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Copper(II) complex intercalated graphene oxide nanocomposites as versatile, reusable catalysts for click reaction
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2020-09-15 , DOI: 10.1002/aoc.6017
Angel Green Samuel 1 , Karthikeyan Nagarajan 1, 2 , Karthick Cidhuraj 1 , Bhalerao Gopal 3 , Sujay Chakravarty 3 , Varadharajaperumal Selvaraj 4 , Emmanuvel Lourdusamy 1 , Jebasingh Bhagavathsingh 1
Affiliation  

In this work, we report the efficient, high stable copper(II) complexes intercalated graphene oxide (GO) used as green catalysts for copper(II) complex mediated click reaction. Copper(II) Bis(2,2′‐bipyridine) [CuII (bpy)2] (C1) and Copper(II) Bis(1,10‐phenanthroline) [CuII (phen)2] (C2) have synthesized for the intercalation of corresponding nanocomposites with GO, [GO@CuII (bpy)2] (GO‐C1) and [GO@CuII (phen)2] (GO‐C2). The noncovalent interaction of complexes supported on the surface of the GO nanosheets proves as an evident active site to facilitate the enhanced catalytic activity of copper‐catalyzed alkyne azide cycloaddition (CuIIAAC) reaction for the isolation of 1,4‐disubstituted‐1,2,3‐triazoles as click products in shorter reaction time with 80%–91% yield (five examples). The X‐ray diffraction (XRD) pattern of these composites shows the enhanced interlayers d‐spacing range of 1.01–1.12 nm due to the intercalation of copper(II) complexes in between the GO basal planes and characterized by X‐ray photoelectron spectroscopy (XPS), Fourier‐transform infrared spectroscopy (FT‐IR), Raman, UV, scanning electron microscope (SEM), and thermogravimetric analysis (TGA). The as‐prepared nanocomposites were employed for the typical click reactions using the substrates of azide and acetylene. These classes of composite materials can be referred to recyclable, heterogeneous, green catalysts with high atom economy and could also be used for the isolation of click products in biomolecules.

中文翻译:

铜(II)复杂插层氧化石墨烯纳米复合材料,可作为多用途,可重复使用的点击反应催化剂

在这项工作中,我们报告了高效,高稳定性的铜(II)配合物插入的氧化石墨烯(GO),用作铜(II)配合物介导的点击反应的绿色催化剂。铜(II)(2,2'-联吡啶)[Cu II(bpy)2 ](C1)和铜(II)(1,10-菲咯啉)[Cu II(phen)2 ](C2)已合成用于GO,[GO @ Cu II(bpy)2 ](GO-C1)和[GO @ Cu II(phen)2 ]插入相应的纳米复合材料](GO-C2)。事实证明,GO纳米片表面上负载的络合物的非共价相互作用是促进铜催化的炔叠氮化物环加成(Cu II AAC)反应增强1,3,4-二取代-1, 2,3-三唑作为单击产物,可在更短的反应时间内完成,产率为80%–91%(五个示例)。这些复合材料的X射线衍射(XRD)图显示了增强的中间层d由于GO基面之间插入了铜(II)配合物,并通过X射线光电子能谱(XPS),傅里叶变换红外光谱(FT-IR),拉曼光谱,UV表征,间距范围为1.01-1.12 nm ,扫描电子显微镜(SEM)和热重分析(TGA)。制备的纳米复合材料用于使用叠氮化物和乙炔的底物进行的典型点击反应。这些类型的复合材料可以被称为具有高原子经济性的可循环使用的非均相绿色催化剂,也可以用于分离生物分子中的点击产物。
更新日期:2020-11-06
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