Synthesis and characterization of magnetic flexible polyurethane foam (PUF) nanocomposites is reported. In order to improving dispersion and preventing aggregation of Fe3O4 nanoparticles in the polymer matrix, this material was modified by synthesized dipodal silane (ECA), the reaction product of 3-aminopropyltriethoxysilane (APTS) and γ-glycidoxypropyltrimethoxysilane (GPTS). The chemical structure of synthesized ECA was identified by nuclear magnetic resonance spectroscopy (1HNMR) and Fourier transform infrared spectroscopy (FT-IR), respectively. Magnetic flexible polyurethane foam nanocomposites prepared by the incorporation of ECA-modified Fe3O4 nanoparticles and characterized by their apparent density, thermogravimetric analysis (TGA), magnetic properties analysis (VSM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and FT-IR spectra, respectively. The TEM and SEM images indicated that the nanoparticles were dispersed homogeneously in PUF matrix. Finally, it was confirmed that the thermal and magnetic properties of magnetic PUF nanocomposite depend on the amount of magnetic nanoparticles.
The unique properties of N-heterocyclic carbenes (NHCs) as an effective ligand for palladium catalytic centers have recently found much attention. In this work, Fe
3
O
4
nanoparticle supported palladium(II)–N-heterocyclic carbene catalyst was successfully designed, synthesized and characterized by various methods. The activity of the catalyst was evaluated in the Mizoroki-Heck cross-coupling reaction in which the desired products were obtained in high yield in H
2
O as a green solvent. The reaction was carried out in short reaction times using low amounts of the catalyst. Moreover, the catalyst was easily separated from the reaction media and reused for 5 cycles.
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