Supported single-metal atom catalysts (SACs) are constituted of isolated active metal centers, which are heterogenized on inert supports such as graphene, porous carbon, and metal oxides. Their thermal stability, electronic properties, and catalytic activities can be controlled via interactions between the single-metal atom center and neighboring heteroatoms such as nitrogen, oxygen, and sulfur. Due to the atomic dispersion of the active catalytic centers, the amount of metal required for catalysis can be decreased, thus offering new possibilities to control the selectivity of a given transformation as well as to improve catalyst turnover frequencies and turnover numbers. This review aims to comprehensively summarize the synthesis of Fe-SACs with a focus on anchoring single atoms (SA) on carbon/graphene supports. The characterization of these advanced materials using various spectroscopic techniques and their applications in diverse research areas are described. When applicable, mechanistic investigations conducted to understand the specific behavior of Fe-SACs-based catalysts are highlighted, including the use of theoretical models. CONTENTS 1. Introduction 13620 2. Scope of This Review 13623 3. Synthesis of Fe-SACs 13623 3.1. N-Doped Graphene-Based Fe-SACs 13623 3.2. Nitrogen-Doped Porous Carbon-Based Fe-SACs 13626 3.3. C 3 N 4 -Based Fe-SACs 13634 4.
In recent years, several scientists have captivated the massive attention for effective and potential designing of nanomaterials catalysts for their advanced applications. Also focused on sustainable approach for the development...
A series of dihydropyrimidone derivatives was synthesized by an efficient, simple and solvent less green method by using Beginelli reaction. Various aromatic aldehydes, urea and ethyl acetoacetate were refluxed for a few hours and the reaction monitored by periodic TLC (hexane: ethyl acetate 6:4 v/v) and products are purified by recrystallization, with characterization by FTIR, 1H NMR. All the purified compounds were subjected to evaluatation by in vitro human breast cancer cell line MDA-MB-231 and MCF-7. Compound I-k was found to be moderately active against MCF-7 with GI 50 value of -4.38.
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