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simultaneous Reduction of Nitro Group and s-s Bond in Nitrodisulfides by samarium Diiodide: A New Approach to Benzothiazolines

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Chinese chemical Letters 2000年第5期11卷 387-388页

作者： Xiao Yuan CHEN Wei Hui ZHONG Yong Min ZHANGI (department of chemistry Zhejiang {2. at Xixi Campus. Hangzhou 31002. department of chemistry.Hunan Jishou {2.. Jishou 416000) Zhejiang Univ Dept Chem Hangzhou 310028 Peoples R China Hunan Jishou Univ Dept Chem Jishou 416000 Peoples R China

Nitrodisulfides were reduced by smI2.HMPA in anhydrous THF at room temperature to produce active intermediates (samarium thiolates and amides), which were 'living' double-anions and reacted smoothly with aldehydes or ... 详细信息

关键词： samarium diiodide reduction nitro group disulfide benzothiazoline

surface investigation on Upilex-s polymide film iradiated by vacuum ultraviolet radiation

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Rare Metals 2007年第S1期26卷 168-174页

作者： LIU Yuyan1),GONG Xianyun2.,WAN Zhimin3),and DU Xingwen4)1) department of Applied chemistry,Harbin Institute of Technology,Harbin 150001,China 2. department of Life science and chemistry,Harbin university,Harbin 150001,China 3) Analysis and Measurement Center,Harbin Institute of Technology,Harbin 150001,China 4) Center for Composite Materials,Harbin Institute of Technology,Harbin 150001,China Harbin Inst Technol Dept Appl Chem Harbin 150001 Peoples R China Harbin Univ Dept Life Sci & Chem Harbin 150001 Peoples R China Harbin Inst Technol Ctr Anal & Measurement Harbin 150001 Peoples R China Harbin Inst Technol Ctr Composite Mat Harbin 150001 Peoples R China

Vacuum ultraviolet radiation of Upilex-s polyimide film 2. μm thick was performed using a gas jet type of vacuum ultraviolet simulator which gives unfixed wavelength from 5 nm to 2.0 *** redeposited on the films were observed and the nanoparticles formed on the surface consist mainly of carbon *** in the composition and the chemical characteristics of film surface after radiation were identified by X-ray photoelectron spectroscopy(XPs).Relative O content in the radiated area was found to be higher,while N content was lower than in the pristine *** indicates that Upilex-s polyimide film releases N atoms as volatile *** the C1s,O1s envelopes were fitted using Multipak spectrum *** surface morphologies on iradiated area were examined by Atomic Force Microscope(AFM).Pieces of radiant products protrude from the eradiated surface,leading to considerable roughness for the iradiated *** the surface transmittance of Upilex-s film after radiation reduces.

关键词： vacuum ultraviolet radiation Upilex-s polyimide film

Electrochemical study of sulfide solution in the presence of surfactants

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Journal of Environmental sciences 1998年第3期10卷 117-122页

作者： Yi Qing feng department of chemical {2., Xiangtan Polytechnic university, Xiangtan 4112.1, China Chen Qi yuan, Zhang Ping min department of chemistry, Central south university of Technology, Changsha 410083, China

Voltammetric curve studies on aqueous Na_ 2. solution in the presence of three types of surfactants were presented. Presence of anodic surfactant (HTAB) increases anode current density and makes the corresponding anode peak potential shift to more negative. Potentials of the reduction of elemental sulfur to intermediates s^2.x shift to more negative with the increasing of HTAB concentrations. In the presence of HTAB, the anode current density at 77℃ increases more than at 34℃. The electrolysis indicates that anodic product sulfur loosely adhered to the graphite electrode surface when HTAB is added to the anolyte. The total efficiency of producing sulfur is high after several times of cycle electrolysis. The results showed that anode passivation is minimized in the presence of HTAB. The depassivation effect of HTAB was discussed. 

关键词： surfactant sulfur sulfide voltammetry.

synthesis and Magnetic Properties of Copper (Ⅱ) Complexes with Pyridine N-Oxide-2.ylmethy-lidenedithiocarbazate as Ligands

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chemical Research in Chinese Universities 1990年第4期6卷 255-261页

作者： Gou shaohua , You Xiaozeng and Xu Zheng (Coordination chemistry Institute, Nanjing university, Nanjing)Zhu Duolin and Yu Yunpen ({2. of chemistry, Zhenjiang teacher’ s College, Zhenjiang)

A series of copper (Ⅱ) complexes with pyridine N- oxide- 2. ylmethylidened-ithiocarbazates as ligands were synthesized and characterized by IR spectra, electronic spectra and magnetic moments measurement at room temperature. Variable temperature magnetic susceptibilites (3-300K) of four complexs were measured and fitted with the Bleaney-Bowers dimer equation by considering the magnetic interaction between molecules. The fitting results show the existence of intramolecular ferromagnetic interactions and intermolecu-lar anti-ferromagnetic interactions in these copper( Ⅱ) complexes.

关键词： Pyridine N-oxide-2.ylmethylidenedithiocarbazate Copper(Ⅱ) complex Magnetic susceptibility

Reductive Cleavage of s-s Bond by samarium Diiodide: synthesis of β-Thioesters and β-Thionitriles

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Chinese chemical Letters 1999年第1期10卷 7-8页

作者： Hua Jiang JIANG Yong Min ZHANG(department of chemistry, Hangzhou {2., Hangzhou, Zhejiang, 31002.) Hangzhou Univ Dept Chem Hangzhou 310028 Peoples R China

The reduction of disulfides by samarium diiodide led to sa arium thiolates (Arssml2..This new thiolate anion species reacted smoothly with α, β -unsaturated esters (nitriles) to give 1,4-addition products β -thioes... 详细信息

关键词： β-thioesters β-thionitriles samarium diiodide synth esis

[(NaC_9H_6)Me_2.C_5H_4]_2.m(Ⅱ)(THF)_2.合成及其催化MMA聚合的研究

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中国稀土学报 2002年第Z3期20卷 26-29页

作者：龚新强齐民华沈琪沈之荃苏州大学化学化工系江苏苏州215006 浙江大学高分子科学与工程系浙江杭州310027

以茚基锂与6,6 二甲基富瓦烯的环外双键加成反应合成了一个新型取代茂基锂[(C9H7)Me2.]C5H4Li(1,其中C5H4代表一取代环戊二烯基),(1)与无水三氯化钐按2.1摩尔比反应后,再用与稀土钐的摩尔比为3∶1的钠砂处理,合成了二价钐的三核双金属... 详细信息

以茚基锂与6,6 二甲基富瓦烯的环外双键加成反应合成了一个新型取代茂基锂[(C9H7)Me2.]C5H4Li(1,其中C5H4代表一取代环戊二烯基),(1)与无水三氯化钐按2.1摩尔比反应后,再用与稀土钐的摩尔比为3∶1的钠砂处理,合成了二价钐的三核双金属配合物[(NaC9H6)Me2.C5H4]2.m(Ⅱ)(THF)2.2.其中C9H6代表茚基)。该配合物经元素分析和红外光谱表征,并发现(2.能高活性地催化甲基丙烯酸甲酯聚合,得到等规含量较高的聚甲基丙烯酸甲酯。

关键词：稀土合成钠钐双金属稀土配合物聚合甲基丙烯酸甲酯

Facile synthesis of 1 -Ferrocenyl-3-amino Carbonyl Compounds by Being Ground in Free solvent

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Facile Synthesis of 1 -Ferrocenyl-3-amino Carbonyl Compounds...

Analysis of Effective Composition of Hippophae Rhamnoides L.

中国化学会第四届有机化学学术会议

作者： YANG Jin-Ming JI, shun-Jun (College of chemistry and chemical {2., suzhou university, suzhou 2.5006) (department of chemistry, Yancheng teacher''s College, Yancheng 2.4002.

＜正＞β-Amino carbonyl compounds are versatile intermediates for a large number of organic compounds and the derivatives of ferrocene have being attracted the attention of scientists all over the world because of their numerous applications in chemical sensing, asymmetric catalysis, material science and medical chemistry. As a part of program aiming to the synthesis of potential biological or pharmacological active compounds and with the increasing interest of our group in efficient, economic and environmentally friendly reactions, now we have searched an optimized route to 1-ferroceny1-3-amino carbonyl compounds via Michael-type reaction of amines to ferrocenylenones by being ground under solvent-free and catalyst-free conditions at room temperature.

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来源： cnki会议评论

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chemical Research in Chinese Universities 2002年第3期18卷 274-276页

作者： JIN Xiang jun department of chemistry, Baicheng {2. College, Baicheng 137000, P. R. ChinaLUO Xu yang, WANG Ying, LIU Zai qun, ZHANG Jing wen and sUN Yun xiuCollege of chemistry of Jilin university, Changchun 13002., P. R. China Baicheng teacher Coll Dept Chem Baicheng 137000 Peoples R China Jilin Univ Coll Chem Changchun 130023 Peoples R China

The vitamin E, proteins, amino acids, sugar, trace elements and fatty acids in the oil of Hippophae Rhamnoides L. seeds were quantitatively analyzed. several methods for analyzing vitamin E were compared with eac... 详细信息

关键词： Hippophae Rhamnoides L. seeds oil Composition analysis

Molecular and quantum mechanical studies on the monomer recognition of a highly-regular β-helical antifreeze protein

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science China chemistry 2004年第1期47卷 34-40页

作者： YANG Zuoyin, JIA Zongchao, LIU Ruozhuang & CHEN Guangjudepartment of chemistry, Beijing Normal {2., Beijing 100875, China Faculty of science, Beijing {2. of chemical Technology, Beijing 10002., China department of Biochemistry, Queen’s {2., Kingston, Ontario K7L 3N6, Canada 1. department of chemistry Beijing Normal University 100875 Beijing China 2. Faculty of science Beijing University of Chemical Technology 100029 Beijing China 3. department of Biochemistry Queen? University K7L 3N6 Kingston Ontario Canada

The possible interaction models for an antifreeze protein from Tenebrio molitar (TmAFP) have been systematically studied using the methods of molecular mechanics, molecular dynamics and quantum chemistry. It is hoped that these approaches would provide insights into the nature of interaction between protein monomers through sampling a number of interaction possibilities and evaluating their interaction energies between two monomers in the course of recognition. The results derived from the molecular mechanics indicate that monomer? β-sheets would be involved in interaction area and the side chains on two p-faces can match each other at the two-dimensional level. The results from molecular mechanics and ONIOM methods show that the strongest interaction energy could be gained through the formation of H-bonds when the twoβ-sheets are involved in the interaction model. Furthermore, the calculation of DFT and analysis of van der Waals bond charge density confirm further that recognition between the two TCTs mainly depends on inter-molecular hydroxyls. Therefore, our results demonstrate that during the course of interaction the most favorable association of TmAFPs is via their β-sheets.

关键词： antifreeze protein, recognition, dynamics simulation, molecular mechanics, quantum chemistry.