Silica coated magnetic NiFe2O4 nanoparticle supported phosphomolybdic acid; synthesis, preparation and its application as a heterogeneous and recyclable catalyst for the one-pot synthesis of tri- and tetra-substituted imidazoles under solvent free conditions

被引:62
作者
Maleki, Behrooz [1 ]
Eshghi, Hossein [2 ]
Khojastehnezhad, Amir [2 ]
Tayebee, Reza [1 ]
Ashrafi, Samaneh Sedigh [1 ]
Kahoo, Golnoosh Esmailian [1 ]
Moeinpour, Farid [3 ]
机构
[1] Hakim Sabzevari Univ, Dept Chem, Sabzevar 9617976487, Iran
[2] Ferdowsi Univ Mashhad, Dept Chem, Fac Sci, Mashhad, Iran
[3] Islamic Azad Univ, Bandar Abbas Branch, Dept Chem, Bandar Abbas 7915893144, Iran
关键词
ENCAPSULATED GAMMA-FE2O3 NANOPARTICLES; HIGHLY EFFICIENT; 1,2,4,5-TETRASUBSTITUTED IMIDAZOLES; 2,4,5-TRISUBSTITUTED IMIDAZOLES; TETRASUBSTITUTED IMIDAZOLES; RECOVERABLE CATALYST; SEPARABLE CATALYST; TRISUBSTITUTED IMIDAZOLES; HETEROPOLY ACIDS; ROOM-TEMPERATURE;
D O I
10.1039/c5ra10534j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
In this research, a magnetically-recoverable catalyst (NiFe2O4@SiO2-H3PMo12O40) was prepared by supporting phosphomolybdic acid (H3PMo12O40) onto silica-coated NiFe2O4 nanoparticles. The prepared sample was characterized by FT-IR, TEM, SEM and VSM techniques and then the catalytic activity of this catalyst was investigated in the synthesis of tri- and tetra-substituted imidazole derivatives. More importantly, the catalyst was easily isolated from the reaction mixture by a magnetic bar and reused at least ten times without significant degradation in its activity.
引用
收藏
页码:64850 / 64857
页数:8
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