Iranian Nanotechnology Society International Journal of Nanoscience and Nanotechnology 1735-7004 11 1 2015 03 01 Fabrication of 2-Chloropyridine-Functionalized Fe3O4/Amino-Silane Core–Shell Nanoparticles 39 44 12361 EN M.M.A. Nikje Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, I.R.Iran L. Sarchami Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, I.R.Iran L. Rahmani Department of Chemistry, Faculty of Science, Imam Khomeini International University, Qazvin, I.R.Iran Journal Article 2014 09 27 In this report, magnetic iron oxide nanoparticles were synthesized via coprecipitation of Fe2+ and Fe3+ with ammonium hydroxide, and the surface of synthesized nanoparticles was organically functionalized by commercially available amine coupling agent namely, 3-aminopropyl trimethoxysilane (APTS) by using well-known sol–gel method. Further reaction of the synthesized Fe3O4@APTS core-shell magnetite nanoparticles with 2-Chloropyridine via nucleophilic aromatic mechanism in position 2 led to the target molecule Fe3O4@APTS/ 2-Chloropyridine. All prepared materials e.g the magnetite iron oxide, Fe3O4@APTS nanoparticles as well as organically coated Fe3O4@APTS/ 2-Chloropyridine magnetite particles were characterized using Fourier transforms infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). SEM images showed that the Fe3O4@APTS/ 2-Chloropyridine nanoparticles were roughly spherical with average size of 45-55 nm. FTIR indicated the formation of a layer of APTS-Py on the surface of the Fe3O4 magnetite core. Thermogravimetric analysis of the coated APTS-Py on the Fe3O4 surface revealed that 8 % of organic materials coated on iron oxide nanoparticles.       https://www.ijnnonline.net/article_12361_a3a51080d3fcd1adab3a44996fd6b977.pdf