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The synthesis and crystal structure of metal complexes S-alkyl-N-(ferrocenyl-1-methyl-methylidene)-dithiocarbazate and the study on their quenching the luminescence ofruthenium(bipyridine)_~3(2.)

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Chinese Journal of Chemistry 1994年第4期12卷 321-327页

作者： DUAN, Chun-Ying XIA, Xu-Bing ZHU, Long-Gen YOU, Xiao-Zeng YANG, Yao WANG, Hua-QinCoordination Chemistry Institute, nanjing university The state {2. laboratory of Coordination Chemistry, nanjing, Jiangsu 2.0008, china Coordination Chemistry Institute Nanjing University The state key {2. of Coordination Chemistry Nanjing Jiangsu 210008 China

The cobalt, nickel, copper, zinc and cadmium complexes of S-methyl-N-(ferrocenyl-l-methyl-methylidene)-dithiocarbazate (H-LSM) and S-benzyl-N-(ferrocenyl-l-methyl-methylidene)-dithiocarbazate (H-LSB) were synthesized and the crystal structure of Cd[Fe-C(CH3) = NNCSS. (CH3)]2.was solved by X-ray diffraction. The crystal is in the orthorhombic system with space group Pbca, cell parameters a=19.741(3), b=19.92.(5), c=15.452.4) A, and the final factors of R=0.032. The study on quenching the luminescence of Ru(bpy)3 by those complexes showed that bimolecular quenching constants obtained from the Stern-Vohner constant and the excited-state lifetime were related to the redox potential of the quencher. Linear relationship is shown in the plot of logkq vs. E1/2.Q+/Q). The main factor which influences the quenching rate constant and the redox potential is the coordinating ability of the metal in the complex.

关键词： Cadmium complex quenching constant electron transfer.

Microstructure of Cu_(60)Zr_(2.)Ti_(2.) bulk metallic glass rolled at different strain rates

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Science china(Physics,Mechanics & Astronomy) 2008年第4期51卷 394-399页

作者： LI JinFu,CAO QingPing & ZHOU YaoHe state key {2. of metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong university,Shanghai 2.0030,china state key {2. of metal Matrix Composites School of Materials Science and Engineering Shanghai Jiao Tong University Shanghai China

The structural evolution of Cu60Zr2.Ti2. bulk metallic glass during rolling at different strain rates and cryogenic temperature was investigated by X-ray diffraction (XRD),differential scanning calorimetry (DSC) and high-resolution transmission electron microscopy (HRTEM). It is revealed that the deformation-induced transformation is strongly dependent on the strain rate. At the lowest experimental strain rate of 1.0×10-4 s-1,no phase transformation occurs until the highest deformation degree reaches 95%. In a strain rate range of 5.0×10-4-5.0×10-2.s-1,phase separation oc-curs in a high deformation degree. As the strain rate reaches 5.0×10-1 s-1,phase separation and nanocrystallization concur. The critical deformation degree for oc-currence of phase transformation decreases with the strain rate increasing.

关键词： metallic glass inhomogeneous deformation strain rate phase separation nanocrystallization

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 2.1008, 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 221008 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.

Effect of slow monomer addition on molecular parameters of hyperbranched polymers synthesized in the presence of multifunctional core molecules

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Science china Chemistry 2010年第4期53卷 891-897页

作者： ZHOU ZhiPing1, Jia ZhengWei1 & YAN DeYue2.1School of Materials Science and Engineering, Jiangsu university, Zhenjiang 2.2.13, china 2.2. key laboratory of metal Matrix Composites, Shanghai Jiao Tong university, Shanghai 2.02.0, china School of Materials Science and Engineering Jiangsu University Zhenjiang China state key {2. of metal Matrix Composites Shanghai Jiao Tong University Shanghai China

This study develops the kinetics for the slow monomer addition technique in the synthesis of hyperbranched polymers. Taking the conversion of monomer (x) as a variable, we derived the analytic expressions of molecular size distribution function, average degree of polymerization, polydispersity index and degree of branching. These expressions are not only amenable to the polymerization with high monomer conversion, but also appropriate to describe the whole polymerization process. Comparison with the one-pot polymerization indicates that the slow monomer addition technique improves the molecular weight distribution and increases the degree of branching for the products obtained.

关键词： hyperbranched polymer kinetics molecular weight distribution polydispersity degree of branching

BEHAVIOUR OF INITIATION AND GROWTH OF SHORT FATIGUE CRACKS

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Acta metallurgica Sinica(English Letters) 1996年第1期9卷 65-70页

作者： WU Zhixue XU Hao(Institute of Mechanical Engineering,Northeastern university,Shenyang 110006,china)(Fushun Petroleum institute,Fushun 113001.china).(state key laboratory for Fatigue and Fracture of Materials,Institute of metal research,Chinese Academy of Northeastern Univ Shenyang China

Rotary bending fatigue tests were carried out using smooth specimens of a medium-carbon steel with two different grain *** process of early crack development was observed by the replica method,and the effects of grain size and microstructure on short crack development were *** was shown that the initiation process of fatigue cracks is that the damaged region is intensified gradually,and the growth of short cracks relates to the coalescence of *** grain size and microstructure have a great influence upon the initiation and growth of short cracks.A reasonable definition was given in relation to short fatigue crack initiation and propagation.

关键词： fatigue damage crack initiation crack propagation microstructure

Sediment pollution and its effect on fish through food chain in the Yangtze River

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International Journal of Sediment research 2008年第4期23卷 338-347页

作者： Yujun YI 1,Zhaoyin WANG 2.Kang ZHANG 3,Guoan YU 4,and Xuehua DUAN 51 Dr.,Lecturer,state key {2. of Hydroscience,School of Environment,Beijing Normal university,Beijing 100875,china2.Prof.,state key {2. of Hydroscience and Engineering,Tsinghua university,Beijing 100084,china 3 Ph.D.,state key {2. of Hydroscience and Engineering,Tsinghua university,Beijing 100084,china 4 Ph.D.,state key {2. of Hydroscience and Engineering,Tsinghua university,Beijing 100084,china 5 Ph.D.,state key {2. of Hydroscience and Engineering,Tsinghua university,Beijing,100084,china Dr. Lecturer State Key Laboratory of Hydroscience School of Environment Beijing Normal University Beijing 100875 China Prof. State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China Ph. D. State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China Ph. D. State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing 100084 China

Suspended sediment adsorbs pollutants from flowing water in rivers and deposits onto the bed. However, the pollutants accumulated in the river bed sediment may affect the bio-community through food chain for a long period of time. To study the problem the concentration of heavy metals (Cr, Cd, Hg, Cu, Fe, Zn, Pb and As) in water, sediment, and fish/invertebrate were investigated in the middle and lower reaches of the Yangtze River during 2.06-2.07. The concentrations of heavy metals were 100-10,000 times higher in the sediment than in the water. Benthic invertebrates had relatively high concentrations of heavy metals in their tissues due to their proximity to contaminated sediments. Benthic invertivore fish had moderately high concentrations of heavy metals whereas phytoplanktivore fish, such as the silver carp, accumulated the lowest concentration of heavy metals. The concentrations of Cu, Zn, and Fe were higher than Hg, Pb, Cd, Cr, and As in the tissue samples. The concentration of heavy metals was lower in the river sediments than in the lake sediments. Conversely, the concentration of heavy metals was higher in river water than in lake water. While a pollution event into a water body is often transitory, the effects of the pollutants may be long-lived due to their tendency to be absorbed in the sediments and then released into the food chain. The heavy metals were concentrated in the following order: bottom material > demersal fish and benthic fauna > middle-lower layer fish > upper-middle layer fish > water.

关键词： Sediment pollution Heavy metal Fish Invertebrate Yangtze River

Antitumor and Nuclease Activities of metal Complexes

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Antitumor and Nuclease Activities of Metal Complexes

Study on blister of the coating on solid cantilevers of hydraulic supports for coal mining

第四届全国化学生物学学术会议暨国际化学与生物/医学交叉研讨会

作者： Zijian Guo state key {2. of Coordination Chemistry, Department of Chemistry, nanjing university, nanjing 210093. china

The side effects of the current clinic drugs have stimulated the research on the novel platinum-based antitumor complexes. Previous studies have shown that the introduction of bulky ligands in Pt(II) can potentiate the antitumor activity of Pt(II) complexes with trans-geometry. Several possibilities may be related

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Science china(Technological Sciences) 2010年第12期53卷 3183-3188页

作者： MENG GuoZhe1, FU JinLiang2. SUN FeiLong1, SHAO YaWei1, ZHANG Tao1 & WANG FuHui1, 3 1 Corrosion and Protection laboratory, key laboratory of Superlight Materials and Surface Technology (Harbin Engineering university), Ministry of Education, Harbin 150001, china 2.Technology Center of Zhengzhou Coal Mining Machinery Group Co. Ltd., Zhengzhou 100049, china 3 state key laboratory for Corrosion and Protection, Institute of metal research, Chinese Academy of Sciences, Shenyang 110016, china Corrosion and Protection laboratory Key Laboratory of Superlight Materials and Surface Technology (Harbin Engineering University) Ministry of Education Technology Center of Zhengzhou Coal Mining Machinery Group Co. Ltd.

In this work, blister of the Cu-Sn plus Cr coating on solid cantilevers of hydraulic supports for coal mining was investigated by hydrogen-charging, Devanathan-Stachurski method and electrochemical impedance spectroscopy (EIS) measurement. It was found that the permeation hydrogen during the pickling process and the electroplating process was responsible for the blisters. The residual tensile stress due to the machining process would increase the permeation hydrogen amount during pickling and electroplating processes.

关键词： hydrogen blister hydrogen permeation EIS sub-surface hydrogen concentration

Effect of TRT process on GFA,mechanical properties and microstructure of Zr-based bulk metallic glass

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Progress in Natural Science:Materials International 2011年第1期21卷 53-58页

作者： Guang-qiao LIU~1,Sheng-zhong KOU~(1,2.,Chun-yan LI~1,Yan-chun ZHAO~1,Hong-li SUO~2.1.state key {2. of Gansu Advanced Non-ferrous metal Materials, Lanzhou university of Technology,Lanzhou 730050,china 2.The key {2. of Advanced Functional Materials(Ministry of Education), Beijing university of Technology,Beijing 10002.,china state key {2. of Gansu Advanced Non-ferrous metal Materials Lanzhou University of Technology The key laboratory of Advanced Functional Materials (Ministry of Education Beijing University of Technology

Series of rod samples of Zr55Al10Ni5Cu30 alloy were prepared by magnetic suspend melting and copper mold suction casting *** effect of thermal rate treatment（TRT） process on glass forming ability（GFA）,mechanical properties and microstructure of Zr-based bulk metallic glass were *** shows that GAF,mechanical properties and microstructure of as-cast Zr55Al10Ni5Cu30 BMGs alloy to a large extent is related to TRT *** and thermal stability of as-cast Zr55Al10Ni5Cu30 alloy increase when overheating temperature *** liquid region△Txand parameterγincrease from 73 K to 89 K,from 0.413 to 0.417,respectively,when casting voltage increases from 7 kV to 10 *** a threshold overheating temperature is found for the fully amorphous structure,below which it may have an intersection with the crystallization *** is found that the compressive strength increases and the compressive plasticity slightly decreases when overheating temperature ***,the compressive strength and the compressive plasticity simultaneously increase to 1.91 MPa and 2.when casting voltage increases to 10 kV.

关键词： bulk metallic glass glass forming ability(GFA) mechanical properties thermal rate treatment(TRT) process microstructure