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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

Study on the Atomization Process of Lithium in Electrothermal Atomic Absorption Spectrometry

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Chemical Research in Chinese Universities 1989年第1期5卷 26-33页

作者： Yan Xiuping(Department of chemistry, Taizhou Teachers College, Taizhou)Lin Tiezheng(Dalian institute of Chemical physics, Academia Sinica)

A new method for determining the kinetic order and activation energy for atom formation in electrothermal atomic absorption spec-trometry is proposed. The assumption of first order kinetics for atom formation and the steady-state approximation which appeared in the previous models is avoided in the proposed method. The kinetic parameters for atom formation of Li have been obtained, and the effect of the amount of analysed sample, ashing temperature, atomization temperature, heating rate, gas flow and tube surface on the atomization of Li has also been investigated.

关键词： Atomic absorption Atomization peocess Kinetic parameters

Preparation and Biological Distribution of New BATOs

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Chinese Chemical Letters 1997年第1期8卷 81-82页

作者： Jing Tao WANG Xiang Yun WANG Yuan Fang LIU(Department of Technical physics- Peking University, Beijing 100871)(The current address is: institute of Photographic chemistry, Academia Sinica, Bejing 100101) BEIJING UNIV DEPT TECH PHYSBEIJING 100871PEOPLES R CHINA

Seven new boronic acid adducts of technetium(III) tris(dioxime) (BATO) were prepared and the biodistribution in mice of Tc-99m labelled BATOs were determined. The uptake of 1.62%1D in mice heart at 2 min after injection of (TcCl)-Tc-99m(MeCDO)(3)BMe indicates high myocardial extraction of this BATO. (TcCl)-Tc-99m(MeCDO)(3)BMe shows promise as a myocardial perfusion imaging agent.

关键词： DMG Preparation and Biological Distribution of New BATOs

SYNTHESIS AND CRYSTALLIZATION BEHAVIOR OF POLY(ETHER ETHER KETONE ETHER KETONE)(PEEKEK)

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Chinese Journal of Polymer Science 2000年第2期18卷 129-132页

作者： Zhao-bin Qiu Zhi-shen Mo Ying-ning Yu Hong-fang Zhang Xian-hong Wang Polymer physics Laboratory, Changchun institute of Applied chemistry, Chinese Academy of Sciences, Changchun 130022, China Chinese Acad Sci Changchun Inst Appl Chem Polymer Phys Lab Changchun 130022 Peoples R China

In this paper, the synthesis and crystallization behavior of poly(ether ether ketone ether ketone) (PEEKEK) are reported. PEEKEK was prepared from 4,4'-bis(p-fluorobenzoyl) diphenyl ether (4,4'-FBDE) and hydroquinone along the nucleophilic substitution route. The thermal properties were investigated by using DSC and TGA. The crystallization behavior of PEEKEK under several conditions, i.e., crystallization from the molten state (melt crystallization), crystallization from a quenched sample (cold crystallization) and crystallization induced by exposing glassy sample to methylene chloride (solvent-induced crystallization) has also been investigated. The results show that crystallization of PEEKEK could be induced by the above methods, and no polymorphism was found. The differences in the crystallization of PEEKEK induced by the above methods are seen in their degree of crystallinity.

关键词： poly(aryl ether ketone)s synthesis crystallization

COALESCENCE INDUCED GRADIENT MORPHOLOGY NEAR A WALL IN PHASE SEPARATED POLYMER BLENDS DURING QUIESCENT ANNEALING

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Chinese Journal of Polymer Science 2002年第6期20卷 543-550页

作者： Wei Yu Chi-xing Zhou De-lu Zhao Department of Polymer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 China State Key Laboratory of Polymer physics and chemistry, institute of chemistry, Chinese Academy of Sciences Beijing 100080, China Shanghai Jiao Tong Univ Dept Polymer Sci & Engn Shanghai 200240 Peoples R China Chinese Acad Sci Inst Chem State Key Lab Polymer Phys & Chem Beijing 100080 Peoples R China

A fast coalescence mechanism is proposed to account for the wall effect on the formation of gradient morphology in phase separated polymer blends during quiescent annealing. The existence of solid wall with high polarity is believed to change the potential field around the dispersed particles near the wall. This additional potential interaction between the solid wall and the dispersed particles causes faster coalescence of the dispersed particles near the wall than in the bulk. The gradient phase morphology thus formed can be predicted by combining the wall-particle interaction and the touch-coalescence mechanism. The effect of interfacial tension on the gradient morphology is also discussed.

关键词： gradient morphology wall effect coalescence polymer blends interfacial tension

Determination of High Pressure Phase Diagrams of the Ternary Alloy System

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Chemical Research in Chinese Universities 1995年第4期11卷 312-315页

作者： SONG Li-zhu YANG Hua and ZHAO Mu-yu(Department of chemistry,Jilin University,Changchun, 130023)SHEN Zhong-yi LIU Yong(institute of physics,Academia Sinica,Beijing, 100080) JILIN UNIV DEPT CHEMCHANGCHUN 130023PEOPLES R CHINA ACAD SINICA INST PHYSBEIJING 100080PEOPLES R CHINA

everal vertical sections of the phase diagram of Cd-Sn-Zn system with a constant mole fraction X_(cd)=0.2 were determined by means of differential thermal anal- ysis(DTA)at high pres:ures 0.0,0.5,1.5,and 2. 0 GPa respectively. The eutectic temperature of the system increases by about 50K from atmospheric pressure to the high pressure 2.0 GPa,but the ternary eutectic composition changes slightly with the pressure chnge.

关键词： Alloys High pressure Phase diagrams.

Influence of vanadium doping on the behavior of YBa_2Cu_3O_7-y

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Chinese Journal of chemistry 1994年第5期12卷 419-424页

作者： MENG, Jian REN, Yu-Fang LI, Xiao-GuangLaboratory of Rare Earth chemistry and physics, Changchun institute of Applied chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, ChinaPopov, V.V. Repin, S.M. Smirnov, LA. loffe Physicotechnical institute, Russian Academy of Sciences, Saint Petersburg, Russia 1Laboratory of Rare Earth chemistry and physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China2Ioffe Physicotechnical Institute Russian Academy of Sciences Saint Petersburg Russia

YBa2Cu3-xVxO7-y(x=0, 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6) superconductors have been prepared. X-ray diffraction shows that the system remains orthorhombic for all compositions studied, but for x > 0.4 V2O5 was detected as an impurity phase. Substitution of V5+ for Cu2+ occurs in the Cu(2) sites on the Cu(2)-O planes. The introduction of the high valence element, vanadium, produces the extra free-electrons. These electrons recombine with the positive carrier of the system. It makes depression of the mobility and the Hall number of YBa2Cu3-xVxO7-v and also results in a depression of TC.

关键词： YBa2Cu3O7-y high-Tc superconductor vanadium doping impurity effect.

Valence Change and Luminescence of Divalent Samarium in Strontium Borates

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Journal of Materials Science & Technology 1999年第5期15卷 449-452页

作者： Qinghua ZENG Zhiwu PEI Shubing WANG and Qiang SU(Laboratory of Rare Earth chemistry and physics, Changchun institute of Applied chemistry, Chinese Academy of Sciences, Changchun 130022, China) To whom correspondence should be addressedE-mail: zengqh@ns. Laboratory of Rare Earth chemistry and physics Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Laboratory of Excited State Processes Chinese Academy of Sciences Changchun 130022 China

The valence change of samarium from trivalent to divalent state in strontium borates (SrB6O10)prepared in air was observed. The high resolution spectra of Sm2+ in matrix were studied between 10 K and 300 K. The results showed that three crystallographic sites for Sm2+ were available in the host. Energy transfer among these sites was possible. The vibronic transition of 5D0-7F0 of Sm2+ was studied at room temperature and the Huang-Rhys factor S was calculated. Due to the thermal population, 5D1 -7F0 transition at room temperature was observed

关键词： FJ cm nm

Studies on the Coordination of Pr(Ⅲ) with Adrenaline by Potentiometry and Absorption Spectroscopy

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Chinese Chemical Letters 1999年第8期10卷 677-678页

作者： Feng GAO Jing Fen HAN Zhi Jian WU Yue WANG Kui Yue YANG Chun Ji NIU Jia Zuan NI (Laboratory of Rare Earth chemistry and physics. Changchun institute of Applied chemistry. Chinese Academy of Sciences, Changchun 130022) Lab. of Rare Earth Chem. and physics Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

The stability constant for complex of Pr(Ⅲ) with adrenaline has been determined by potentiometric titration under biological conditions (37℃ and 0.15mol/L NaCl). The absorption spectra of the Pr(Ⅲ)-adrenaline system exhibit characteristic bands of Pr(Ⅲ) at lower pH values. However, the charge transfer band which is due to the coordination of Pr(Ⅲ) with adrenaline has been observed at higher pH values.

关键词： Praseodymium adrenaline potentiometry spectroscopy