title: Synthesis of copper graphene materials functionalized by amino acids and their catalytic applications.
abstract: 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.
authors: Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University , Nanchong, Sichuan 637002, People's Republic of China.
authors: Qiang
authors: Q
authors: Huang
authors: Limei
authors: L
authors: Zhou
authors: Xiaohui
authors: X
authors: Jiang
authors: Yafen
authors: Y
authors: Zhou
authors: Hongwei
authors: H
authors: Fan
authors: Wencheng
authors: W
authors: Lang