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

来源：

RSC ADVANCES | 2015年 / 5卷 / 80期

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

页码：64850 / 64857

页数：8

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