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The Electrochemical Characteristics of Multilayer Assembly of Hemoglobin and Polystyrene Sulfonate at Self-assembled MonolayerSurface

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Chinese Chemical Letters 2000年第1期11卷 81-84页

作者： Hong SUN (Department of chemistry, Textile college, Qingdao University, Qingdao 2.6071) Department of chemistry Textile College Qingdao University Qingdao 266071 China

A multilayer film of hemoglobin (Hb) molecules and polyelectrolyte sulfonate were fabricated on a thiol self-assembled monolayers (SAMs) by electrostatic force. The Hb maintains electroactive property in the multilayer film, methylene blue (MB) incorporated into the multilayer can enhance the electron transfer rate between the Hb and the electrode surface.

关键词： multilayer film hemoglobin methylene blue

On mathematical arbitrariness of some papers on the potential homologous linear rule investigation

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Chinese Science Bulletin 2000年第23期45卷 2203-2208页

作者： SUN YukunDepartment of chemistry, Hainan Teachers college, Haikou 571158, China Department of chemistry Hainan Teachers College Haikou China

The history of homologous linear rule investigation is reviewed simply. The author puts forward a problem worth paying attention to in the recent potential homologous linear rule investigation, especially some mistakes made in these investigations on mathematical foundations. The author also exposes the mathematical arbitrariness of some papers on their potential homologous linear rule investigation.

关键词： homologous linear rule investigation conjugated systems multiring aromatic hydrocarbon potentials.

可见光催化烯烃的三组分串联三氟甲基化/偕二氟烯丙基化

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Journal of Donghua University(English Edition) 2024年第1期41卷 57-71页

作者：袁汶雯黄焰根孟卫东东华大学化学与化工学院上海201620

描述了一种高效的可见光诱导富电子烯烃的三氟甲基化/偕二氟烯丙基化三组分串联反应。三氟甲基(—CF_(3))自由基由市售的三氟甲磺酸钠(CF_(3)SO_(2.Na)生成,依次与富电子烯烃和α-三氟甲基烯烃相匹配,最后通过β-F消除得到多氟烯烃。该... 详细信息

描述了一种高效的可见光诱导富电子烯烃的三氟甲基化/偕二氟烯丙基化三组分串联反应。三氟甲基(—CF_(3))自由基由市售的三氟甲磺酸钠(CF_(3)SO_(2.Na)生成,依次与富电子烯烃和α-三氟甲基烯烃相匹配,最后通过β-F消除得到多氟烯烃。该方法的优点是反应条件温和,官能团耐受性好,底物范围广,反应效率高,为药物和天然产物衍生物的后期改性提供了更多可能。

关键词：自由基加成三氟甲基化偕二氟烯丙基化烯烃

A New Model for Calculation of Standard Entropies of Solid Compounds Ⅳ-Calculation of Standard Entropies of Solid Complex Silicates S

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Chinese Chemical Letters 1998年第5期9卷 477-479页

作者： Xun Min YU(Department of chemistry, Jingzhou Teachers college, Hubei 434100) Department of chemistry Jingzhou Teachers College Hubei 434100 China

This paper presents a new model for the calculation of the standard entropies of solidcomplex silicates as follows.4. =53.63+9914-72.81 J/kmol (R=0.9915, Sd=5.39)Sixty complex silicates have been investigated, and go... 详细信息

关键词： standard entropy silicate pseudo-positiveion

Preparation and Characterization of Polymer－Supported Rare Earth Complexes

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Chemical Research in Chinese Universities 1995年第4期11卷 342-353页

作者： YU Guang-qian and LI Yu-liang(Changchun Institute of Applied chemistry,Academia Sinica,Changchun,13002.)Ll Xiao-li(Department of chemistry,Changchun Normal {2., {2., Changchun,130032. ACAD SINICA CHANGCHUN INST APPL CHEMCHANGCHUN 130022PEOPLES R CHINA CHANGCHUN NORMAL COLL DEPT CHEMCHANGCHUN 130032PEOPLES R CHINA

he polymers containing different ligand groups of atoms(mainly O,N,and S)and their rare earth complexes were prepared,characterized and classified based on the type of metal-ligand bonding. The catalytic activities of the complexes are briefly *** polymer- supported rare earth complexes shwed much greater activities than the correspond- ing complexes with a low molecular weight.

关键词： Rare earth complexes Polymer-support Butadiene polymerization Catalytic activities.

In situ preparation of Nanoparticles/polymer composites

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Science China(Technological Sciences) 2008年第11期51卷 1886-1901页

作者： SUN HaiZhu & YANG Bai State Key Lab of Supramolecular Structure and Materials, college of chemistry, Jilin University, Changchun 130012. China college of chemistry, Northeast Normal University, Changchun 13002., China State Key Lab of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun China college of chemistry Northeast Normal University Changchun China

Nanoparticle (NP) is the matter between molecule and bulk material. It has attracted much attention in catalysis, optoelectronics and biology due to its unique physical and chemical properties. Incorporation of these NPs into the polymer matrix is one of the best methods to display their special functions, which not only stabilize the NPs but also realize the functional assembly of NPs and polymers. However, reali- zation of this idea depends largely on the compatibility of NPs and polymers as well as the interaction between them. Therefore, many methods have been developed to prepare the composites of NPs and polymers in order to obtain the function ex- pected. In this review, we mainly focus on the combination of in situ method with other methods to synthesize different functional one-dimension, two-dimension as well as bulk composites, which has been recently developed by our group. The most striking character of our method is the excellent compatibility between NPs and polymers which ensures a homogeneous distribution of NPs in the polymer matrix. The existence of the polymer network makes the NPs more stable, and is significant for displaying their functions.

关键词： in situ nanoparticle polymer composite function

STABILITY OF POLY(N,N'-METHYLENEBISACRYLAMIDE-co-4-VINYLPYRIDINE)MICROGEL DISPERSION AND ADJUSTMENT OF THE HYDROPHOBICITY IN THE MICROGELS

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Chinese Journal of Polymer Science 2005年第6期23卷 635-642页

作者： Qing-de Chen Xing-hai Shen and Hong-cheng Gao Department of Applied chemistry,college of chemistry and Molecular Engineering,Peking University,Beijing 100871,China Department of Applied chemistry College of Chemistry and Molecular Engineering Peking University Beijing 100871 China

In the UV-Vis spectra of pure light-scattering systems, there is an exponential relationship between absorbance and wavelength （A = Kλ^-n）. Here, the exponent n is named as flocculation-coagulation parameter. In the present paper, the effects of different additives on the stability of poly（N,N＇-methylenebisacrylamide-co-4-vinylpyridine）（poly（Bis-co-4-VP）） microgel dispersion were studied in detail via this parameter. The results showed that the stability of the dispersion mainly comes from the ionization of pyridine groups, making the microgel positively charged on its surface. This was confirmed by the measurement of Zeta potential and the result of conductometric titration. The result of fluorescence analysis indicated that the hydrophobicity in the microgels is enhanced with the increase in total 4-VP unit content.

关键词： Microgel dispersion(s) 4-Vinylpyridine Flocculation-coagulation parameter Zeta potential

EFFECTS OF L-PHENYLALANINE ON THE RADIATION SYNTHESIS OF POLY(N,N'-METHYLENEBISACRYLAMIDE-co-4-VINYLPYRIDINE)(MICRO)GELS

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Chinese Journal of Polymer Science 2005年第6期23卷 643-650页

The effects of L-phenylalanine （L-Phe） on the synthesis ofpoly（N,N＇-methylenebisacrylamide-co-4-vinylpyridine）（poly（Bis-co-4-VP））（micro）gels by γ-ray irradiation were studied. The addition of L-Phe could not only decrease the gelation dose （Dg） of the synthesis obviously, but also transform the morphology of copolymer from microgel to gel. In addition, the swelling ability of the （micro）gels was also affected in the presence of L-Phe. The decrease of Dg was ascribed to the effect of pH, while the transformation of the morphology was ascribed to the effect of L-Phe on the stability of the poly（Bis-co-4-VP） microgel. Such an effect was confirmed further as compared with the effects of L-alanine, L-glutamic acid, L-arginine, sulfuric acid and aqueous ammonia.

关键词： L-Phenylalanine γ-Ray irradiation Gelation dose Morphology transformation (Micro)gel

Theoretical study on the hydrolysis mechanism of N,N-dimethyl-N′-(2.,3′-dideoxy-3′-thiacytidine)formamidine

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Science China chemistry 2008年第10期51卷 911-917页

作者： ZHANG Chang1 & XUE Ying2. 1 college of chemistry and Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, China 2.college of chemistry, Sichuan University, Chengdu 610064, China college of chemistry and Environment Protection Engineering Southwest University for Nationalities Chengdu China college of chemistry Sichuan University Chengdu China

The hydrolysis mechanisms of N,N-dimethyl-N′-(2.,3′-dideoxy-3′-thiacytidine)formamidine (FA-3TC) in the gas phase and in aqueous solution were studied by use of the density functional theory B3LYP/6-31+G(d, p) method. Two possible reaction pathways in the title reaction were considered. In one pathway water attacks the C=N double bond first (path A) while in the other water attacks the C—N single bond first (path B). The calculated results indicate that the first step in both pathways is the rate-limiting process and path A is more favorable than path B in the gas phase. The effect of solvent water on the title reaction was assessed at the B3LYP/6-31+G(d, p) level of theory based on the po-larizable continuum model (CPCM). In water the first mechanism (path A) is also favored.

关键词： N N-dimethyl-N′-(2. 3′-dideoxy-3′-thiacytidine)formamidine hydrolysis solvent effect B3LYP polarizable continuum model