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Synthesis of n-Butyl Acetate by Microwave Irradiation Under the Assistance of Solid-Liquid Phase Transfer Catalysis Without Solvent

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Chemical Research in Chinese Universities 1992年第3期8卷 324-326页

作者： xu wen-guo, liu Fu-an, yu ai-min, LI Yao-xian, JIN Shen-xi,liu jun and JIN Qin-han (department of chemistry, jilin university, changchun, 130023)

Introduction Microwave irradiation has been very widely used in heating, cooking and brewing. Several papers which describe the use of domestic microwave ovens to perform rapid organic synthesis in solution have been published. The high heating efficiency gives rise to remarkable rate of reaction and dramatic reduction of reaction time. Nevertheless, its application seems to be limited to these procedures because of

关键词： Microwave irradiation Phase transfer catalysis Synthesis n-Butyl ace-tate Inorganic support

STUDIES ON THE SYNTHESIS OF Ti_3O_5 BY MICROWAVE INDUCED PLASMA METHOD

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Chinese Chemical Letters 1994年第5期5卷 447-448页

作者： ai min yu wen guo xu~* wen jun YANG Quan Zhong LI and Qin Han JIN (department of chemistry, Jinn university, changchun 130023)

Using a low power microwave generator and a surfatron discharge cavity, Ti3O5 was synthesized via the hydrogenation of TiO2 in surface wave induced microwave plasma. Besides, the chemical behavior of hydrogen in the p... 详细信息

关键词： Ti STUDIES ON THE SYNTHESIS OF Ti3O5 BY MICROWAVE INDUCED PLASMA METHOD

ELECTROCARBOXYLATION OF ORGANIC COMPOUNDS WITH CARBON DIOXIDE CATALYZED BY METALLOPORPHYRINS(Ⅱ)——ELECTROSYNTHESIS OF SOME ORGANIC COMPOUNDS WITH CO_2 CATALYZED BY CoTPP

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Chinese Chemical Letters 1992年第4期3卷 265-266页

作者： guo Dong ZHENG~*, Qing Da AN~(**), yu wen liu, Ying jun WANG and Xi Zhang CAO department of chemistry, jilin university, changchun, 130023 Dalian Institute of Light Industry.

The catalyzation of CoTPP for electrocarboxylation of alkyl halides, alkenes and ketones with CO_2 are studied. The electrocarboxylation of these organic compounds with CO_2 in the presenec of catalyst can occur at more positive potential than that of no catalyst. The products of electrocarboxylation were identified by UV, IR and GC-MS. The electrocarboxylation mechanisms of different organic compounds are discussed.

关键词： ELECTROCARBOXYLATION OF ORGANIC COMPOUNDS WITH CARBON DIOXIDE CATALYZED BY METALLOPORPHYRINS CATALYTIC ACTIVITIES OF METALLOPORPHYRINS FOR ELECTROCARBOXYLATION OF BENZYL CHLORIDE

SYNTHESIS OF PPCuPc FILM BY MICROWAVE PLASMA CHEMICAL VAPORIZATION DEPOSITION(MPCVD)

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Chinese Chemical Letters 1991年第11期2卷 897-900页

作者： ai min yu wen guo xu~* wen jun YANG Qin Han JIN department of chemistry Jilin UniversityChangchun130023

Using a low power microwave generator(W_(max)=100W) and a Surfatron discharge device, Plasma-polymerized copper phthalocyanine (PPCuPc) film was synthesised from monomer copper phthalocyanine(CuPc) by microwave plasma chemical vaporization deposition(MPCVD) with Ar as incorporation gas. The film was characterized by FTIR and ESCA. The role of dissociation of chemical bond in the polymerization process and the influence of substrate temperature and material on deposition were investigated in some detail.

关键词： FTIR MPCVD SYNTHESIS OF PPCuPc FILM BY MICROWAVE PLASMA CHEMICAL VAPORIZATION DEPOSITION ESCA

Quantum interference of a time-dependent wave packet of atom irradiated by an ultra-short laser pulse

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Chinese Physics B 2020年第1期29卷 223-228页

作者： wen-min Yan Ji-Gen Chen jun Wang Fu-ming guo yu-jun Yang Institute of Atomic and Molecular Physics Jilin UniversityChangchun 130012China jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopyjilin university Changchun 130012China Zhejiang Provincial Key Laboratory for Cutting Tools Taizhou UniversityTaizhou 318000China

The wave packet evolution of an atom irradiated by an intense laser pulse is systematically investigated by using the numerical solution of the time-dependent Schr?dinger *** are two types of spatial interference structures in the time-dependent evolution of the atomic wave *** the increasing of the evolution time,the interference fringe spacing for typeⅠ(typeⅡ)becomes larger(smaller).As the wavelength of the incident laser increases,the interference of the wave packet is changed from typeⅡto typeⅠ,and the shift of interference type can be attributed to the contribution of excited states by using the energy analysis of the time-dependent wave function.

关键词： high-order harmonic generation above-threshold ionization

Synthesis and Herbicidal Activity of Novel Phenoxysulfonylureas Derivatives

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Chemical Research in Chinese Universities 2009年第5期25卷 648-652页

作者： ZHANG Xin-min ZHENG Liang-yu GAO jun-long liu Qing-wen SUN guo-dong QIN Lin ZHANG Suo-qin College of chemistry Jilin University Changchun 130021 P. R. China Key Laboratory for Molecular Enzymology and Engineering of ministry of Education Jilin University Changchun 130021 P. R. China

Thirteen novel phenoxysulfonylureas derivatives were synthesized, and their structures were confirmed by MS, NMR and element analysis. The herbicidal activity and structure-activity relationship were also investigated... 详细信息

关键词： Phenoxysulfonylurea Acetohydroxyacid synthase Herbicidal activity

Proline-based Amino Pyridine Dipeptides as Efficient Organocatalysts for Direct Aldol Reaction

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Chemical Research in Chinese Universities 2010年第1期26卷 50-54页

作者： GAO jun-long ZHENG Liang-yu ZHANG Suo-qin ZHANG Xin-min SUN guo-dong QIN Lin LI Yao-xian liu Qing-wen LI Xiao-bo College of chemistry Key Laboratory for Molecular Enzymology and Engineering Ministry of Education Jilin University Changchun 130021 P. R. China

A series of proline-based amino pyridine dipeptide organocatalysts was synthesized and applied in direct asymmetric intermolecular aldol reaction. These catalysts showed good solubility in organic solvents, good yields （73%--97%） and enantioselectivitives（74%--94%）. Among them, dipeptide organocatalyst（2） was found to be the most efficient one for the asymmetric aldol reaction between cyclohexanone and 4-nitrobeznaldehyde. After optimizing the catalytic reaction conditions, we found that the catalyst showed high yield（97%）, enantioselectivity（e.e., up to 92%） and anti-diastcreoselectivity（up to 95：5） at mild room temperature without any additives.

关键词： Proline-based dipeptide Aldol reaction Enantioselectivity

Ultrasonic Degradation of Methyl Orange in Presence of Y2O3 Doping Anatase TiO2 Catalyst

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Journal of Rare Earths 2004年第z1期22卷 160-164页

作者： Wang jun guo Baodong Pan Zhijun liu Zhenrong wen Fuyu Zhang Zhaohong department of chemistry Liaoning University Shenyang 110036 China Department of Chemistry Liaoning University Shenyang 110036 China Department of Chemistry Liaoning University Shenyang 110036 China Department of Chemistry Liaoning University Shenyang 110036 China Department of Chemistry Liaoning University Shenyang 110036 China Department of Chemistry Liaoning University Shenyang 110036 China

Various affecting factors and degradation mechanism were studied on ultrasonic degradation of methyl orange adopting Y2O3 doping anatase TiO2 catalyst prepared in *** the experiment, the UV-VIS spectrophotometer was used to follow and inspect the degradation process of methyl *** results indicate that the ultrasonic degradation ratios of methyl orange in the presence of anatase TiO2 catalyst are much better than those without ***, the catalytic performance of Y2O3 doping anatase TiO2 catalyst is obviously higher than that of anatase TiO2 catalyst without *** optimal conditions were adopted in this work and the degradation and COD elimination ratio of methyl orange got to98% and 99.0% in 90 min, respectively.

关键词： Y2O3 doping anatase TiO2 catalyst ultrasonic degradation methyl orange rare earths

Information retrieval:a view from the Chinese IR community

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Frontiers of Computer Science 2021年第1期15卷 197-211页

作者： Zhumin CHEN xueqi CHENG Shoubin DONG Zhicheng DOU Jiafeng guo xuanjing HUANG Yanyan LAN Chenliang LI Ru LI Tie-Yan liu Yiqun liu jun MA Bing QIN mingwen WANG Jirong wen jun xu min ZHANG Peng ZHANG Qi ZHANG School of Computer Science and Technology Shandong UniversityJinan 250100China Institute of Computing Technology Chinese Academy of SciencesBeijing 100190China School of Computer Science and Engineering South China University of TechnologyGuangzhou 510006China School of Information Renmin University of ChinaBeijing 100872China School of Computer Science Fudan UniversityShanghai 200433China School of Cyber Science and Engineering Wuhan UniversityWuhan 430072China School of Big Data Shanxi UniversityTaiyuan 200433China Microsoft Research Asia Beijing 100080China department of Computer Science and Technology Tsinghua UniversityBeijing 100084China School of Computer Science and Technology Harbin Institute of TechnologyHarbin 150001China School of Computer Information and Engineering Jiangxi Normal UniversityNanchang 330022China School of Computer Science and Technology Tianjin UniversityTianjin 300072China

During a two day strategic workshop in February 2018,22 information retrieval researchers met to discuss the future challenges and opportunities within the *** outcome is a list of potential research directions,project ideas,and *** report describes the major conclusions we have obtained during the workshop.A key result is that we need to open our mind to embrace a broader IR field by rethink the definition of information,retrieval,user,system,and evaluation of *** providing detailed discussions on these topics,this report is expected to inspire our IR researchers in both academia and industry,and help the future growth of the IR research community.

关键词： information retrieval redefinition information scope of retrieval retrieval models users system architecture evaluation