Synthesis and Characterization of Fe3O4@SiO2@APIDSO3H as a Novel and Efficient Magnetic Nanocatalyst in Pechmann Condensation

• Published in: Applied organometallic chemistry 2024-12, Vol.38 (12), p.n/a
• Main Authors: Aghashiri, Zohre, Ghassamipour, Soheila, Jamalian, Arezu, Emadi, Masoomeh
• Format: Article
• Language: English
• Subjects: Catalysts; Catalytic activity; Chemical synthesis; Condensates; coumarins; Electron microscopy; Fourier transforms; Infrared spectroscopy; Iron oxides; magnetic nanocatalyst; Pechmann; Silicon dioxide; Sulfonic acid; Thermogravimetric analysis
• ISSN: 0268-2605; 1099-0739
• DOI: 10.1002/aoc.7716

ABSTRACT Fe3O4@APIDSO3H as a novel and magical magnetic nanocatalyst was designed, synthesized, and characterized by different spectroscopic techniques such as Fourier transform infrared (FT‐IR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), x‐ray diffraction (XRD), energy‐dispersive x‐ray (EDX), thermogravimetric analysis (TGA), and vibrating sample magnetometer (VSM). The loading percentage of sulfonic acid on the magnetic nano catalyst was calculated using CHNS analysis. Then, the potential use of it was investigated for the synthesis of various coumarins by Pechmann condensation. The corresponding products were synthesized and isolated in 60%–99% yields. The catalyst was recycled and reused for four times without loss in catalytic activity. In this work, a magnetic heterogenous sulfonic acid was synthesized by adding isatin to the magnetic core–shell as an organic cover, and then chlorosulfonic acid was added. After the characterization and confirmation of its structure, this acid was used as a magnetic nanocatalyst for the synthesis of coumarins by Pechmann condensation. Improvement of reaction time, increasing of yields, relatively mild reaction conditions, ease of isolation of catalyst, and recovery and reusability were some of advantages of this research.