1 research outputs found
Synthesis of Copper Graphene Materials Functionalized by Amino Acids and Their Catalytic Applications
Graphene
oxide and its derivative have attracted extensive interests in many
fields, including catalytic chemistry, organic synthesis, and electrochemistry,
recently. We explored whether the use of graphene after chemical modification
with amino acids to immobilize copper nanoparticles could achieve
a more excellent catalytic activity for N-arylation reactions. A facile
and novel method to prepare copper supported on amino-acid-grafted
graphene hybrid materials (A–G–Cu) was first reported.
The as-prepared hybrid materials were characterized by a variety of
techniques, including Fourier transform infrared spectroscopy, X-ray
photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy,
atomic force microscopy, transmission electron microscopy, and inductively
coupled plasma–atomic emission spectrometry. The results showed
that the morphology, distribution, and loading of copper nanoparticles
could be well-adjusted by controlling the type of amino acids grafted
on graphene. Moreover, most A–G–Cu hybrid materials
could catalyze N-arylation of imidazole with iodobenzene with yields
more than 90%, while the copper supported on graphene (G–Cu)
displayed a yield of just 65.8%. The high activity of A–G–Cu
can be ascribed to the good synergistic effects of copper nanoparticles
(Cu NPs) and amino-acid-grafted graphene