4.7 Article

Decorated palladium nanoparticles on chitosan/δ-FeOOH microspheres: A highly active and recyclable catalyst for Suzuki coupling reaction and cyanation of aryl halides

Journal

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 174, Issue -, Pages 120-133

Publisher

ELSEVIER
DOI: 10.1016/j.ijbiomac.2021.01.162

Keywords

Chitosan; delta-FeOOH; Palladium; Nanocatalyst

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In this study, Pd NPs@CS/delta-FeOOH microspheres were successfully synthesized and employed as efficient catalysts for the synthesis of biaryl and benzonitriles, showing rapid reaction rates and high yields. Furthermore, the catalyst can be easily recycled and reused multiple times.
In this study, an eco-friendly and low cost magnetic nanocomposite consisting of chitosan/delta-FeOOH microspheres (CS/delta-FeOOH) was fabricated as a stabilizer by using a simple method. Pd nanoparticles (Pd NPs) were decorated on the designed CS/delta-FeOOH , and the resulting Pd NPs@CS/delta-FeOOH microspheres were employed as a heterogeneous catalyst in the construction of biaryl and benzonitriles. Pd NPs@CS/delta-FeOOH microspheres efficiently catalyzed the conversion of aryl iodides and bromides to the desired biaryls within 3 h. Moreover, Pd NPs@CS/delta-FeOOH microspheres showed high catalytic potential against synthesis of benzonitriles by providing yields up to of 99% within 4 h. More importantly, it was proved that Pd NPs@CS/delta-FeOOH microspheres were able to be easily recycled and reused up to eight runs for both reactions. This study reveals that Pd NPs@CS/delta-FeOOH microspheres are useful and recyclable nanocatalysts, which catalyze the synthesis of biaryl and benzonitriles with good reaction yields. (C) 2021 Elsevier B.V. All rights reserved.

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