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Synthesis and characterization of Piperidine-4-carboxylic acid functionalized Fe 3O 4 nanoparticles as a magnetic catalyst for Knoevenagel reaction
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2012 (English)In: Materials research bulletin, ISSN 0025-5408, E-ISSN 1873-4227, Vol. 47, no 9, 2480-2486 p.Article in journal (Refereed) Published
Abstract [en]

Piperidine-4-carboxylic acid (PPCA) functionalized Fe 3O 4 nanoparticles as a novel organic-inorganic hybrid heterogeneous catalyst was fabricated and characterized by XRD, FT-IR, TGA, TEM and VSM techniques. Composition was determined as Fe 3O 4, while particles were observed to have spherical morphology. Size estimations using X-ray line profile fitting (10 nm), TEM (11 nm) and magnetization fitting (9 nm) agree well, revealing nearly single crystalline character of Fe 3O 4 nanoparticles. Magnetization measurements reveal that PPCA functionalized Fe 3O 4 NPs have superparamagnetic features, namely immeasurable coercivity and absence of saturation. Small coercivity is established at low temperatures. The catalytic activity of Fe 3O 4-PPCA was probed through one-pot synthesis of nitro alkenes through Knoevenagel reaction in CH 2Cl 2 at room temperature. The heterogeneous catalyst showed very high conversion rates (97%) and could be recovered easily and reused many times without significant loss of its catalytic activity.

Place, publisher, year, edition, pages
2012. Vol. 47, no 9, 2480-2486 p.
Keyword [en]
A. Magnetic materials, B. Chemical synthesis, C. X-ray diffraction, D. Catalytic properties, D. Magnetic properties
National Category
Materials Engineering
URN: urn:nbn:se:kth:diva-101342DOI: 10.1016/j.materresbull.2012.05.015ISI: 000309081400058ScopusID: 2-s2.0-84864626031OAI: diva2:547850

QC 20120829

Available from: 2012-08-29 Created: 2012-08-27 Last updated: 2012-11-06Bibliographically approved

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Toprak, Muhammet S.
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Functional Materials, FNM
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