola-7 (14)-ene, was isolated from the roots of Ligularia songarica and its structure was elucidated on the basi... 详细信息

关键词： bisabolane new sesquiterpene ligularia songarica

Fabrication Patterned Polyaniline Films by Mircocontact Printing and Area-selective Electropolymerization

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Fabrication Patterned Polyaniline Films by Mircocontact Prin...

Carbon Storage and Vertical Distribution in Three Shrubland Communities in Gurbantünggüt Desert,Uygur AutonomousRegion of Xinjiang,Northwest china

甘肃省化学会成立六十周年学术报告会暨二十三届年会

作者： Fei Guan, Jinqing Wang, Rui Zhang, Miao Chen (state key {2. of solid lubrication, lanzhou institute of chemical physics, chinese academy of sciences, lanzhou 730000, PR china)

Patterned polyaniline (PANI) films was achieved by electrochemical polymerization in the aqueous monoaniline solution and microcontact printing with elastomeric poly(dimethysiloxane) (PDMS) stamps. Optical microscope, atomic force microscopy (AFM), lateral force microscopy (LFM) and X-ray photoelectron spectroscopy (XPS) was used to examine the topography and properties of patterned PANI films. Experimental resuLts show that the interfacial properties of surface control the rate of electrochemical polymerization, and the rate on the modified silicon surface is higher than that on the bare silicon surface. In addition, through controlling experimental conditions, we can obtain films surface with reguLar pattern, clear boundary and being completely covered by PANI.

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chinese Geographical Science 2012年第5期22卷 541-549页

作者： GONG Yanming 1 ,HU Yukun 1 ,FANG Fei 1 ,LIU Yanyan 1 ,LI Kaihui 1 ,ZHANG Guangming 2.(1.key laboratory of Biogeography and Bioresource in Arid Land,Xinjiang {2. of Ecology and Geography,chinese academy of sciences,Urumqi 830011,china 2.state key laboratory of Vegetation and Environmental Change, {2. of Botany,chinese academy of sciences,Beijing 100093,china) 1. key laboratory of Biogeography and Bioresource in Arid Land Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Urumqi 830011 China 2. state key {2. of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing 100093 China

This study was carried out in the Gurbantünggüt Desert,Uygur Autonomous Region of Xinjiang,Northwest china in August,*** quantify the storage,contribution and vertical distribution patterns of plant biomass carbon (PBC)and soil organic carbon(SOC)in the study area,we investigated the carbon concentrations and its vertical distribution in three different desert shrubland communities dominated by Reaumuria soongorica,Haloxylon ammodendron+*** and Tamarix ramosissima+***,*** analyzed vertical distribution of root biomass carbon and soil carbon contents by excavating soil profiles for each dominated *** results show that SOC is considerably the larger carbon pool in the soil layers of 1.0-3.0 m(the mean value of three shrubland communities is 38.46%)and 3.0-5.0 m(the mean value is 40.2.%).In contrast,70.74%of belowground biomass carbon storage in 0-1.0 m layer,and its content decrease with increasing soil *** Haloxylon ammodendron+R. soongorica shrubland community has the highest belowground biomass carbon among three selected communities. This study highlights the importance of SOC stored in deep soil layers(lower than 3.0 m from the surface)in arid shrubland communities in the global carbon *** addition,it provides the data support for revealing deep soil solid carbon potential,and offers scientific basis for the further research in the carbon cycle of terrestrial ecosystem.

关键词： shrubland community plant biomass carbon soil organic carbon vertical distribution Gurbantünggüt desert

钴氧化铝纳米有序阵列复合结构的光学特性研究

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物理学报 2004年第5期53卷 1594-1598页

作者：李燕王成伟田军刘维民陈淼力虎林西北师范大学物理与电子工程学院兰州730070 中国科学院兰州化学物理研究所固体润滑国家重点实验室兰州730000 兰州大学化学化工学院兰州730000

对采用电化学沉积工艺制备的Co AAO纳米线有序阵列复合结构的光反射和光吸收特性进行了研究 .UV VIS NIR光谱仪测试结果表明 ,增加氧化铝模板孔洞中纳米线的长度或直径 ,Co AAO纳米有序阵列复合膜的吸收边大幅度红移 (2.83— 398nm) ,... 详细信息

对采用电化学沉积工艺制备的Co AAO纳米线有序阵列复合结构的光反射和光吸收特性进行了研究 .UV VIS NIR光谱仪测试结果表明 ,增加氧化铝模板孔洞中纳米线的长度或直径 ,Co AAO纳米有序阵列复合膜的吸收边大幅度红移 (2.83— 398nm) ,可见至近红外波段反射率大范围可调 (70 %— 6 % ) ,实验发现这种变化更加敏感于直径 .这种复合结构体系具有直接带隙半导体的光学特性 .

关键词：多孔氧化铝模板吸收边调制反射率调制纳米有序阵列电化学沉积工艺直接带隙半导体