Synthesis of new lamellar inorganic–organic talc-like hybrids

Abstract

One-step sol–gel syntheses of lamellar organic–inorganic hybrids with a talc like structure are performed using N-phenylaminomethyltrimethoxysilane (PAM-TMS) and phenethyltrimethoxysilane (PE-TMS) as silicon sources. Results obtained by X-ray diffraction and X-ray fluorescence show that after one day of ageing at room temperature, talc-like hybrids (TLH) are obtained. The FTIR spectra drive to the conclusion that the organic moieties are present in the structure. The integrity of these was confirmed by ¹³C solid-state CP MAS NMR. ¹H–¹³C CP MAS NMR magnetization curves performed on both samples seem to indicate a lower mobility for the phenylaminomethyl pending group. ²⁹Si MAS NMR spectra show a majority of highly condensed silicon environments for PE-TLH whereas a significant amount of low condensed species are detected for PAM-TLH. TEM micrographs reveal exfoliated layers for phenethyl based materials.