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Keywords
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Chan–Lam cross‐coupling reaction, heterogeneous nanocatalyst, N‐enriched GO/cu NPs, reusability,
supramolecular polymerization
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Abstract
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Herein, we demonstrate the direct polymerization of melamine and cyanuric
chloride in the surface of graphene oxide (GO) (N‐enriched GO) in order to
develop a new nanocatalyst. The supramolecular polymerized GO acts not only
as a spacer to prevent the restacking of graphene sheets but also as a nitrogen
source to generate active centers for Cu NP attachments. Subsequently, the
nitrogen on the surface of the GO sheets coordinates with copper ions to generate copper nanoparticles. The prepared nanocatalyst was characterized by
Fourier transform infrared spectroscopy, X‐ray powder diffraction, scanning
electron microscopy, energy‐dispersive X‐ray spectroscopy and thermogravimetric analysis. This catalyst showed high efficiency and good activity in the
Chan–Lam cross‐coupling reaction ofN‐heterocycles and aniline derivatives
with high yields in short reaction times. In addition, the nanocatalyst was easily recovered and reused for five consecutive runs without any noticeable loss
of performance.
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