New magnetic material based on modified multi-walled carbon nanotubes and iron(III) derivatives

Magnetically active products of the interaction between the modified multi-walled carbon nanotubes, MWCNT-CO-L (L = 3-(NHCH 3 )C 5 H 4 N), and compounds containing Fe III ions, FeCl 3 ·6H 2 O (including those with 57 Fe isotopes) and trinuclear pivalate Fe 2 NiO(Piv) 6 (HPiv) 3 (HPiv = HO 2 CCMe 3 ), were obtained. The new substances were characterized by thermo-gravimetry combined with mass spectral analysis, Mössbauer spectroscopy, atomic absorption spectrophotometry, electron microscopy, and magnetic measurements. Based on the data of Mössbauer spectroscopy and magnetic studies, it was suggested that in the synthesized {Fe}-MWCNT-CO-L the surface of the carbon nanotubes contains nanoparticles of the polynuclear iron(III) derivatives.