Palygorskite-Mn(II): An efficient and recyclable heterogeneous catalyst for the synthesis of quinolines

IF 5.3 2区 地球科学 Q2 CHEMISTRY, PHYSICAL Applied Clay Science Pub Date : 2024-08-01 DOI:10.1016/j.clay.2024.107518
Penghui Zhang , Shang Wu , Jiajia Wang , Jincai Yang , Ningning Wang , Fenping Yin , Xiaoming Xiang , Quanlu Yang
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Abstract

A green and high efficient heterogeneous catalysts, palygorskite supported NNN-pincer manganese complexes, were prepared. The prepared catalyst were characterized by scanning transmission electron microscopy (SEM), Fourier infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and Brunauer-Emmet-Teller (BET). The results showed that the catalyst were successfully prepared and the structure of palygorskite was still retained. The catalyst displayed outstanding activity for the reaction of 2-aminobenzyl alcohol and secondary alcohols without additional additives, and the corresponding quinolines were obtained in good to excellent yields with a wide scope of substrate tolerance. More importantly, the novel and stable catalysts could be recycled five consecutive times with a little decrease of the catalytic activity. It provides a new strategy for the design heterogeneous catalysts based on the natural clay mineral.

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alygorskite-Mn(II):合成喹啉类化合物的高效可循环异相催化剂
制备了一种绿色高效的异相催化剂--鳞片矿支撑的 NNN-钳形锰络合物。通过扫描透射电子显微镜(SEM)、傅立叶红外光谱(FTIR)、X 射线衍射(XRD)、X 射线光电子能谱(XPS)、热重分析(TGA)和布鲁诺-艾美特-泰勒(BET)对制备的催化剂进行了表征。结果表明,催化剂制备成功,且仍保留了钙钛矿的结构。该催化剂在 2-氨基苄醇和仲醇的反应中表现出了优异的活性,并且在底物耐受性较宽的情况下获得了相应的喹啉类化合物,产率从良好到极佳。更重要的是,这种新型稳定催化剂可连续循环使用五次,且催化活性略有降低。这为基于天然粘土矿物设计异相催化剂提供了一种新策略。
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来源期刊
Applied Clay Science
Applied Clay Science 地学-矿物学
CiteScore
10.30
自引率
10.70%
发文量
289
审稿时长
39 days
期刊介绍: Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...
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