Synthesis of recoverable palladium composite as an efficient catalyst for the reduction of nitroarene compounds and Suzuki cross-coupling reactions using sepiolite clay and magnetic nanoparticles (Fe₃O₄@sepiolite-Pd²⁺) - 21/01/19

Doi : 10.1016/j.crci.2018.07.008

Ehsan Ghonchepour ^a,^⁎ , Mohammad Reza Islami ^a,^⁎ , Behjat Bananezhad ^a, Hamid Mostafavi ^b, Ahmad Momeni Tikdari ^a
^a Department of Chemistry, Shahid Bahonar University of Kerman, 22 Bahman Avenue, 76169 Kerman, Iran
^b Kerman Agricultural and Natural Resource Research and Education Center, AREEO, Kerman, Iran

^∗Corresponding author.^∗∗Corresponding author.

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Abstract

Clays are nontoxic, inexpensive, abundant, and have great potential as catalytic carriers because of their special structure, surface, and suitability for supporting transition metals. In this study, sepiolite was used as a ligand for the heterogenization of palladium chloride on Fe₃O₄ nanoparticle surface as a novel, high temperature stable, and recoverable green catalyst (Fe₃O₄@sepiolite-Pd²⁺). The catalytic activity of this system was tested in the reduction of nitroarene compounds and the Suzuki cross-coupling reaction. The catalyst structure was characterized using spectroscopic data and magnetic and thermal techniques such as Fourier transform infrared, scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction, vibrating sample magnetometer (VSM), and thermogravimetric analysis.

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Keywords : Palladium, Sepiolite clay, Magnetic nanoparticles, Heterogenization, C-C coupling, Green catalyst, Suzuki reaction

Plan

Introduction

Experimental section

Chemicals

Preparation of sepiolite-coated magnetic nanoparticles (Fe₃O₄@sepiolite)

Synthesis of palladium ion encapsulated with sepiolite-coated magnetic nanoparticles (Fe₃O₄@sepiolite-Pd²⁺)

General procedure for reduction of nitroarenes in the presence of Fe₃O₄@sepiolite-Pd²⁺

General procedure for the Suzuki coupling reaction in the presence of Fe₃O₄@sepiolite-Pd²⁺

Results and discussion

Characterization of Fe₃O₄@sepiolite-Pd²⁺

Conclusions

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Vol 22 - N° 1

P. 84-95 - janvier 2019 Retour au numéro

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Synthesis of recoverable palladium composite as an efficient catalyst for the reduction of nitroarene compounds and Suzuki cross-coupling reactions using sepiolite clay and magnetic nanoparticles (Fe₃O₄@sepiolite-Pd²⁺) - 21/01/19

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