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嵌入层状双氢氧化物的铜（II）席夫碱配合物用于无溶剂条件下乙苯的选择性氧化。

Cu(ii) Schiff base complex intercalated into layered double hydroxide for selective oxidation of ethylbenzene under solvent-free conditions.

作者信息

Kirar Jagat Singh, Khare Savita

机构信息

School of Chemical Sciences, Devi Ahilya University Takshashila Campus, Khandwa Road Indore M. P. 452001 India

出版信息

RSC Adv. 2018 May 23;8(34):18814-18827. doi: 10.1039/c8ra03165g. eCollection 2018 May 22.

DOI:10.1039/c8ra03165g
PMID:35539648
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9080632/
Abstract

A new heterogeneous catalyst was prepared by intercalation of NNOO donor Cu(ii) Schiff base complex derived from 2-hydroxy-1-naphthaldehyde and 4-amino benzoic acid into Zn-Al layered double hydroxide {LDH-[NAPABA-Cu(ii)]}. Synthesized catalyst was characterized by Inductively coupled plasma atomic emission spectroscopy, energy dispersive X-ray analysis, scanning electron microscopy, X-ray diffraction, Transmission electron microscopy, BET surface area, Fourier transform infrared spectroscopy, thermo-gravimetric analysis, electron paramagnetic resonance spectroscopy and diffuse reflectance UV-visible spectroscopy. The catalytic performance of LDH-[NAPABA-Cu(ii)] was studied for the liquid phase solvent-free oxidation of ethylbenzene at 393 K, using -butylhydroperoxide as an oxidant. In oxidation reaction ethylbenzene was oxidized to acetophenone, benzaldehyde and benzoic acid. The major product was acetophenone. A maximum, 80.54% conversion of ethylbenzene was observed after 7 hours. The catalyst was recycled seven times without significant loss of catalytic activity.

摘要

通过将由2-羟基-1-萘甲醛和4-氨基苯甲酸衍生的NNOO供体Cu(ii)席夫碱配合物插入到Zn-Al层状双氢氧化物{LDH-[NAPABA-Cu(ii)]}中，制备了一种新型多相催化剂。采用电感耦合等离子体原子发射光谱、能量色散X射线分析、扫描电子显微镜、X射线衍射、透射电子显微镜、BET比表面积、傅里叶变换红外光谱、热重分析、电子顺磁共振光谱和漫反射紫外可见光谱对合成的催化剂进行了表征。以叔丁基过氧化氢为氧化剂，研究了LDH-[NAPABA-Cu(ii)]在393 K下对乙苯进行液相无溶剂氧化反应的催化性能。在氧化反应中，乙苯被氧化为苯乙酮、苯甲醛和苯甲酸。主要产物是苯乙酮。7小时后，乙苯的转化率最高可达80.54%。该催化剂循环使用了7次，催化活性没有明显损失。

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