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Cu@Fe3O4-TiO2-L-dopa: A novel and magnetic catalyst for the Chan-Lam cross-coupling reaction in ligand free conditions
被引:35
|作者:
Sharma, Harsha
[1
]
Mahajan, Hitesh
[1
]
Jamwal, Babita
[1
]
Paul, Satya
[1
]
机构:
[1] Univ Jammu, Dept Chem, Jammu 180006, India
关键词:
Magnetic nanoparticles;
TiO2;
nanoparticles;
Agglomeration;
Leaching;
L-dopa;
Chan-Lam cross-coupling reaction;
CHEMOSELECTIVE N-ARYLATION;
ARYLBORONIC ACIDS;
C-N;
ROOM-TEMPERATURE;
FACILE SYNTHESIS;
HOLLOW SPHERES;
COPPER;
NANOPARTICLES;
IMIDAZOLES;
AMINES;
D O I:
10.1016/j.catcom.2018.01.016
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
A novel and magnetic Cu(0) catalyst (Cu@Fe3O4-TiO2-L-dopa) has been prepared and characterized with different techniques, such as SEM, HR-TEM, ICP-AES, XRD, FTIR, EDX, CHN analysis, VSM and TGA studies. TiO2 nanoparticles were proved to be efficient in stabilizing magnetite nanoparticles, thus preventing their agglomeration. It has been also observed that grafting of Fe3O4-TiO2 with L-dopa reduces the leaching of Cu(0) nanoparticles. The synthesized catalyst showed excellent catalytic activity for the Chan-Lam cross-coupling reaction of phenyl boronic acid with different substituted anilines in ligand-free conditions, and was found to be recyclable up to 6 runs without loss of significant activity.
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页码:68 / 73
页数:6
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