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INFLUENCE OF DIALKYLZINC IN RARE-EARTH TERNARY CATALYST ONTHE COPOLYMERIZATION OF CARBON DIOXIDE AND PROPYLENE OXIDE

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chinese Journal of Polymer Science 2005年第6期23卷 671-674页

作者： Dong Xie Xian-hong Wang Xiao-jiang Zhao and Fo-song Wang Polymer Material Engineering Lab,changchun institute of applied chemistry,Graduate School of chinese academy of sciences,changchun 130022,china Polymer Material Engineering Lab Changchun Institute of Applied Chemistry Graduate School of Chinese Academy of Sciences Changchun 130022 China

Rare-earth ternary catalysts Y（CCl3COO）3-ZnR2-glycerin were prepared for the copolymerization of carbon dioxide and propylene oxide （PO）, where dialkylzincs （ZnR2） were diethylzinc, di（n-propyl）zinc, di（n-butyl）zinc, di（i-propyl）zinc, di（i-butyl）zinc, di（s-butyl）zinc,respectively. The Y（CCl3COO）3-ZnR2-glycerin catalysts displayed the highest catalytic activity at the molar ratio of Y（CCl3COO）3：ZnR2：glycerin = 1：20：10. In the same copolymerization condition, catalysts containing dialkylzincs with branched alkyl group showed lower catalytic activity than that with primary alkyl group. For those catalysts including dialkylzincs with primary alkyl group, their catalytic activity decreases with increasing number of carbon atom in the alkyl group with the following sequence： Y（CCl3COO）3-ZnEt2-glycerin 〉 Y（CCl3COO）3-Zn（n- Pr）2-glycerin〉Y（CCl3COO）3-Zn（n-Bu）2-glycerin. However, the alkyl group in the dialkylzinc does not influence the insertion of PO into the propagation chain end.

关键词： Carbon dioxide Propylene oxide Copolymerization Dialkylzinc

Preparation, Characterization and Luminescent Properties of MCM-41 Type Materials Impregnated with Rare Earth Complex

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Journal of Materials Science & Technology 2001年第3期17卷 293-298页

作者： Lianshe FU and Hongjie ZHANG Key Laboratory of Rare Earth chemistry and Physics, changchun institute of applied chemistry, chinese academy of sciences, changchun 130022, china Philippe Boutinaud Laboratoire des Materiaux Inorganiques, UMR 6002, Universite UMR 6002 Univ. Blaise-Pascal et ENSCCF F-63177 Aubiére Cedex France

Hybrid materials incorporating Eu-(TTA)(3). 2H(2)O (7hereafter designated as Eu-TTA, with TTA: thenoyltrifluoroacetone) in unmodified or modified MCM-41 by 3-aminopropyl-triethoxysilane (APTES) were prepared by impregnation method. The obtained materials were characterized using X-ray diffraction (XRD), IR and diffuse reflectance spectroscopy and luminescence spectra. All the hybrid samples exhibited the characteristic emission bands of EU3+ under UV light excitation at room temperature, and the excitation spectra showed significant blue-shifts compared to the pure rare-earth complex. Although the red emission intensity in the modified hybrid was almost the half of the red emission intensity in the pure Eu-TTA complex at room temperature, the hybrid showed a much higher thermal stability due to the shielding character of the MCM-41 host.

关键词： MCM Characterization and Luminescent Properties of MCM-41 Type Materials Impregnated with Rare Earth Complex Preparation

Poly-N-benzylaniline prepared in perchloric acid——a new soluble semiconducting polymer

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chinese Journal of chemistry 1992年第4期10卷 295-303页

作者： LI,Zhuang DONG,Shao-Jun Laboratory of Electroanalytical chemistry,changchun institute of applied chemistry,chinese academy of sciences,changchun,Jilin 130022 Laboratory of Electroanalytical chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022

Chemical or electrochemical oxidation of N-benzylaniline in perehloric acid solution yields a highly colored polymer——poly-N-benzylaniline (PBAn).The polymer has good solubility in a num- ber of organic solvents in either acid or base *** room temperature,conductivity measurements on pressed pellets of the acid form PBAn give a conductivity of 9.3×10^(-6) S·cm^(-1).The soluble polymer was analyzed using a variety of common experimental techniques including UV-vis,IR,NMR,ESR spectroscopy,elemental analysis and electrochemieal *** experimental results showed that PBAn has a structure similar to polyaniline with the elimination of some benzyl groups.

关键词： Poly-N-benzylaniline prepared in perchloric acid acid a new soluble semiconducting polymer

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 中科院长春应用化学所高分子物理及化学国家重点实验室吉林长春

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

Intensity Exaggeration of Endohedral Metallofullerenes in Laser Desorption-Ionization Time-of-Flight Mass Spectrometry

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chinese Chemical Letters 1998年第8期9卷 761-764页

作者： Da Yong SUN Wen Guo XU and Shu Ying LIU(The No. 9 Laboratory, changchun institute of applied chemistry,chinese academy of sciences, changchun 130022) No. 9 Laboratory Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun 13022 China

The laser-desorption-ionization time-of-flight mass spectrometry and desorption-electron-ionization mass spectrometry were employed for the characterization of metallofullerenes extract. it was found that the relative intensities of metallofullerenes in this positive-ion, negative-ion LD-TOF MS and DEI MS were much different. This phenomenon should have relationship with the peculiar ionization energies and electron affinities of metallofullerenes.

关键词： metallofullerenes LD-TOF MS

Synthesis of a New Aryl Ether Ketone Polymer

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chinese Chemical Letters 1998年第10期9卷 893-894页

作者： Zhao Bin QIU Zhi Shen MO Hong Fang ZHANG (Polymer Physics Laboratory, changchun institute of applied chemistry, chinese academy of sciences, changchun 130022) Polymer Physics Laboratory Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

The synthesis of a new aryl ether ketone polymer with an advantageous ratio of glass transition temperature to melting temperature is reported.

关键词： poly(aryl ether ketone) synthesis

NEW OPTICALLY ACTIVE AROMATIC POLYIMIDES Ⅱ: SYNTHESIS AND PROPERTIES OF OPTICALLY ACTIVE AROMATIC POLYIMIDE BASED ON (R)-(+)-2, 2′-BIS (2-TRIFLUORO-4-AMINOPHENOXY)-1, 1′-BINAPHTHYL

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chinese Journal of Polymer Science 1999年第1期17卷 87-90页

作者： Qi-ding Mi Yu Ma Lian-xun Gao Meng-xian Ding changchun institute of applied chemistry, chinese academy of sciences changchun 130022, china Department of chemistry, Peking University, Beijing 100871 中科院长春应用化学所吉林长春 130022 中科院长春应用化学所吉林长春

Optically active (R)-(+)-2, 2' -bis(2 -trifluoro-4 -aminophenoxy)- 1, 1' -binaphthyl was prepared from1, 1'-bi-2-naphthol. The optically active aromatic polyimide was also successfully synthesized. This newpolymer has good solubility, thermal stability etc. Its specific rotation was found to be +174°, and itschiroptical property was also studied.

关键词： Optical activity 1, 1′-Bi-2-naphthol, Polyimide

The electrooxidation behavior of bilirubin in DMF and DMF + H_2O mixed solvent

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chinese Journal of chemistry 1994年第1期12卷 1-10页

作者： NIU, Jian-Jun CHENG, Guang-Jin DONG, Shao-Jun acoratory of Electroanalytical chemistry, changchun institute of applied chemistry,chinese academy of sciences, changchun, Jilin 130022, china Laboratory of Electroanalytical chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022 China

The electrooxidation of Bilirubin (BR) in N,N'-dimethylformamide (DMF) and DMF + H_2O mixed solvent is investigated by voltammetry techniques, in situ rapid scan thin layer spectroelectrochemistry and in situ ESR spectroscopy. The data reveal that the oxidation process of BR undergoes many stages, which are all sped up by the introduction of water. The species of bilirubin taking part in the reaction is found to be changed from BR in DMF into BR' in the mixed solvents and the anodic peak potential is shifted correspondingly from +0.58 V to +0.026-+0.35 V (vs. Ag/AgCl, 1.0 M KCl). Free radicals and the dimerization of them are observed during the oxidation.

关键词： Electrooxidation bilirubin biliverdin.

THE　APPLICATION　OF　THE　MPB4　THEORY　TO　THE　INTERFACE　BETWEEN　TWO　IMMISCIBLE　ELECTROLYTE　SOLUTIONS．　PART4．　THE　DIFFERENTIAL　CAPACITANCE　OF　THE　WATER／NITROBENZENE　INTERFACE　IN　THE　PRESENCE　OF　2：2　ELECTROLYTE

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chinese Chemical Letters 1996年第7期7卷 647-650页

作者： Qi Zhi CUI Yan Xiu ZHOU GuoYi ZHU Er Kang WANG(Laboratory of Electroanalytical chemistry,changchun institute of applied chemistry,chinese academy of sciences, changchun, Jilin130022) Lab. of Electroanalytical chemistry Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun Jilin 130022

We have developed a new theoretical model based on the MPB4 theory to calculate thedifferential capacitance of the interface of 0.05mol/L MgSO4 in water and 0.1mol/L TBATPB innitrobenzene. Our results coincide with the experimental values very well. It indicates that our modelmay describe well the structure of ITIES not only in the presence of 1:1 electrolyte but also in thepresence of 2:2 electrolyte.

关键词： MPB4 THEORY OF TO BETWEEN APPLICATION