Ecologically Sound Syntheses of Imidazoindole Derivatives Mediated by Cu-MCM-41-phen under Room Temperature

IF 2.8 3区材料科学 Q3 CHEMISTRY, PHYSICAL

Silicon Pub Date : 2025-02-14 DOI:10.1007/s12633-025-03238-2

Narmatha Venkatesan, Bharathi Madheswaran, Denzil Britto Christopher Leslee, Jayapratha Gunasekaran, Shanmuga Bharathi Kuppannan

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Abstract

A Copper(II) complex was synthesized using Indolic Schiff base and 1,10 phenanthroline which upon immobilisation on MCM-41 yields selective, efficient and retrievable heterogeneous catalyst through its active site dispersions. The physicochemical properties of the produced catalyst were observed by FT-IR, UV–Vis DRS, PXRD, SEM, EDX, ICP-OES, TEM, N₂ adsorption and desorption, TGA, ¹³C MAS-NMR and XPS. The catalytic efficiency of the synthesized catalyst was tested in the imidazoindole reactions through variety of aldehydes, isatin and ammonium acetate using ethanol as solvent under room temperature for 30 min and found its reusability up to six runs with consistent activity. The catalyst illustrates good to excellent yield for the different substrates including electron donating, electron withdrawing, disubstituted, fused, conjugated, heterocyclic and aliphatic aldehydes.

Graphical Abstract

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室温下Cu-MCM-41-phen介导咪唑吲哚衍生物的生态合成

以吲哚希夫碱和1,10菲罗啉为原料合成了一种铜（II）配合物，该配合物在MCM-41上固定化后，通过其活性位点分散得到了选择性、高效、可回收的多相催化剂。采用FT-IR、UV-Vis DRS、PXRD、SEM、EDX、ICP-OES、TEM、N2吸附和脱附、TGA、13C MAS-NMR和XPS等手段对催化剂的理化性质进行了表征。在室温条件下，以乙醇为溶剂，对合成的催化剂进行了咪唑吲哚与多种醛、isatin和乙酸铵反应30 min的催化效率测试，发现其可重复使用6次，且活性一致。该催化剂对供电子、吸电子、二取代、熔融、共轭、杂环和脂肪族醛等不同底物均有良好的收率。图形抽象

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来源期刊

Silicon CHEMISTRY, PHYSICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

5.90

自引率

20.60%

发文量

685

审稿时长

>12 weeks

期刊介绍： The journal Silicon is intended to serve all those involved in studying the role of silicon as an enabling element in materials science. There are no restrictions on disciplinary boundaries provided the focus is on silicon-based materials or adds significantly to the understanding of such materials. Accordingly, such contributions are welcome in the areas of inorganic and organic chemistry, physics, biology, engineering, nanoscience, environmental science, electronics and optoelectronics, and modeling and theory. Relevant silicon-based materials include, but are not limited to, semiconductors, polymers, composites, ceramics, glasses, coatings, resins, composites, small molecules, and thin films.