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Characterization and Tribological Behavior of Octadecene,Dodecene and Undecenoic Acid Films on si substrate

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Journal of Materials science & Technology 2005年第5期21卷 671-674页

作者： Jinfang ZHOU+ and shengrong YANGstate key laboratory of solid Lubrication, lanzhou institute of chemical physics, chinese academy of sciences, lanzhou730000, china state key laboratory of solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

The films of octadecene, dodecene, and undecenoic acid were prepared on H-terminated si surface in the presence of ultraviolet irradiation. The resulted films were characterized with water-contact angle measurement and infrared spectroscopy. The friction-reducing behavior of the prepared films was examined on a static-dynamic friction coefficient measurement apparatus and on an atomic force microscope. It was found that all the reacted films on the si substrate showed good friction-reducing ability; especially, the film of the octadecene exhibited the best friction-reducing ability. This was attributed to the transfer of the reacted films onto the counter face with formation of a transfer film on the counterpart surface, which led to the transformation of the sliding between the reacted films and the hard ceramic to fiat between the reacted films and its transfer film on the counterpart surface. The macroscopic and microscopic friction behaviors of the prepared films were dependent on their molecular chain lengths. Thus the octadecene reacted film with the highest degree of ordering arrangement showed the best friction-reducing and antiwear abilities in sliding against si3N4.

关键词： Alkese Reaction film Hydrogen-terminated silicon Tribological behavior

Reaction Chemistry of W-Mn/siO2 Catalyst for the Oxidative Coupling of Methane

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Journal of Natural Gas Chemistry 2003年第1期12卷 1-9页

作者： shuben Listate key laboratory for Oxo synthesis and selective Oxidation, lanzhou institute of chemical physics, chinese academy of sciences, lanzhou 730000, china stt. key Lab. Oxo synth./sel. Oxid. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

Reaction chemistry of the OCM reaction on W-Mn/siO_2 catalyst has beenreviewed in this account. Initial activity and selectivity, stability in a long-term reaction,reaction at elevated pressures and a modelling test in a stainless-steel fluidized-bed reactor showthat W-Mn/siO_2 has promising performance for the development of an OCM process that directlyproduces ethylene from natural gas. A study on surface catalytic reaction kinetics and used catalyststructure characterization revealed a possible reason why C_2 and CO_x selectivity changed duringthe long-term reaction. Further improvement of the catalyst composition and preparation methodshould be a future direction of study on OCM reaction over W-Mn/siO_2 catalyst.

关键词： W-Mn/siO_2 catalyst oxidative coupling of methane elevated pressure methane

Asymmetric Catalytic Hydrogenation Using Rhodium Diphosphinites Derived From D-glucose and D-mannitol

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chinese chemical Letters 2000年第7期11卷 587-588页

作者： Peng JIANG shi Jie LU(state key laboratory of Oxo synthesis and selective Oxidation, lanzhou institute of chemical physics, chinese academy of sciences, lanzhou 730000) state key Lab. Oxo synthesis s. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

Three diphosphinites were synthesized for preparing rhodium-diphosphinite complexes. The complexes were used for asymmetric catalytic hydrogenation of amino acid precursor alpha-acetamidocinnamic acid and its methyl e... 详细信息

关键词： asymmetric catalysis hydrogenation rhodium diphosphinites alpha-acetamidocinnic acid

Three Novel Eremophilanolides from Ligularia virgaurea ***

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chinese chemical Letters 2004年第12期15卷 1441-1444页

作者： Quan Xiang WU Yan Ping sHI Li YANG state key laboratory of Applied Organic Chemistry, lanzhou University, lanzhou 730000 lanzhou institute of chemical physics chinese academy of sciences (CAs) lanzhou 730000 state key Lab. of Appl. Organ. Chem. Lanzhou University Lanzhou 730000 China lanzhou Inst. of chemical physics Chinese Academy of Sciences (CAS) Lanzhou 730000 China

From the alcoholic extract of the whole plant of Ligularia virgaurea spp. oligocephala,three novel eremophilane sesquiterpene lactones, 6α, 10α-dihydroxy-1-oxoeremophila- 7(11),8(9)-dien-8, 12-olide, 6β, 10α-dihydroxy-1-oxoeremophila-7 (11), 8 (9)-dien-8, 12-olide and10α-diydroxy-1-oxoeremophila-7(11), 8 (9)-dien-8, 12 olide were isolated. Their structure s wereelucidated by various, spectroscopic methods including intensive 2D NMR techniques (COsY,HMQC, HMBC and ~1H-~1H NOEsY) and HR-Ms.

关键词： Ligularia virgaurea spp oligocephala Compositae sesquiterpene lactones eremophilanolides.

Friction-reducing and antiwear behavior of metal halide-stabilized linear phosphazene derivatives as lubricants for a steel-on-steel contact

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science china(Technological sciences) 2005年第3期48卷 282-291页

作者： ZHU Jiamei 1,2 , LIU Weimin 2 & LIANG Yongmin 2 1. school of chemical Engineering and Technology, china University of Mining and Technology, Xuzhou 221008, china 2. state key laboratory of solid Lubrication, lanzhou institute of chemical physics, chinese academy of sciences, lanzhou 730000, china school of chemical Engineering and Technology China University of Mining and Technology Xuzhou China state key laboratory of solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou China

A series of novel metal halide-stabilized linear phosphazene derivatives were synthesized. The friction-reducing and antiwear abilities of the resulting products as the lubricants for a steel-on-steel contact were comparatively investigated on an Optimol sRV oscillating friction and wear tester. The morphology of the worn steel surface was observed on a scanning electron microscope, while the chemical states of some typical elements on the worn steel surface were examined by means of X-ray photoelectron spectroscopy. It was found that both the side branch structures and central metals influenced the friction-reducing and antiwear behaviors of the synthetic derivatives as the lubricants, which was related to the different adsorption activities of the organic compounds composed of different organic ingredients and metallic ions on a nascent metal surface. All the synthetic lubricants except for the iron (III) derivative showed increased antiwear abilities with increasing metallic ionic radius. A protective layer originated from the tribochemical reaction together with the adsorbed boundary lubricating layer containing organic fluorine compounds, nitrogen oxide, and Fe 3 (PO 4 ) 2 plays an important role in improving the friction and wear behavior of the steel-on-steel system.

关键词： metal halide-stabilized linear phosphazene derivatives,lubricant,steel,tribological properties.

Ice core dust particulate by XPs-sEM/EDAX——Impact of dust particulate on sO_4^(2-) record in ice cores

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chinese science Bulletin 1999年第15期44卷 1424-1427页

作者： LI Zhongqin , LU Gongxuan , LIU Baozhong , FU Hongxiang LIU YuTianshan Glaciological station , lanzhou institute of Glaciology and Geocryology , chinese academy of sciences , lanzhou 730000,china state key laboratory for Oxo synthesis and selective Oxidation, lanzhou institute of chemical physics , chinese academy ofsciences , lanzhou 730000, china, Tianshan Glaciological station Lanzhou Inst. Glaciol. Geocryology Chinese Academy of Sciences Lanzhou 730000 China state key Lab. Oxo synthesis s. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

The ice core dust particulate sampled from Mt. Xixabangma has been analyzed by means of X-ray photoelectron spectrometer （XPs） and scanning electron microscope with energy dispersion X-ray analysis （sEM/EDAX）. The results show that the contents of sOsub>4sub>sup>2-sup> and sOsub>3sub>sup>2-sup> in the surface layer of the dust are significantly higher than those in the subsurface layer （with the exception of organic sulfide）. This difference indicates that the surface sOsub>xsub> has been captured and then chemically converted by the atmospheric dust particulate before its deposition with snow, which is obviously different from those inner layer sulfates and sulfites contained by dust itself. In addition, it has been determined by sEM/EDAX that the dust contains relatively high concentrations of transition metal elements such as Fe and Ti oxides which could function as photocatalysts to the conversion of sOsub>xsub> adhered on the surface of the dust, and consequently accelerate the deposition of sOsub>xsub> to snow. Our research also

关键词： ice core records dust partculate sulfate ions.

The solid lubricating material experiment device for shenzhou-7 spaceship

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science china(Technological sciences) 2010年第9期53卷 2521-2527页

作者： WANG Ke1,2,REN WeiJia1,WANG shiDa1 & WENG LiJun3 1 academy of Opto-Electronics,chinese academy of sciences,Beijing 100190,china 2 Graduate University of chinese academy of sciences,Beijing 100049,china 3 lanzhou institute of chemical physics,chinese academy of sciences,lanzhou 730000,china academy of Opto-Electronics Chinese Academy of Sciences Beijing China Graduate University of chinese academy of sciences Beijing China lanzhou institute of chemical physics Chinese Academy of Sciences Lanzhou China

A solid lubricating material exposure experiment in space is one of the missions during the seventh manned spaceflight of china,and the key is to develop a device which can be fixed reliably outside of the orbital module and can be fetched conveniently by an astronaut during space *** solid lubricating material experiment device needs to be locked reliably in a vibrating and impacting environment during the launch phase,and should meet the requirement that it can be unlocked and fetched reliably by the astronaut wearing an extravehicular spacesuit via simple operations in orbit in an environment of high and low *** for the device we developed,the environmental characteristic of the mission was analyzed,the mechanical analysis and thermal analysis were carried out,and then a mechanism with functions of mechanical locking,structural self-locking and manual unlocking was *** device was verified by a sequence of experiments and was fetched by the astronaut during the flight of the shenzhou-7 spaceship.

关键词： manned spaceflight exposure experiment mechanism unlock

syntheses of Clusters Containing C2M2（M=Co,Mo）Cores and Crystal structure of 〔dpp〕〔Mo2Cp2（CO）4〕·CH2Cl2

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chinese Journal of structural Chemistry 1999年第4期18卷 35-40页

作者： CHEN XueNian ZHANG Jie YIN YuanQi (state key laboratory for Oxo synthesis and selective Oxidation,lanzhou institute of chemical physics, the chinese academy of sciences, lanzhou 730000)ZsUN Jie (shanghai institute of Organic Chemistry, the chinese Acad state key Lab. Oxo synthesis s. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China shanghai Inst. of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｅｘｔｅｎｓｉｖｅａｎｄｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆｔｈｅｃｈｅｍｉｓｔｒｙｏｆｄｉｎｕｃｌｅａｒｔｒａｎｓｉｔｉｏｎｍｅｔａｌｃｏｍｐｌｅｘｅｓｂｒｉｄｇｅｄｂｙｕｎｓａｔｕ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｅｘｔｅｎｓｉｖｅａｎｄｒａｐｉｄｄｅｖｅｌｏｐｍｅｎｔｏｆｔｈｅｃｈｅｍｉｓｔｒｙｏｆｄｉｎｕｃｌｅａｒｔｒａｎｓｉｔｉｏｎｍｅｔａｌｃｏｍｐｌｅｘｅｓｂｒｉｄｇｅｄｂｙｕｎｓａｔｕｒａｔｅｄｈｙｄｒｏｃａｒｂｏｎｓ...

关键词： cobalt molybdenum diyne compounds crystal structure cluster

Enantioselective Hydrogenation of α,β-Unsaturated Cyclic Ketones by Double Asymmetric Induction Preparation of (R)-Muscone

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chinese chemical Letters 1997年第6期8卷 477-478页

作者： Bao Han XIE shi Jie LU Hong Xiang FU Lan Yong GAO (state key laboratory for Oxo srnthesis and selective Oxidation lanzhou institute of chemical physics. chinese academy of sciences, lanzhou 730000) state key Lab. Oxo synthesis/s.O. Lanzhou Inst. of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

By ketal formation with chiral glycols like methyl or ethyl ester of tartaric acid,hydrogenation of ketals from the correspondingα,β-unsaturated 15-membered cyclic ketone produces (R)-muscone in good chemical and op... 详细信息

关键词： Unsaturated Cyclic Ketones by Double Asymmetric Induction Preparation of Muscone