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Issue 80, 2015
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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

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Abstract

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.

Graphical abstract: 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

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Article information


Submitted
03 Jun 2015
Accepted
20 Jul 2015
First published
30 Jul 2015

RSC Adv., 2015,5, 64850-64857
Article type
Paper

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

B. Maleki, H. Eshghi, A. Khojastehnezhad, R. Tayebee, S. S. Ashrafi, G. E. Kahoo and F. Moeinpour, RSC Adv., 2015, 5, 64850
DOI: 10.1039/C5RA10534J

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