Synthesis and Characterization of N3P3(O2C12H8)(2)(OC6H4Si(CH3)(3))(OC6H4Br) and Its Conversion to Nanostructured Si Material

Abstract

A new silicated cyclotriphosphazene N3P3(O2C12H8)(2)(OC6H4Si(CH3)(3))(OC6H4Br) 1 has been synthesized and characterized. The solid state pyrolysis of 1 in air gives a nanostructured SiP2O7 3D network. The morphology of the network strongly depends on the temperature of the pyrolysis. Spinal-like columns and ring-shaped SiP2O7 are formed at 800 degrees C, while, at 600 degrees C, fused grains of about 300 nm were observed. Based on air TG and DSC thermal studies, we propose the mechanism of formation for the nanostructured network.