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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 {2. for Oxo Srnthesis and Selective Oxidation lanzhou institute of chemical physics. chinese academy of sciences, lanzhou 730000) chinese ACAD SCI LANZHOU INST CHEM PHYSSTATE KEY LAB OXO SYNTH & SELECT OXIDATLANZHOU 730000PEOPLES R 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

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 {12.,china 1. academy of Opto-Electronics Chinese Academy of Sciences Beijing 100190 China2. Graduate University of Chinese Academy of Sciences Beijing 100049 China3. Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

A solid lubricating material exposure experiment in space is one of the missions during the seventh manned spaceflight of china,and the {2. 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

Hydrocarboxylation of Styrene in Water-Soluble Catalyst System Pd(OAc)2.TPPTSH-HOAc-H2.

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分子催化 1997年第2期 2-3页

作者： XIE Baohan KOU Yuan * YINGYuanqi (state key {2. for Oxo Synthesis and Selective Qxidation lanzhou institute of chemical physics The chinese academy of sciences lanzhou 730000)

ＨｙｄｒｏｃａｒｂｏｘｙｌａｔｉｏｎｏｆＳｔｙｒｅｎｅｉｎＷａｔｅｒ┐ＳｏｌｕｂｌｅＣａｔａｌｙｓｔＳｙｓｔｅｍＰｄ（ＯＡｃ）２┐ＴＰＰＴＳＨ┐ＨＯＡｃ┐Ｈ２ＯＸＩＥＢａｏｈａｎＫＯＵＹｕａｎ＊ＹＩＮＧＹｕａｎｑｉ（... 详细信息

ＨｙｄｒｏｃａｒｂｏｘｙｌａｔｉｏｎｏｆＳｔｙｒｅｎｅｉｎＷａｔｅｒ┐ＳｏｌｕｂｌｅＣａｔａｌｙｓｔＳｙｓｔｅｍＰｄ（ＯＡｃ）２┐ＴＰＰＴＳＨ┐ＨＯＡｃ┐Ｈ２ＯＸＩＥＢａｏｈａｎＫＯＵＹｕａｎ＊ＹＩＮＧＹｕａｎｑｉ（ＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒ...

关键词： Hydrocarboxylation Styrene Water soluble catalyst Palladium acetate

Progress and development in thermodynamic theory of friction and wear

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Science china(Technological sciences) 2009年第4期52卷 844-849页

作者： DAI ZhenDong1 & XUE QunJi2.1 institute of Bio-inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 2.0016, china 2.{2. key laboratory of solid lubrication, chinese academy of sciences, lanzhou 710000, china 1. institute of Bio-inspired Structure and Surface Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China 2. state key laboratory of solid lubrication Chinese Academy of Sciences Lanzhou 710000 China

Tribology theory lags well behind engineering needs because of those complex and multi-dimensional characteristics associated with friction and wear. The mechanism of friction is reviewed and discussed from a static thermodynamics perspective; research methods on the process of friction and wear and thermodynamic studies within the field of tribology are also reviewed. We propose that entropy can be a critical parameter in describing the evolution of friction and wear, and the entropy balance equation could be considered as a fundamental cornerstone for a systematic tribology theory. Applications of irreversible thermodynamic theory of tribology to various fields are reviewed.

关键词： friction and wear irreversible thermodynamics entropy generation multi-factor coupling

Studies on the Reaction Mechanism of CO_2.Reforming of Methane over Co/γ-Al_2._3 Catalyst

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chinese chemical Letters 1997年第2期8卷 121-124页

作者： Yong LU Chang Chun YU Jin Zhen XUE Yu LIU Xue Jia DING and Shi Kong SHEN(state key {2. of Oxo Synthesis and Selective Oxidation,lanzhou institute of chemical physics,chinese academy of sciences. lanzhou 730000) chinese ACAD SCI LANZHOU INST CHEM PHYSSTATE KEY LAB OXO SYNTH & SELECT OXIDATLANZHOU 730000PEOPLES R CHINA

TPPR and XPS characterizations were combined to study the reaction mechanism of CO2.eforming of methane to syngas over Co/γ-Al2.3 catalysts. CH4 shows a tendency to form surface carbons by deep dissociation at high temperatures. CO2.dissociation reaction also occurs at >673K. It is believed that carbide carbons are active species to generate CO by rcacting with o atoms dissociated from CO2. In the reaction,Co(0) particles are responsible for dissociating CH4 to form active C. abstracting an O atom from CO2.molecule, and transferring O atom to C to form CO.

关键词： over CO Al2.3 Catalyst Studies on the Reaction Mechanism of CO2.Reforming of Methane over Co

Hydrogenation of CO2. over Alumina-Modified

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分子催化 1997年第4期 4-5页

作者： REN Xu KOU Yuan 1) WANG Hongli (state key {2. for Oxo Synthesis and Selective Oxidation lanzhou institute of chemical physics The chinese academy of sciences lanzhou 730000)

ＨｙｄｒｏｇｅｎａｔｉｏｎｏｆＣＯ２ｏｖｅｒＡｌｕｍｉｎａＭｏｄｉｆｉｅｄＺｉｒｃｏｎｉａＳｕｐｐｏｒｔｅｄＩｒｏｎＣａｔａｌｙｓｔＲＥＮＸｕＫＯＵＹｕａｎ１）ＷＡＮＧＨｏｎｇｌｉ（ＳｔａｔｅＫｅｙＬａｂｏｒａｔ... 详细信息

ＨｙｄｒｏｇｅｎａｔｉｏｎｏｆＣＯ２ｏｖｅｒＡｌｕｍｉｎａＭｏｄｉｆｉｅｄＺｉｒｃｏｎｉａＳｕｐｐｏｒｔｅｄＩｒｏｎＣａｔａｌｙｓｔＲＥＮＸｕＫＯＵＹｕａｎ１）ＷＡＮＧＨｏｎｇｌｉ（ＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｆｏｒＯｘｏＳｙｎｔｈｅｓｉ...

关键词： Iron catalyst Zirconia Hydrogenation of CO 2 XRD EXAFS

The thermal stability and tribological properties of cadmium dithiomolybdenate at evaluated temperature

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Science china Mathematics 2001年第S1期44卷 163-170页

作者： LIU Weimin FENG Dapeng state key {2. of solid lubrication, lanzhou institute of chemical physics, chinese academy of sciences, lanzhou 730000, china chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China

CdMoO_2._2.H_2. was synthesized in laboratory. Its thermal stability was investigated by means of Th ermog ravimetric analysis (TGA), and its tribological characteristics at temperatures up to 500℃ were examined by sliding a Sialon ceramic and GCr15(AIS152.00) steel ball against a W18Cr4V(AISI T1) steel disc on a high temperature ball-on-disc tribometer. The morphologies of and the elemental distributions in the worn surfaces of the ceramic and GCr15 ball were observed and determined by scanning electron microscopy (SEM) equipped with energy dispersion spec- trometry (EDS). The chemical {2.s of some typical elements in the worn surfaces of the ceramic ball and steel ball were explored with X-ray photoelectron spectroscopy (XPS). As the results, CdMoO_2._2.showed good lubricity for Sialon ceramic/W18Cr4V steel and GCr15/W18Cr4Vpair from room temperature to 400℃. The XPS analytical results indicate that CdMoO_2._2.experienced tribochemical reactions during the friction process at 300℃, thereby generating S and Mo of higher valence for both pair. While for GCr15/W18Cr4V pair, produced MoS_2. SEM observations of the worn surfaces of the Sialon ceramic and GCr15 ball show that a surface protective film composed of the lubricants and their decomposed products was formed thereon, which contributes to keep the sliding surfaces off contact and abate the adhesion and scuffing on the lubricated surfaces, therefore to decrease the friction coefficients.

关键词： cadmium dithiomolybdenate high temperature tribochemical reaction transfer film

Photoresponsive organogel and organized nanostructures of cholesterol imide derivatives with azobenzene substituent groups

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Progress in Natural Science:Materials International 2012年第1期22卷 64-70页

作者： Tifeng Jiao a,b,c,Yujin Wang a,Fengqing Gao a,Jingxin Zhou a,Faming Gao a a Hebei key laboratory of Applied Chemistry,College of Environmental and {2. Engineering,Yanshan University,Qinhuangdao 066004,china b College of Chemistry & Materials Engineering,Wenzhou University,Wenzhou 32.02.,china c state key laboratory of solid lubrication,lanzhou institute of {2. physics,chinese academy of sciences,lanzhou 730000,china [a] Hebei key laboratory of Applied Chemistry College of Environmental and Chemical Engineering Yanshan University Qinhuangdao 066004 China [b] College of Chemistry & Materials Engineering Wenzhou University Wenzhou 325027 China [c] state key {2. of solid lubrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China

Two new cholesterol imide derivatives with azobenzene substituent groups have been *** compounds possess headgroups of hydrogen or methyl units,*** gelation test revealed that a subtle change in the headgroup of azobenzene segment produced a dramatic change in the gelation behavior of both *** compound with headgroups of hydrogen units only gelated N,N-Dimethylformamide(DMF),while the other compound with headgroups of methyl units cannot gelate any solvent tested *** DMF gel and solution of the gelator,the reversible photoisomerization transitions by irradiation with ultraviolet(UV) and visible light are investigated by UV-vis absorption spectra,Fourier transform infrared spectrometer,scanning electron microscope,atomic force microscope,and X-ray diffraction *** UV irradiation of the gel,trans-cis photoisomerization of the azobenzene groups occurs,the change in molecular polarity leads to the breaking of van der Waals interactions,resulting in the gel-sol *** gel can be recovered by the reverse cis-trans photoisomerization after exposure to visible *** and spectral studies reveal that the gelator molecules selfassemble into one-dimensional fibers,which further crossed-linked to form regular *** results afford useful information for the development of new versatile low molecular mass gelators and soft matter.

关键词： Organogel Cholesterol Azobenzene Photoisomerization Soft material

Fabrication of Transparent Superhydrophilic TiO_2.Nanofilm without UV-irradiation

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稀有金属材料与工程 2012年第S1期41卷 263-267页

作者： Du Wen1,2.Ye Yinping1,Li Hongxuan1,Zhao Fei1,2.Ji Li1,Quan Weilong1,2.Chen Jianmin1,Zhou Huidi1 1 state key {2. of solid lubrication,lanzhou institute of chemical physics,chinese academy of sciences,lanzhou 730000,china 2.Graduate University of chinese academy of Science,Beijing 100049,china chinese Acad Sci Lanzhou Inst Chem Phys State Key Lab Solid Lubricat Lanzhou 730000 Peoples R China chinese Acad Sci Grad Univ Beijing 100049 Peoples R China

A transparent phase-pure anatase TiO2.nanofilm was prepared through magnetron sputtering method,and a subsequent annealing treatment awarded it the superhydrophilic *** make clear the mechanism of the heat-induced superhydrophilicity,the chemical composition and surface morphology of the film were investigated in detail and compared before and after the annealing treatment mainly by field emission scanning electron microscopy(FESEM),X-ray diffraction method(XRD),Raman spectroscopy,and X-ray photoelectron spectroscope(XPS).The results suggest that the probable mechanism is in accordance with the UV-induced mechanism,where the heat-induced surface oxygen vacancies and hydroxyl radicals play important roles for achieving the superhydrophilicity.

关键词： superhydrophilicity transparent TiO2 nanofilms magnetron sputtering annealing treatment