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Synthesis of L-Aspartic Acid and Lactone Copolymers

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Chinese Chemical Letters 1998年第5期9卷 443-445页

作者： Ren Xi ZHUO Jie CHENG(department of chemistry, Laboratory of Biomedical Polymer Materials of the State EducationCommission of china, wuhan university, wuhan 430072) department of chemistry Lab. Biomed. Poly. Mat. State E.C.C. Wuhan University Wuhan 430072 China

Biodegradable poly(alc-alt-Asp) was synthesized by ring-opening polymerization of the monomer 3-(S)-[(benzyloxycarbonyl)methyl] -morpholine-2, 5-dione and subsequent catalytic hydrogenation. Copolymers of the monomer ... 详细信息

关键词： polydepsipeptide ring-opening polymerization L-aspartic acid glycolide lactide

Synthesis and Structural Characterization of a Polyphosphazeneas Photoconductivc Material

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Chinese Chemical Letters 2000年第2期11卷 103-104页

作者： Zhen LI Cai Mao ZHAN Jin Gui QIN (department of chemistry,wuhan university, wuhan 430072) department of chemistry Wuhan University Wuhan 430072 China

The synthesis of a novel polyorganophosphazene that contains charge-transporting agent as side chains for photoconductive application is reported. Structural characterization for the high polymer was presented by 1H-N... 详细信息

关键词： Photoconductive polyphosphazene synthesis structure.

Kinetic Resolution of DL-Phenylalanine Methyl Ester by α -Chymotrypsin ImmobiIized on Porous Silica Beads

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Chinese Chemical Letters 1997年第5期8卷 413-416页

作者： Li Jian LIU Ping YANG Ren Xi ZHUO(department of chemistry, wuhan university, wuhan 430072) department of chemistry Wuhan University Wuhan 430072 China

Kinetic resolution of DL-phenylalanine methyl ester was carried out using drimobilized α -chymotrypsin (IC) as catalyst. The effects of temperatUre, pH, concentration of substrate and reactionvessels on the resolutio... 详细信息

关键词： DL Chymotrypsin Immobilized on Porous Silica Beads Kinetic Resolution of DL-Phenylalanine Methyl Ester by

Alkylimido osmium(VI) and ruthenium(VI) porphyrins. Crystal and molecular structures of Os(TTP)(O)(NBu^t)·EtOH and Os(4-Cl-TPP)(NBu^t)_2

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Chinese Journal of chemistry 1997年第1期15卷 1-12页

作者： LI, Zao-Yingdepartment of chemistry, wuhan university, wuhan, Hubei 430072, chinaCHE, Chi-Ming department of chemistry, The Hong Kong university, Hong Kong department of chemistry Wuhan University Wuhan Hubei 430072 China department of chemistry Hong Kong University Hong Kong Hong Kong

Oxo(tert-butylimido) or bis(tert-butylimido)osmium(VI) porphyrins Os(Por)(O)(NBut) and Os(Por)(NBut)2, [Por=meso-tetrakis(p-tolyl)porphyrinato (TTP) and meso-tetrakis(4-chlorophe-nyl)porphyrinato (4-Cl-TPP)] were synthesized by air oxidation of bis(tert-butylamme)osmium(II) porphyrins [Os(Por)(H2NBut)2 (Por=TPP, 4-Cl-TPP], depending on whether tert-butylamine is present. The bis(tert-butylamine)ruthenium(II) porphyrins [Ru(Por)(H2NBut)2, Por=TTP, 4-Cl-TPP] can undergo bromine oxidation to give oxo(tert-butylimido)ruthenium(VI) complexes in quantitative yields. All these new complexes were characterized by 1H NMR, UV-Visible and IR spectroscopy. The X-ray crystal structures of Os(TTP)(O)(NBut).EtOH and Os(4-Cl-TPP)(NBut)2 have been determined. Crystal data: for Os(TTP)(O)(NBut).EtOH: monoclinic, space group P21/c, a=1.3546(6) nm, b=2.3180(3) nm, c=1.6817(3) nm, B=90.84(2), V=527.97(1) nm3, Z=4. The Os=O and Os=NBut distances in Os(TTP)(O)(NBut).EtOH are 0.1772(7) nm and 0.1759(9) nm, respectively. The average Os=NBut distance of Os(4-Cl-TPP)(NBut)2 is 0.1775 nm.

关键词： Alkylimido ruthenium osmium porphyrin crystal structure

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Ag^＋的BZ振荡反应动力学研究

武汉大学学报（自然科学版） 1994年第2期40卷 100-104页

作者：方贤安安从俊刘义林智信蔡汝秀武汉大学化学系

用电化学方法研究了Ａｇ＋－Ｃｅ（ＳＯ４）２－ＫＢｒＯ３－ＣＨ２（ＣＯＯＨ）２－Ｈ２ＳＯ４化学振荡反应动力学．考察不同［Ａｇ＋］对振荡反应曲线的影响时发现，若体系中含有痕量Ａｇ＋时，则对振荡曲线产生显著影响，不同［Ａｇ... 详细信息

用电化学方法研究了Ａｇ＋－Ｃｅ（ＳＯ４）２－ＫＢｒＯ３－ＣＨ２（ＣＯＯＨ）２－Ｈ２ＳＯ４化学振荡反应动力学．考察不同［Ａｇ＋］对振荡反应曲线的影响时发现，若体系中含有痕量Ａｇ＋时，则对振荡曲线产生显著影响，不同［Ａｇ＋］与振荡周期ｔｐ有良好的线性关系，线性范围为２×１０－７～１．８×１０－５ｍｏｌ·Ｌ－１，是一重现性好，灵敏度高，操作条件简单的动力学分析测试体系，升高温度可缩短反应的振荡周期ｔｐ，将ｌｎ１／ｔ，对１／Ｔ作图符合阿累尼乌斯线性关系，振荡周期ｔｐ的表观活化参数Ｅ＇ｐ＝６７．５１ｋＪ·ｍｏｌ－１，与未加Ａｇ＋的ＢＺ振荡周期表观活化参数Ｅ＇ｐ＝５８．４９ｋＪ·ｍｏｌ－１相比较可知，Ａｇ＋可使振荡周期表观活化参数增加．最后本文还对Ａｇ＋参与下的ＢＺ振荡反应体系的可能机理进行了探讨，提出Ａｇ＋可起“溴离子缓冲泵”的作用机理．

关键词：振荡反应银离子动力学催化剂

Dirichlet Problems for the Quasilinear Second Order Subelliptic Equations

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Acta Mathematica Sinica,English Series 1996年第1期12卷 18-32页

作者： Xu Chaojiang department of Mathematics wuhan university wuhan, 430072 china 武汉大学数学系湖北武汉

In this paper, we study the Dirichlet problems for the following quasilinear secondorder sub-elliptic equation, sum from i,j=1 to m(X~*(A(x,u)Xu)+sum from j=1 to m(B(x,u)Xu+C(x,u)=0 in Ω, u=φ on Ω,where X={X, …, X} is a system of real smooth vector fields which satisfies the Hrmander’scondition, A(i,j), B, C∈C~∞(■×R) and (A(x, z)) is a positive definite matris. We have provedthe existence and the maximal regularity of solutions in the "non-isotropic" Hlder space associatedwith the system of vector fields X.

关键词： Sub-elliptic equation Dirichlet problem A priori estimate

ALMOST SURE AND QUASI-SURE GROWTH OF DIRICHLET SERIES

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Chinese Annals of Mathematics,Series B 1996年第3期17卷 343-348页

作者： YU JIARONG(department of Mathematics, wuhan Uniyersity, wuhan 430072, china.) department of Mathematics Wuhan University Wuhan 430072 China

For a given Dirichlet series absolutely convergent and of order (R)p∈(o, +) in the right-halfplan, its terms can be multiplied respectively by the members of a suitable sequence defined ina probability or topological space such that the series obtained is of order (R)ρ on any one ofcountably infinite horizontal haif lines almost or quasi surely.

关键词： Dirichlet series Almost sure growth Quasi-sure growth

Synthesis of Two New Types of N-Phenyl and N,N'-Diphenyl Azathiacrown Ether Analogs

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Chinese Chemical Letters 1998年第1期9卷 17-20页

作者： Chang Rong NIU Hua JIANG and Cheng Tai WU (department of chemistry, wuhan university, wuhan 430072) department of chemistry Wuhan University Wuhan 430072 China

Two types of N-phenyl and N,N-diphenyl azathiacrown ether analogs, Which contain two sulfur atoms, one or two oxygen atoms. and one or two nitrogen atoms, were synthesized by the reaction of an appropriate halide with... 详细信息

关键词： Azathiacrown Ether Analog,α,ω-dithiol

Synthesis of Polymer-Bonded Quaternary Ammonium Type Metal Porphyrins

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Chinese Chemical Letters 2000年第1期11卷 27-28页

作者： Zao Ying LI Cong LI Xu Ye WU( department of chemistry, wuhan university, wuhan 430072) department of chemistry Wuhan University Wuhan 43072 China

The reaction of pyrrole with 4-hydroxybenzaldehyde and 4-pyridinecarboxaldehyde afforded new porphyrin ligand 1. Treatment of 1 with copper( II ) acetate, cobalt ( II ) acetate gave complexes 2-3 respectively. 2 and 3 reacted with Merrifield's peptide resin produced 4 and 5. Complexes 4 and 5 reacted with methyl iodide respectively gave 6-7. The new compounds 1-7 have been identified by H-1 NMR, IR, MS and UV-visible spectra, elemental analysis and AES.

关键词： polymer-bonded quaternary ammonium type metal porphyrin synthesis