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Cobalt-catalyzed cascade hydroalkenylation of 1,6-enynes with chalcones

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Organic Chemistry Frontiers 2022年第6期9卷 1616-1620页

作者： Chunxiang Pan Gaowei Wang Hengyuan Zhao Jianxiao Ni Ruifeng fan Yongyun Zhou Yuanbin Zhu Shiyuan Wu baomin fan State Ethnic Affairs Commission Kunming 650500China Yunnan Tiefeng High Tech Mining Chemicals.Co.Ltd Qingfeng Industrial ParkLufeng651200 Yunnan ProvinceChina

An efficient stereoselective cobalt-catalyzed hydrovinylative cyclization of 1,6-enynes with chalcones toobtain functionalized pyrrolidines has been developed. The products were furnished in good yields withup to 93% ... 详细信息

关键词： catalyzed cyclization initiated

Metal-Free Visible-Light-Induced Atom-Transfer Radical Addition Reaction of Alkenes/Alkynes with ICH_(2)CN

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Chinese Journal of Chemistry 2022年第17期40卷 2040-2046页

作者： Chunxiang Pan Yunyan Meng Yao Deng Bingjie Zhou Jingchao Chen Zhenxiu He Weiqing Sun Ruhima Khan baomin fan Key Laboratory of Chemistry in Ethnic Medicinal Resources Yunnan Minzu UniversityYuehua StreetKunmingYunnan650500 China Key Laboratory of Advanced Synthetic Chemistry Yunnan Minzu UniversityYuehua StreetKunmingYunnan650500 China

New blue-light promoted methods for the addition of iodoacetonitrile(ICH_(2)CN)to alkene/alkynes have been developed.The reaction led to the formation of cyanoalkylated products when conjugated alkene/styrene was used.In the case of alkynes and non-conjugated alkenes,iodoalkylation takes place furnishing the corresponding alkenyl iodides and alkyl iodides,respectively.Notably,trans-alkenyl iodides were obtained as the major product.A plausible reaction mechanism is also proposed.

关键词： Blue LED Photochemistry Alkenes Alkynes Cyanoalkylation Carboiodination

Anti-corrosive mechanism of poly(N-ethylaniline)/sodium silicate electrochemical composites for copper:Correlated experimental and in-silico studies

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Journal of Materials Science & Technology 2021年第13期72卷 202-216页

作者： Hao Liu baomin fan Guifeng fan Yucong Ma Hua Hao Wen Zhang College of Chemistry and Materials Engineering Beijing Technology and Business UniversityBeijing 100048China Institute of Chemistry Chinese Academy of SciencesBeijing 100190China College of Biology and Environmental Engineering Zhejiang Shuren UniversityHangzhou 310015China

Poly(N-ethylaniline)(PNEA)composites with varying silicate content were fabricated on copper through a novel electropolymerized strategy in acidic solution.Thickness,compactness,conductivity and adhesive strength of the composite(PNEA-10 Si)were optimized as silicate content reached 10 m M.Electrochemical,morphological and solution analyses were employed to evaluate the protective performance of PNEA and PNEA-10 Si coatings for copper in 3.5%Na Cl solution.Results of electrochemical analyses indicated that as-prepared coatings retarded the oxygen reduction process efficiently for copper in 3.5%Na Cl solution,drained corrosion current density and elevated interfacial charge transfer resistance.Due to favorable barrier effect,compact structure and low porosity index,PNEA-10 Si composite exhibited superior anti-corrosive performance,which was more tolerant than PNEA during long-time immersion.PNEA-10 Si coated sample exhibited a stable topography after 144 h immersion with the minimum concentration of released ions revealing the improved protection capacity.Electronic/atomic-multiscale calculations were conducted to clarify the deposition and protection mechanism of as-prepared coatings.Outcomes of density functional theory corroborated that silicate is stabilized in the PNEA layer via electrostatic force;and immobile silicate positively contributed to the charge transfer barrier of the composite.Molecular dynamics simulations evidenced that the favorable compatibility between PNEA and silicate facilitated polymer deposition and confined in-situ ions diffusion.

关键词： Electrochemical deposition Composite coating Anti-corrosion Density-functional theory Molecular dynamic simulation

Novel Designed PEG-Dicationic Imidazolium-Based Ionic Liquids as Effective Plasticizers for Sustainable Polylactide

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Chinese Journal of Chemistry 2021年第8期39卷 2234-2240页

作者： Huijie Zuo Xiangjian Chen Yingli Ding Liang Cui baomin fan Li Pan Kunyu Zhang School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300350China Polyolefin Research Department Petrochina Petrochemical Research InstituteBeijing 102206China Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics Beijing Technology and Business UniversityBeijing 100048China

A series of novel polyethylene glycol-dicationic imidazolium-based ionic liquids(mPEG-ILs)were synthesized by facile quaternization reaction from various elaborately designed di-imidazoles and PEG,which were then stud... 详细信息

关键词： Ionic liquids Plasticizers Polylactide Chain structure Hydrogen bonds

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偕二氟烯丙基硅的光催化合成

云南大学学报（自然科学版） 2024年第2期46卷 327-337页

作者：李智杨春晖温万柳孙蔚青和振秀陈景超樊保敏云南民族大学民族医药学院云南昆明650500 云南民族大学化学与环境学院云南昆明650500

烯丙基硅化合物是合成创新材料单体或医药中间体的重要化合物和合成中间体.文章报道了4CzIPN作为有机光催化剂催化的硅基羧酸的脱羧偕二氟烯丙基化反应.该反应使用在空气中能够稳定存在且容易大量合成的硅酸作为硅源,在温和的条件下高... 详细信息

烯丙基硅化合物是合成创新材料单体或医药中间体的重要化合物和合成中间体.文章报道了4CzIPN作为有机光催化剂催化的硅基羧酸的脱羧偕二氟烯丙基化反应.该反应使用在空气中能够稳定存在且容易大量合成的硅酸作为硅源,在温和的条件下高效合成偕二氟烯丙基硅化合物.结果为制备具有良好官能团相容性的偕二氟烯丙基硅化合物提供了一种快速、简单、经济的光化学合成方法.

关键词：烯丙基硅基化偕二氟烯丙基偕二氟烯烃烯丙基硅烷光催化

Elementary Experiences,Problems and Countermeasures of County Forestry Economy

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Asian Agricultural Research 2013年第3期5卷 16-20页

作者： Shaozhi CHEN baomin fan Rong ZHAO Youjun HE Decheng ZHANG Research Institute of Forestry Policy and Information Chinese Academy of Forestry

County forestry economy is a strong power for regional green economic development,and an important way to improve farmers' income and promote living environment in urban and rural areas. According to the investigation of ten typical counties or cities with forestry industrial advantage,this paper sums up the elementary experiences of county forestry economy,analyzes its prominent problems. Countermeasures are brought forward to improve the development of county forestry economy.

关键词： Forestry County economy Technological innovation I

A Tremella-like Mesoporous Calcium Silicate Loaded by TiO_(2) with Robust Adsorption and Photocatalytic Degradation Capabilities

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Journal of Wuhan University of Technology(Materials Science) 2022年第2期37卷 184-193页

作者：姜超温变英樊保民 WANG Manman College of Chemistry and Materials Engineering Beijing Technology and Business UniversityBeijing 100048China

A titanium dioxide loaded tremella-like mesoporous calcium silicate hydrate(TiO_(2)@CSH)with both adsorption and photocatalytic degradation activity was successfully prepared by a hydrothermal method combined with sol-gel strategy in two steps in this work.Tremella-shaped CSH provides abundant active sites for accommodating of TiO_(2),thus the corresponding TiO_(2)@CSH achieved a high loading ratio of 36.73%.Such a special shaped TiO_(2)@CSH exhibits excellent pre-enrichment capacity and photocatalytic degradation capacity for organic pollutants.Bisphenol A(BPA)removal experiments show that TiO_(2)@CSH can remove 91.17%of BPA from aqueous solutions.Studies on removal mechanism suggest that BPA tends to bind on the interface between CSH and TiO_(2) and the pre-enrichment process conforms to the intraparticle diffusion model;and then,it is decomposed to harmless substances of CO_(2) and H_(2)O during the photocatalytic process.The experimental results show that loading functional nanoparticles such as TiO_(2) on the surface of inorganic porous materials can endow inert porous materials with new functions such as photocatalytic degradation,which effectively expands the application range of inorganic porous materials.

关键词： TiO_(2)@CSH adsorption photocatalytic degradation synergetic mechanism

Experimental and theoretical studies on the removal mechanism of formaldehyde from water by mesoporous calcium silicate

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Science China(Technological Sciences) 2020年第10期63卷 2098-2112页

作者： WANG ManMan fan baomin WEN BianYing JIANG Chao School of Materials Science and Mechanical Engineering Beijing Technology and Business UniversityBeijing 100048China

Most porous materials with high specific surface area and diverse internal structures possess good adsorption ability.In this work,a tremella-like mesoporous calcium silicate hydrate(CSH)with high adsorption capacity was successfully prepared via a facile hydrothermal method.The adsorption effect and adsorption mechanism of the as-prepared calcium silicate hydrate(APCSH)towards formaldehyde from water were investigated systematically.Results indicate that AP-CSH has high Ca/Si ratio(1.95),large specific surface area(122.83 m2 g-1)and exhibits excellent adsorption capacity.The results of batch adsorption experiments show that AP-CSH can remove formaldehyde from water rapidly and effectively with the maximum removal efficiency of 98.94%.The adsorption process agrees well with the pseudo-second-order and Freundlich isotherm model.Furthermore,regeneration can be achieved by simply immersing AP-CSH in absolute ethanol and the removal efficiency can still reach about 99.50%after five cycles.The adsorption mechanism was also studied by experimental analyses and molecular dynamics simulation.Both experimental results and theoretical simulation support that formaldehyde adsorption over AP-CSH belongs to chemical adsorption.

关键词： chemical adsorption mechanism molecular dynamics simulation mesoporous calcium silicate formaldehyde

AgOTf-Catalyzed Tandem Reaction of Oxabenzonorborna- dienes with Arylacetylenes

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Chinese Journal of Chemistry 2015年第10期33卷 1115-1118页

作者： Yongyun Zhou Shanshan Liu Hualei Chen Jingchao Chen Weiqing Sun Sifeng Li Qingjing Yang baomin fan YMU-HKBU Joint Laboratory of Traditional Natural Medicine Yunnan Minzu University Kunming Yunnan 650500 China

A tandem isomerization/hydroarylation reaction of oxabenzonorbomadienes and arylacetylenes was realized by using AgOTf as catalyst. 1,1-Diarylethylenes could be easily generated as products in moderate to good yields ... 详细信息

关键词： silver tandem reaction catalyze 1,1-diarylethylene oxabenzonorbomadiene