In this research, the synthesis route of ZnCr-layered double hydroxides functionalized with poly(p-phenylenediamine) and Cu(II) was described. LDHs@PpPDA@Cu was synthesized as a novel, green, and recyclable catalyst and characterized by various techniques including Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetry analysis, X-ray diffraction, and energy dispersive X-ray analysis. The catalytic activity of the LDHs@PpPDA@Cu was investigated in the synthesis of pyrrole derivatives via one-pot four-component coupling of amine, aldehyde, nitromethane and acetylacetone. The results of analyses demonstrated that the reactions proceeded to completion which has led to the successful synthesis of high purity compounds.

中文翻译：

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层状双氢氧化物@聚对苯二胺@Cu作为合成吡咯衍生物的新型催化剂：制备与表征

在这项研究中，描述了用聚对苯二胺和Cu（II）功能化的ZnCr层状双氢氧化物的合成路线。LDHs @ PpPDA @ Cu是一种新颖，绿色，可回收的催化剂，并通过多种技术进行了表征，包括傅立叶变换红外光谱，扫描电子显微镜，热重分析，X射线衍射和能量色散X射线分析。通过胺，醛，硝基甲烷和乙酰丙酮的一锅四组分偶联，在吡咯衍生物的合成中研究了LDHs @ PpPDA @ Cu的催化活性。分析结果表明，反应进行到完全，从而成功地合成了高纯度化合物。