Core-shell structure LiNi0.8Co0.1Mn0.1O2 cathode material with improved electrochemical performance at high voltage
作者：
Song, Liubin;Jiang, Peng;Xiao, Zhongliang* ;Cao, Zhong;Zhou, Chenfeng;...
期刊：
Ionics ,2021年27(3):949-959 ISSN：0947-7047
通讯作者：
Xiao, Zhongliang
作者机构：
[Liu, Pei; Du, Jianlian; Zhou, Chenfeng; Jiang, Peng; Xiao, Zhongliang; Song, Liubin; Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Food Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Xiao, Zhongliang] C;Changsha Univ Sci & Technol, Sch Chem & Food Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.
关键词：
Cathode materials;Cathodes;Lithium compounds;Lithium-ion batteries;Manganese compounds;Morphology;Nickel compounds;Precipitation (chemical);Capacity retention;Coprecipitation method;Core shell structure;Electrochemical performance;Elemental compositions;Exothermic temperature;Homogeneous materials;Lithium-ion battery cathodes;Shells (structures)
摘要：
The design of Ni-rich core and Mn-rich shell is of great significance for improving the electrochemical performance of lithium-ion battery cathode materials at high voltage. The core-shell structure LiNi0.8Co0.1Mn0.1O2 (CS-NCM811) cathode materials is prepared through co-precipitation method. XRD shows that the cathode materials have α-NaFeO2 layered structure and SEM images show that the material has a good morphology. The elemental compositions in Ni, Co, and Mn of both the core and shell of the CS-NCM811 particles are analyzed by EDS. The electrochemical performance results show that the CS-NCM811 provides better cycling stability than the homogeneous. The capacity retention rate of CS-NCM811 at 3 C is significantly higher than that of homogeneous materials at 4.6V. The change in morphology after 100cycles proves that the core-shell structure can inhibit the side reaction and reduce polarization. In addition, the CS-NCM811 has better thermal stability with high exothermic temperature and low heat. © 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH, DE part of Springer Nature.
语种：
英文
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Aryl acyl peroxides for visible-light induced decarboxylative arylation of quinoxalin-2(1H)-ones under additive-, metal catalyst-, and external photosensitizer-free and ambient conditions
作者：
Xie, Long-Yong;Peng, Sha;Yang, Li-Hua;Peng, Cun;Lin, Ying-Wu;...
期刊：
Green Chemistry ,2021年23(1):374-378 ISSN：1463-9262
通讯作者：
He, Wei-Min
作者机构：
[Yang, Li-Hua; He, Wei-Min; Xie, Long-Yong; Peng, Sha; Peng, Cun] Hunan Univ Sci & Engn, Dept Chem & Bioengn, Yongzhou 425100, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Yu, Xianyong] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China.;[Peng, Yu-Yu; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
通讯机构：
[He, Wei-Min] H;Hunan Univ Sci & Engn, Dept Chem & Bioengn, Yongzhou 425100, Peoples R China.
摘要：
Aryl radicals were generated for the first time from cheap and easily available aryl acyl peroxides in eco-friendly ethyl acetate under ambient conditions and visible-light illumination in the absence of any additive, metal catalyst, or external photosensitizer. The present arylation of quinoxalin-2(1H)-ones was chemo- and regioselective, and provided good access to various 3-arylquinoxalin-2(1H)-ones. This journal is © The Royal Society of Chemistry.
语种：
英文
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Visible‐Light‐Initiated Cascade Reaction of 2‐Isothiocyanatonaphthalenes and Amines under Additive‐ and External Photocatalyst‐Free and Mild Conditions
作者：
Bao, Wen-Hu;Wang, Zheng;Cao, Zhong;Wang, Xin-Chang;Ma, Xin-Ran;...
期刊：
ADVANCED SYNTHESIS & CATALYSIS ,2021年363(3):757-761 ISSN：1615-4150
通讯作者：
He, Wei-Min
作者机构：
[Bao, Wen-Hu; Wang, Zheng; He, Wei-Min; Wang, Xin-Chang; Ma, Xin-Ran] Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.;[Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;[Yu, Xian-Yong] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China.
通讯机构：
[He, Wei-Min] H;Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.
关键词：
photocatalyst-free;radical cascade reaction;visible-light;metal-free;photocatalysis
摘要：
A simple and efficient visible-light-initiated cascade reaction of 2-isothiocyanatonaphthalenes and amines with ambient dioxygen as the sole oxidant under additive-, external photocatalyst-free and ambient conditions was developed. 38 Examples of N-substituted naphtho[2,1-d]thiazol-2-amines were regioselectively constructed in good to excellent yields.
语种：
英文
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Practical and sustainable approach for clean preparation of 5-organylselanyl uracils
作者：
Chen, Jin-Yang;Zhong, Chun-Tao;Gui, Qing-Wen;Zhou, Yuan-Ming;Fang, Yang-Yang;...
期刊：
中国化学快报：英文版 ,2021年32(1):475-479 ISSN：1001-8417
通讯作者：
He, Wei-Min
作者机构：
[Zhong, Chun-Tao; Fang, Yang-Yang; Chen, Jin-Yang; Zhou, Yuan-Ming] Yangtze Normal Univ, Coll Chem & Chem Engn, Chongqing 408000, Peoples R China.;[Liu, Kai-Jian; He, Wei-Min] Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.;[Gui, Qing-Wen; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[He, Wei-Min] H;Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.
关键词：
Selenylation;Electrochemistry;Diorganyl diselenides;Atom-economy;Recyclability
摘要：
An eco-friendly,sustainable and practical method for the efficient preparation of 5-organylselanyl uracils through the electrochemical selenylation of uracils and dio rganyl diselenides at room temperature under oxidant-and external electrolvte-free conditions was developed.
语种：
英文
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Dietary L-glutamine supplementation modulates microbial community and activates innate immunity in the mouse intestine (vol 46, pg 2403, 2014)
作者：
Ren, Wenkai;Duan, Jielin;Yin, Jie;Liu, Gang;Cao, Zhong;...
期刊：
Amino Acids ,2021年53(2):319-319 ISSN：0939-4451
通讯作者：
Xiong, Xia
作者机构：
[Liu, Gang; Yin, Jie; Ren, Wenkai; Duan, Jielin; Chen, Shuai; Xiong, Xia; Li, Tiejun; Yin, Yulong] Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Sci Observing & Expt Stn Anim Nutr & Feed Sci Sou, Minist Agr,Inst Subtrop Agr,Hunan Prov Engn Res C, Changsha 410125, Hunan, Peoples R China.;[Liu, Gang; Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Peoples R China.;[Hou, Yongqing; Wu, Guoyao; Yin, Yulong] Wuhan Polytech Univ, Hubei Collaborat Innovat Ctr Anim Nutr & Feed Saf, Hubei Key Lab Anim Nutr & Feed Sci, Wuhan 430023, Peoples R China.;[Wu, Guoyao] Texas A&M Univ, Dept Anim Sci, College Stn, TX 77843 USA.
通讯机构：
[Xiong, Xia] C;Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Sci Observing & Expt Stn Anim Nutr & Feed Sci Sou, Minist Agr,Inst Subtrop Agr,Hunan Prov Engn Res C, Changsha 410125, Hunan, Peoples R China.
摘要：
In the published article, the images for Actin in Figs. 4a, 5a, 6a, and 6c were incorrectly presented.
语种：
英文
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Synergistic cooperative effect of CF3SO2Na and bis(2-butoxyethyl)ether towards selective oxygenation of sulfides with molecular oxygen under visible-light irradiation
作者：
Liu, Kai-Jian;Wang, Zheng;Lu, Ling-Hui;Chen, Jin-Yang;Zeng, Fei;...
期刊：
Green Chemistry ,2021年23(1):496-500 ISSN：1463-9262
通讯作者：
He, Wei-Min
作者机构：
[Zeng, Fei; Liu, Kai-Jian; Wang, Zheng; He, Wei-Min; Lu, Ling-Hui] Hunan Univ Sci & Engn, Dept Chem & Bioengn, Yongzhou 425100, Peoples R China.;[Lin, Ying-Wu; Chen, Jin-Yang] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Duns, Changsha 410114, Peoples R China.;[Yu, Xianyong] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China.
通讯机构：
[He, Wei-Min] H;Hunan Univ Sci & Engn, Dept Chem & Bioengn, Yongzhou 425100, Peoples R China.
摘要：
A safe, practical and eco-friendly method for the switchable synthesis of sulfoxides and sulfones through visible-light-initiated oxygenation of sulfides at ambient temperature under transition-metal-, additives-free and minimal solvent conditions. The synergistic catalytic efforts between CF3SO2Na and 2-butoxyethyl ether represents the key promoting factor for the reaction. This journal is © The Royal Society of Chemistry.
语种：
英文
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An electrochemical impedimetric sensing platform based on a peptide aptamer identified by high-throughput molecular docking for sensitive l-arginine detection
作者：
He, Yumin;Zhou, Li;Deng, Lei;Feng, Zemeng* ;Cao, Zhong;...
期刊：
Bioelectrochemistry ,2021年137:107634 ISSN：1567-5394
通讯作者：
Feng, Zemeng
作者机构：
[He, Yumin; Yin, Yulong; Feng, Zemeng] Chinese Acad Sci, Hunan Prov Key Lab Anim Nutr Physiol & Metab Proc, Hunan Prov Engn Res Ctr Hlth Livestock & Poultry, Inst Subtrop Agr,Minist Agr,Key Lab Agroecol Proc, Changsha 410125, Hunan, Peoples R China.;[Zhou, Li; Cao, Zhong] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Collaborat Innovat Ctr Micro Nano Biosensing & Fo, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410004, Hunan, Peoples R China.;[He, Yumin; Yin, Yulong] Hunan Normal Univ, Coll Life Sci, Anim Nutr & Human Hlth Lab, Changsha 410081, Hunan, Peoples R China.;[Deng, Lei] Cent South Univ, Sch Comp Sci & Engn, Changsha 410075, Peoples R China.
通讯机构：
[Feng, Zemeng] C;Chinese Acad Sci, Hunan Prov Key Lab Anim Nutr Physiol & Metab Proc, Hunan Prov Engn Res Ctr Hlth Livestock & Poultry, Inst Subtrop Agr,Minist Agr,Key Lab Agroecol Proc, Changsha 410125, Hunan, Peoples R China.
关键词：
Peptide aptamer;Docking;L-Arg;Biosensor;EIS;Isothermal titration calorimetry
摘要：
As a primary building block for protein synthesis, L-arginine (L-Arg) is also a precursor for the synthesis of important metabolites, and is involved in various physiological and pathophysiological processes. L-Arg is a potential biomarker in clinical diagnosis and nutritional status assessment, making it valuable to quantify and monitor this biomolecule. In this study, peptide aptamers that specifically interact with L-Arg were identified by high-throughput molecular docking, and the binding capacities between the synthesized peptide aptamers and L-Arg were then measured by isothermal titration calorimetry. We hypothesized that the peptide aptamer with the greatest binding capacity could be used as the recognition element in a biosensor. A chemosynthetic peptide aptamer modified with mercaptan and spacer units (thioctic acid-GGGG-FGHIHEGY) was thus used to construct label-free electrochemical impedimetric biosensors for L-Arg based on gold electrodes. The optimum biosensor showed good sensitivity to L-Arg with a linear range of 0.1 pM-0.1 mM, and the calculated limit of detection (three times the signal-to-noise ratio) was 0.01 pM. Interference studies and assays of diluted serum samples were also carried out, and satisfactory results obtained. In conclusion, a potential method of peptide aptamer screening and biosensor fabrication for detecting small biological molecules was demonstrated. (C) 2020 Elsevier B.V. All rights reserved.
语种：
英文
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富镍锂离子电池三元材料NCM 的研究进展
作者：
肖忠良;周乘风;宋刘斌;曹忠;蒋鹏
期刊：
化工进展 ,2020年39(1):216-223 ISSN：1000-6613
通讯作者：
Song, Liubin(kjcsongliubin@163.com)
作者机构：
[肖忠良; 周乘风; 宋刘斌; 曹忠; 蒋鹏] Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, School of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha;Hunan;410114, China;[肖忠良; 周乘风; 宋刘斌; 曹忠; 蒋鹏] Hunan;[肖忠良; 周乘风; 宋刘斌; 曹忠; 蒋鹏] 410114, China
关键词：
锂离子电池;富镍;电化学;动力学;热力学
摘要：
锂离子电池作为新能源电池符合时代要求,具有良好的应用前景。电池容量、倍率性能与循环性能是电池性能的重要评价指标,在选取高能量密度电极材料的同时要充分考虑电池结构稳定性及其安全性能,三元材料基于这种思路进行设计。目前,针对电池中锂离子导通率与结构不可逆坍塌问题,通过包覆涂层、离子掺杂等手段改善锂离子电池性能已经常态化,实际需求要求有更有效的改性方法。因此,本文综述了富镍锂离子电池三元材料LiNi_(0.4)Co_(0.2)Mn_(0.4)O_2(NCM424)、LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2(NCM523)、LiNi_(0.6)Co_(0.2)Mn_(0.2)O_2(NCM622)和LiNi_(0.8)Co_(0.1)Mn_(0.1)O_2 (NCM811)的研究现状与发展导向,认为简单的单一材料改性已遇到瓶颈,改性方法复合、设计材料多元结构是提升电池性能的一大发展方向;从改性材料的合成和运行路径入手,研究分子水平上的作用机制,建立统一理论模型,通过计算模拟手段设计电极结构,实现锂离子电池突破性的发展。
语种：
中文
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Selective oxidation of (hetero)sulfides with molecular oxygen under clean conditions
作者：
Liu, Kai-Jian;Deng, Ji-Hui;Yang, Jie;Gong, Shao-Feng;Lin, Ying-Wu;...
期刊：
Green Chemistry ,2020年22(2):433-438 ISSN：1463-9262
通讯作者：
He, Wei-Min
作者机构：
[Liu, Kai-Jian; He, Wei-Min; Yang, Jie; Gong, Shao-Feng; Deng, Ji-Hui] Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[He, Jun-Yi; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
通讯机构：
[He, Wei-Min] H;Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.
摘要：
The development of eco-friendly and switchable catalytic systems for the conversion of a sole raw-material into distinct high-value products is a particularly attractive concept and a daunting synthetic challenge. In the present work, the first example of efficient and selective oxidation of sulfides to sulfones and sulfoxides using molecular oxygen under clean conditions was established. © The Royal Society of Chemistry.
语种：
英文
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VISIBLE-LIGHT-INDUCED DECARBOXYLATIVE ACYLATION OF QUINOXALIN-2(1H )-ONES WITH ?-OXO CARBOXYLIC ACIDS UNDER METAL-, STRONG OXIDANT- AND EXTERNAL PHOTOCATALYST-FREE CONDITIONS
作者：
Xie, Long-Yong;Bai, You-Shu;Xu, Xiang-Qin;Peng, Xia;Tang, Hai-Shan;...
期刊：
Green Chemistry ,2020年22(5):1720-1725 ISSN：1463-9262
通讯作者：
He, Wei-Min
作者机构：
[Bai, You-Shu; He, Wei-Min; Tang, Hai-Shan; Xu, Xiang-Qin; Peng, Xia; Xie, Long-Yong] Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.;[Huang, Ying; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[He, Wei-Min] H;Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.
摘要：
A mild and eco-friendly visible-light-induced decarboxylative acylation of quinoxalin-2(1H)-ones and α-oxo carboxylic acids with ambient air as the sole oxidant at room temperature was established. The reaction proceeded efficiently without any metal catalysts, strong oxidants or external-photosensitizers, ultimately reducing the generation of waste. This journal is © The Royal Society of Chemistry.
语种：
英文
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可见光催化喹喔啉-2(1H)-酮与醇C(sp~2)–H/O–H交叉脱氢偶联反应
作者：
Xie, Long-Yong;Liu, Yi-Shu;Ding, Hong-Ru;Gong, Shao-Feng;Tan, Jia-Xi;...
期刊：
催化学报 ,2020年41(8):1168-1173 ISSN：0253-9837
通讯作者：
He, Wei-Min
作者机构：
[Ding, Hong-Ru; He, Wei-Min; Gong, Shao-Feng; Liu, Yi-Shu; Xie, Long-Yong] Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Hunan, Peoples R China.;[He, Jun-Yi; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Hunan, Peoples R China.;[Tan, Jia-Xi] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Hunan, Peoples R China.
通讯机构：
[He, Wei-Min] H;Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Hunan, Peoples R China.
关键词：
Quinoxalin-2(1H)-ones;Alcohols;Visible-light photoredox catalysis;Cross-dehydrogenative coupling;Metal free reaction
摘要：
An efficient and practical route to various 3-alkoxylquinoxalin-2(1H)-ones through visible-light photocatalytic C(sp2)−H/O−H cross-dehydrogenation coupling of quinoxalin-2(1H)-ones and alcohols, employing ambient air as an oxidant at room temperature under metal-free conditions, was developed. © 2020 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences
语种：
英文
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Electrochemical Synthesis of α-Ketoamides under Catalyst-, Oxidant-, and Electrolyte-Free Conditions
作者：
Chen, Jin-Yang;Wu, Hong-Yu;Gui, Qing-Wen;Han, Xiao-Ran;Wu, Yan;...
期刊：
Organic Letters ,2020年22(6):2206-2209 ISSN：1523-7060
通讯作者：
He, Wei-Min
作者机构：
[Du, Kui; Han, Xiao-Ran; Wu, Yan; Chen, Jin-Yang; Wu, Hong-Yu] Yangtze Normal Univ, Coll Chem & Chem Engn, Chongqing 408000, Peoples R China.;[Gui, Qing-Wen; He, Wei-Min; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;[Gui, Qing-Wen] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[He, Wei-Min] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
摘要：
A catalyst-, oxidant-, electrolyte-free method for the preparation of α-ketoamides through the direct electrochemical amidation of α-ketoaldehydes and amines with innocuous hydrogen as the sole byproduct at ambient temperature was developed. The present reaction features clean and mild conditions, excellent functional-group tolerance, and high atom economy and scalability, enabling facile applications in pharmaceutical chemistry. Copyright © 2020 American Chemical Society.
语种：
英文
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稀有金属材料钯湿法回收的研究进展
作者：
肖忠良;曾超;刘佩;吴道新;宋刘斌;...
期刊：
功能材料 ,2020年51(11):11008-11016 ISSN：1001-9731
通讯作者：
Song, L.
作者机构：
[肖忠良; 宋刘斌; 曹忠; Zeng C.; 刘佩; 吴道新] Changsha University of Science and Technology, School of Chemistry and Food Engineering, Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation, Changsha, 410114, China
通讯机构：
[Song, L.] C;Changsha University of Science and Technology, China
关键词：
贵金属;钯;吸附材料;回收技术;研究进展
摘要：
从不同废弃物中回收贵金属钯的湿法回收方法,明确了钯回收的重要价值,但存在体系成分复杂,含量极低,且未经处理直接排放,造成资源浪费的问题。湿法回收依据回收过程作用机理的不同,以吸附法、离子交换法、络合-萃取法、沉淀法等进行分类阐述。在4种方法中,吸附法的应用逐渐增加,故以吸附法为主进行详细介绍。吸附材料可分为金属氧化物复合吸附材料、碳基复合吸附材料、MOFs复合吸附材料、生物质复合吸附材料。而复合吸附材料通常以功能性配体与载体通过嫁接法或浸渍法等进行复配合成,因而相对普通的吸附剂具有更高的吸附容量与选择性,且吸附迅速。指出在未来的发展方向中,为推进贵金属钯回收的高选择性、高回收率,吸附法将成为首选,同时可实现回收的绿色环保。
语种：
中文
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Molecular iodine-catalyzed multicomponent synthesis of α-cyanopyrrolines with ambient air as the oxidant under neat conditions
作者：
Gui, Qing-Wen;Teng, Fan;Li, Zhou-Chao;Jin, Xue-Feng;Zhang, Mei;...
期刊：
Organic Chemistry Frontiers ,2020年7(24):4026-4030 ISSN：2052-4110
通讯作者：
He, Wei-Min
作者机构：
[Teng, Fan; Jin, Xue-Feng; Gui, Qing-Wen; Li, Zhou-Chao; Zhang, Mei; Dai, Jia-Ni] Hunan Agr Univ, Coll Chem & Mat Sci, Changsha 410128, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[He, Wei-Min; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
通讯机构：
[He, Wei-Min] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
关键词：
Iodine;Oxidants;Transition metals;Ambient air;Chemo-selectivity;Formamides;Molecular iodine;Multicomponent synthesis;Tandem reaction;Catalysis
摘要：
In this work, a variety of α-cyanopyrrolines were efficiently synthesized from alkenes, TMSCN and N,N-disubstituted formamides via molecular iodine-catalyzed tandem reaction under neat and mild conditions. This method applies ambient air as the sole oxidant and circumvents the use of transition metals and extra solvents to afford a broad range of final products with good regio- A nd chemo-selectivity. © 2020 the Partner Organisations.
语种：
英文
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DSN/TdT recycling digestion based cyclic amplification strategy for microRNA assay
作者：
He, Jing-Lin* ;Mei, Ting-Ting;Tang, Ling;Liao, Shi-Qing;Cao, Zhong*
期刊：
Talanta ,2020年219:121173 ISSN：0039-9140
通讯作者：
He, Jing-Lin;Cao, Zhong
作者机构：
[He, Jing-Lin; Cao, Zhong; Tang, Ling; Liao, Shi-Qing; Mei, Ting-Ting] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Hunan Prov Key Lab Cytochem, Sch Chem & Food Engn, Changsha 410114, Peoples R China.
通讯机构：
[He, JL; Cao, Z] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Hunan Prov Key Lab Cytochem, Sch Chem & Food Engn, Changsha 410114, Peoples R China.
关键词：
Duplex-specific nuclease;Terminal deoxynucleotidyl transferase;MicroRNA;Recycling digestion
摘要：
Sensitive and specific detection of microRNAs (miRNAs) is of great significance for early cancer diagnosis. Here we report a simple and sensitive fluorescence signal amplification strategy that based on DSN/TdT recycling digestion for miRNA detection. DSN initiates DNA digestion on 3′-phosphate-primer/miRNA heteroduplex which causes miRNA recycle. The digested DNA strands with 3′-OH ends enable TdT to synthesize a polydeoxyguanylic tails on the 3′-end. The DNAs with polydeoxyguanylic tails are converted to double-stranded-DNA prior to initiation of DSN/TdT recycling digestion. With the cooperation of TdT and DSN, a new round of digestion and extension is triggered, leading to massive fluorophores separating and signal amplification. The amplification strategy produces large amounts of 3′-OH probes that can be used directly for dsDNA enrichment and DSN digestion. Moreover, both DSN digestion and TdT extension are sequence-independent reaction without the need of complex sequences design. In addition, this strategy is utilized to analyze miRNA samples from MCF-7 cell lysates and Cu (II) ion samples, indicating its potential application in actual sample analysis. The method shows a promising analytical platform for DNA nicking-related studies and tumor biomarkers measuring in clinical diagnostics. © 2020 Elsevier B.V.
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英文
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1,2-Diethoxyethane catalyzed oxidative cleavage of gem-disubstituted aromatic alkenes to ketones under minimal solvent conditions
作者：
Liu, Kai-Jian;Deng, Ji-Hui;Zeng, Tang-Yu;Chen, Xin-Jie;Huang, Ying;...
期刊：
中国化学快报：英文版 ,2020年31(7):1868-1872 ISSN：1001-8417
通讯作者：
He, Wei-Min
作者机构：
[Zeng, Tang-Yu; Liu, Kai-Jian; He, Wei-Min; Deng, Ji-Hui] Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.;[Huang, Ying; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;[Chen, Xin-Jie] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China.;[Lin, Ying-Wu] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[He, Wei-Min] H;Hunan Univ Sci & Engn, Dept Chem, Yongzhou 425100, Peoples R China.
关键词：
Ketone;Oxidation;Ambient air;Oxidative cleavage
摘要：
Aerobic oxidation using pure dioxygen gas as the oxidant has attracted much attention,but its application in synthetic chemistry has been significantly hampered by the complexity of catalytic system and potential risk of high-energy dioxygen gas.By employing 1,2-diethoxyethane as a catalyst and ambient air as an oxidant,an efficient protocol for the construction of various aryl-alkyl and diaryl ketones through oxidative cleavage of gem-disubstituted aromatic alkenes under minimal solvent conditions has been achieved.
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英文
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Intrinsically ESIPT-exhibiting and enhanced emission in polymer nanoparticles as signaling for sensing nitrite.
作者：
Wang, Qinge;He, Lingzhi;Zeng, Dan;Zou, Wu;Gong, Fuchu* ;...
期刊：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY ,2020年226:117654 ISSN：1386-1425
通讯作者：
Gong, Fuchu;Cao, Zhong
作者机构：
[Zou, Wu; Gong, FC; Cao, Zhong; Zeng, Dan; Gong, Fuchu; Wang, Qinge; He, Lingzhi; Xia, Jiaoyun] Changsha Univ Sci & Technol, Coll Chem & Food Engn, Changsha 410114, Hunan, Peoples R China.;[Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[Gong, FC; Cao, Z] C;Changsha Univ Sci & Technol, Coll Chem & Food Engn, Changsha 410114, Hunan, Peoples R China.
关键词：
ESIPT-Exhibiting;NO(2)(-) sensing;Polymer nanoparticles;Tautomeric emission quenching
摘要：
A straightforward approach to the fabrication of intrinsically excited-state intramolecular proton transfer (ESIPT)-fluorescent polymer nanoparticles (e-PNPs) was developed. The e-PNPs were obtained by self-assembly of the homopolymers derived from 4-aminosalicylic acid in aqueous solution. By incorporating ESIPT modules into polymer nanoparticles, the ESIPT reaction can be endowed with moderate hydrophobic micro-environment by nanoparticle scaffolds, eliciting enhanced ESIPT emission. The newly developed e-PNPs exhibit strong tautomeric fluorescence(e-FL), good photostability, low-toxicity and favourable biocompatibility in aqueous solution. Upon the addition of NO2(-), the e-FL can be significantly quenched owing to the reaction of NO2(-) with the amide groups on e-PNPs. From this basis, the fluorescence detection of NO2(-) was implemented, which showed a linear relationship between 0nM and 110nM with a detection limit of 2.3nM. Furthermore, e-PNPs were used as nanoprobes to monitor the NO2(-) levels in HeLa cells by fluorescence imaging, demonstrating the ability of discrimination from different concentrations of NO2(-). The proposed method can be applied to a wide range of other ESIPT modules to integrate into polymer nanoparticles and offer highly sensitive nanosensing platform for bioanalysis and molecular imaging.
语种：
英文
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THE CLEAN PREPARATION OF MULTISUBSTITUTED PYRROLES UNDER METAL- AND SOLVENT-FREE CONDITIONS
作者：
Gui, Qing-Wen;He, Xiaoli;Wang, Wenjing;Zhou, Huilin;Dong, Yumei;...
期刊：
Green Chemistry ,2020年22(1):118-122 ISSN：1463-9262
通讯作者：
He, Wei-Min
作者机构：
[Gui, Qing-Wen; Zhou, Huilin; Wang, Wenjing; Wang, Nengqing; He, Xiaoli; Dong, Yumei] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Tang, Jia-Xi] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China.;[He, Wei-Min; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Hunan, Peoples R China.
通讯机构：
[He, Wei-Min] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Hunan, Peoples R China.
摘要：
A practical and sustainable protocol for the clean preparation of various multisubstituted pyrroles through an iodine-catalyzed multicomponent reaction under metal- A nd solvent-free conditions was developed. In the gram-scale synthesis, the desired pyrroles can be easily isolated in high-purity through simple extraction. © 2019 The Royal Society of Chemistry.
语种：
英文
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Visible-light-initiated malic acid-promoted cascade coupling/ cyclization of aromatic amines and KSCN to 2-aminobenzothiazoles without photocatalyst
作者：
He, Wei-Bao;Gao, Lan-Qing;Chen, Xin-Jie;Wu, Zhi-Lin;Huang, Ying;...
期刊：
中国化学快报：英文版 ,2020年31(7):1895-1898 ISSN：1001-8417
通讯作者：
Xu, Xin-Hua;He, Wei-Min
作者机构：
[He, Wei-Bao; Gao, Lan-Qing; Xu, Xin-Hua] Hunan Univ, Dept Chem, Changsha 410082, Hunan, Peoples R China.;[He, Wei-Min; Huang, Ying; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.;[Chen, Xin-Jie] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Xiangtan 411201, Peoples R China.;[Wu, Zhi-Lin] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Xu, Xin-Hua] H;[He, Wei-Min] C;Hunan Univ, Dept Chem, Changsha 410082, Hunan, Peoples R China.;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
关键词：
Air;Photocatalysis;Cascade reaction;Photocatalyst-free;2-Aminobenzothiazoles
摘要：
By using ambient air as the oxidant and malic acid as the promoter, a practical method for the preparation of 2-aminobenzothiazoles through visible-light-initiated cascade reaction of aromatic amines and KSCN in eco-friendly bis(methoxypropy)ether under metal-, hazardous additive-, photocatalyst-free conditions was established.
语种：
英文
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Ultrasound-assisted tandem synthesis of tri- and tetra-substituted pyrrole-2-carbonitriles from alkenes, TMSCN and N,N-disubstituted formamides
作者：
Gui, Qing-Wen;Teng, Fan;Ying, Sheng-Neng;Liu, Yang;Guo, Tao;...
期刊：
中国化学快报：英文版 ,2020年31(12):3241-3244 ISSN：1001-8417
通讯作者：
He, Wei-Min
作者机构：
[Teng, Fan; Gui, Qing-Wen; Liu, Yang; Ying, Sheng-Neng; Guo, Tao] Hunan Agr Univ, Coll Chem & Mat Sci, Changsha 410128, Peoples R China.;[Tang, Jian-Xin] Hunan Univ Technol, Sch Life Sci & Chem, Zhuzhou 412007, Peoples R China.;[He, Wei-Min; Chen, Jin-Yang; Cao, Zhong] Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
通讯机构：
[He, Wei-Min] C;Changsha Univ Sci & Technol, Hunan Prov Key Lab Mat Protect Elect Power & Tran, Changsha 410114, Peoples R China.
关键词：
Green chemistry;Solvent-free;Tandem reaction;Dual role;Ultrasound
摘要：
An energy-saving and eco-friendly method for the efficient construction of various tri- and tetra-substituted pyrrolecarbonitriles through ultrasound-assisted multicomponent tandem reaction of readily available alkenes, TMSCN and N,N-disubstituted formamides within 40 min under metal-, solvent-free and mild conditions was developed. The dual role of iodine (catalyst and oxidant) notably simplified the reaction conditions and reduced the chemical waste generated (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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英文
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