Synthesis and Characterization of Magnetite Nanoparticles and the Effect of [Fe(sac)2(H2O)4].2H2O complex on its magnetic properties

A novel inorganic complex (shell)@metal oxide (core) was demonstrated by simple and highly efficient synthesis of Fe3O4 nanoparticles (Fe3O4NPs) coated by [Fe(sac)2(H2O)4] .2H2O complex through one-pot reaction of prepared Fe3O4 nanoparticles and [Fe(sac)2(H2O)4].2H2O. The Fe3O4 NPs structure was characterized by infrared spectroscopy (IR), scanning electron microscope (SEM) and energy dispersive X-rays (EDX) while the resulted [Fe(sac)4(H2O)2]@Fe3O4NPs was characterized using IR spectroscopy and XRD. The magnetic feature, which is one of physical properties of Fe3O4NPs and the newly synthesized core-shell [Fe(sac)2(H2O)4]@Fe3O4NPs were examined in order to study how the Fe in its complex effects on the magnetic properties of magnetite nanoparticles.


Introduction:
The nano structure of Fe 3 O 4 with diameters (x,y,z) ranging from 1 and 100 nm and find an important nano material because it plays a main role in various fields as it was used as an adsorbent in micro solid phase extraction of metals or dyes [1,2], data storage [3], biosensing [4] and drug delivery [5]. Magnetite nanoparticles (Fe 3 O 4 ) can generally be separated from its reaction vessel by an external magnet such as neodymium magnet [6]. In recent times, the production of core-shell nanocomposites which may possibly be used as a catalysts for catalyzing organic reactions has been not far described [7]. Core-shell nanoparticles having a paramagnetic central material (core) such as iron or iron oxide are air and thermally stable and can be simply separated by an external magnet to evade old-style filtration methods [8].
Meanwhile, saccharin as an fake sweetener, the coordination chemistry of this heterocyclic amide have been extensively studied over the past 38 years [9]. There has been an important attention in the chemistry of metal ions bounded saccharine ligand over the past two decades ever since its demonstrations a varied kind of metal ion bonding fashions, and it is possibly useful as co-ligand in bioactivity studies. This ligand showed a variety of coordination modes to metals and was able to bind in a monodentate mode through either nitrogen atom via covalent bond, negatively charged or through the oxygen atom of carbonyl group.
Furthermore, saccharine ligand has the ability to coordinate in a bidentate or even polydentate fashions with the contribution of the N-and O-donor atoms [9]. Saccharinate behaves as a monodentate ligand coordinates to the first row divalent metal ions through its deprotonated nitrogen atom [9][10][11][12][13][14][15]. In the present work, we report the preparation and characterization of inorganic core-shell nanoparticle containing [Fe(sac) 2  nanoparticles as a core. Additionally, we report the magnetism properties of as-prepared inorganic core-shell nanoparticle.

Materials and Methods:
The chemicals used in this work were obtained from Sigma Aldrich and Merck and used without further purification. FT-IR spectra were recorded in the range 400-4000 cm −1 with a Shimadzu 8400S spectrometer. The nanostructure of Fe 3 O 4 NPs was characterized using a Philips Xpert X-ray powder diffraction difractometer (Cu Kα, radiation, λ = 1.54056 Å), at a scanning speed of 2°/min with 2ө ranging 10° to 80°. A thermal method using ultrasonic equipment with probe (6mm) model UP200ht was used for homogenizing of the mixture. The

Preparation and Characterization of the Nanocatalyst
The core-shell [Fe(sac) 2

Conclusions:
In this study, the first inorganic core-shell nanoparticle that containing a complex of Fe(II) ion with saccharine ligand as a shell and Fe 3 O 4 nanoparticles as a core has been successfully prepared and characterized. The yields of each step are high, and isolation of product from the