Synthesis, characterization and nanocatalysis application of Core-Shell superparamagnetic Nanoparticles of Fe3O4@Pd.

ARIEL CAPPELLETTI; PAULA UBERMANN; SANDRA MARTIN; MARTIN SALETA; HORACIO E. TROIANI; RODOLFO D. SA´NCHEZ; RAÚL CARBONIO; DARÍO ARRUA, DANIEL SERRANO, GUSTAVO PASTRANA, MIRIAM STRUMIA AND CECILIA ALVAREZ.

AUSTRALIAN JOURNAL OF CHEMISTRY

CSIRO PUBLISHING

Lugar: Collingwood; Año: 2015 p. 1495 - 1501

0004-9425

There is a wide number of different synthetic methods to obtain magnetite (Fe3O4) superparamagnetic nanoparticles(SPNPs). However, only a few are able to produce very small and well defined SPNPs with narrow size distribution. Wereport a modification of the metal-complex decomposition in organic media method in which we replace iron(III)acetylacetonate (Fe(Acac)3) with an iron?urea complex (Fe-Urea) as metal source for the synthesis. With this modificationwe were able to obtain small particle sizes with a good control in size distribution. The Fe-Urea complex is easy to preparewith excellent yields. Core?shell nanoparticles are then prepared using palladium(II) acetylacetonate as a Pd source, toobtain a Pd0 shell stabilised by oleylamine. The core?shell superparamagnetic nanoparticles of Fe3O4@Pd-OA areextensively characterized by FT-IR, powder X-ray diffraction, transmission electron microscopy, UV-vis, thermogravimetricanalysis/differential scanning calorimetry, and magnetic susceptibility measurements, and tested in a palladiumcatalyzedcross-coupling Suzuki?Miyaura reaction with promising results.