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首页> 外文期刊>Catalysis science & technology >Cu-grafted mesoporous organic polymer: a new recyclable nanocatalyst for multi-component, N-arylation and S-arylation reactions
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Cu-grafted mesoporous organic polymer: a new recyclable nanocatalyst for multi-component, N-arylation and S-arylation reactions

机译：Cu移植介孔有机聚合物：一种用于多组分，N-酰化和S-酰化反应的新的可回收纳米催化剂

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A new mesoporous Cu-MPTA-1 nanocatalyst has been synthesized via a simple and facile in situ radical polymerization of triallylamine in the presence of an organic-organic self-assembly of anionic surfactant SDS, followed by grafting of Cu(II) at room temperature under an inert atmosphere. This nanomaterial has been characterized by elemental analysis, powder X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), UV-vis diffuse reflectance spectroscopy (DRS), thermogravimetric analysis (TGA), N2 adsorption-desorption studies. X-ray photoelectron spectroscopy (XPS) and EPR spectroscopy Cu-MPTA-1 acts as an efficient heterogeneous nanocatalyst exhibiting a high catalytic activity for N-arylation and S-arylation reactions using water as a green solvent and also exhibits an excellent catalytic activity for the one-pot synthesis of propargylamines via a three component coupling of an alkyne, an amine and an aldehyde at room temperature. Moreover, the catalyst is easily recoverable and can be reused six times without an appreciable loss of catalytic activity in the three component coupling reaction. The highly dispersed Cu(II) sites in the Cu-grafted mesoporous polymer could be responsible for the observed high activities of the Cu-MPTA-1 catalyst in the coupling reactions. No evidence of leached Cu from the catalyst during the course of the reaction has been observed, suggesting true heterogeneity in the catalytic process.
机译：新的介孔Cu-MPTA-1纳米催化剂已通过在存在有机有机甲基表面活性剂SDS的有机有机体自组装的情况下通过简单且容易的原位原位聚合，然后在室温下在室温下移植Cu（ii）在惰性气氛下。该纳米材料的特征是通过元素分析，粉末X射线衍射（XRD），透射电子显微镜（TEM），傅立叶变换红外光谱（FT-IR），UV-VIS弥散反射光谱（DRS），热力学分析（TGA）（TGA） ，N2吸附 - 吸附研究。 X射线光电子光谱（XPS）和EPR光谱CU-MPTA-1充当有效的异质纳米催化剂，表现出高催化活性，用于使用水作为绿色溶剂的N-酰化和S-酰化反应，并表现出极佳的催化活性通过在室温下的三个成分耦合，胺和醛的三个成分耦合，将propgylamines的一锅合成。此外，催化剂很容易回收，可以重复使用六次，而在三个成分偶联反应中，催化活性的损失明显。 Cu夹式介孔聚合物中高度分散的Cu（II）位点可能是偶联反应中观察到的Cu-MPTA-1催化剂的高活性。在反应过程中，没有观察到催化剂中浸出的Cu的证据，这表明催化过程中的真正异质性。

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