首页> 美国卫生研究院文献>ACS Omega >Unprecedented Concomitant Formation of Cu2O–CDNano-Superstructures During the Aerobic Oxidation ofAlcohols and Their Catalytic Use in the Propargylamination Reaction:A Simultaneous Catalysis and Metal Waste Valorization (SCMWV) Method
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Unprecedented Concomitant Formation of Cu2O–CDNano-Superstructures During the Aerobic Oxidation ofAlcohols and Their Catalytic Use in the Propargylamination Reaction:A Simultaneous Catalysis and Metal Waste Valorization (SCMWV) Method

机译:Cu2O–CD的前所未有的伴随形成有氧氧化过程中的纳米超结构。醇及其在丙炔化反应中的催化作用:同时催化和金属废物平衡(SCMWV)方法

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摘要

Copper–cyclodextrins (CDs)-catalyzed aerobic oxidation of alcohols under aqueous conditions and a concomitant formation of Cu2O–cyclodextrin nano-superstructures (Cu2O–CD nps) during the reaction are reported. The use of affordable copper and cyclodextrin combination for aerobic oxidation precluding organic solvents makes it a benign methodology. Intriguingly, a diverse array of Cu2O–CD nps with unique morphologies was obtained by varying copper salts, cyclodextrins, and bases. The nano-superstructures were characterized by different techniques, such as X-ray diffraction, X-ray photoelectron spectroscopy, differential scanning calorimetry-thermogravimetric analysis, scanning electron microscopy, time of flight secondary-ion mass spectrometry, and transmission electron microscopy to confer their authenticity. Interestingly, the nano-superstructures showed promising catalytic efficiency for a one-pot three-component propargylamination reaction. The used particles were found to be recoverable and recyclable for propargylamination for up to three cycles, with no loss of catalytic activity. Moreover, the concomitant formation of Cu2O–CD nanostructures and their self-segregation during an aerobic oxidationreaction under homogenous conditions is a first-of-its-kind methoddepicting simultaneous catalysis and metal waste valorization (SCMWV).Overall, this new approach of reaping the benefits of homogenous metalcatalysis and simultaneously sequestrating the metal into a high-valueproduct might pave the way to develop many such SCMWV protocols infuture.
机译:据报道,铜-环糊精(CDs)在水性条件下对酒精的需氧氧化以及反应过程中同时形成的Cu2O-环糊精纳米超结构(Cu2O-CD nps)。使用价格可承受的铜和环糊精的组合进行有氧氧化(排除有机溶剂)使其成为一种良性方法。有趣的是,通过改变铜盐,环糊精和碱,获得了具有独特形态的各种Cu2O-CD nps。纳米上层建筑通过不同的技术进行表征,例如X射线衍射,X射线光电子能谱,差示扫描量热法,热重分析,扫描电子显微镜,飞行时间二次离子质谱和透射电子显微镜等真实性。有趣的是,纳米超结构对一锅三组分炔丙基层压反应显示出有希望的催化效率。发现用过的颗粒可回收并可再循环用于炔丙层压多达三个循环,而没有催化活性的损失。此外,在有氧氧化过程中,Cu2O–CD纳米结构的伴随形成及其自分离均质条件下的反应是首创描绘了同时催化和金属废物增值(SCMWV)。总体而言,这种获取均质金属益处的新方法催化并同时将金属螯合成高价值产品可能会为开发许多此类SCMWV协议铺平道路未来。

著录项

  • 期刊名称 ACS Omega
  • 作者

    Rani N. Patil; A. Vijay Kumar; *;

  • 作者单位
  • 年(卷),期 2017(2),10
  • 年度 2017
  • 页码 6405–6414
  • 总页数 10
  • 原文格式 PDF
  • 正文语种
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