Hydrogen bonding in self organized lamellar hybrid silica Auteur(s): Bantignies J.-L., Vellutini L., Sauvajol J.-L., Maurin D., Wong Chi Man M., Dieudonne-George P., Moreau J.J.E. (Article) Publié: Journal Of Non-Crystalline Solids, vol. 345-346 p.605-609 (2004) Texte intégral en Openaccess : Ref HAL: hal-00164088_v1 DOI: 10.1016/j.jnoncrysol.2004.08.106 WoS: 000225583200115 Exporter : BibTex | endNote 25 Citations Résumé: X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) investigations have been performed to study the self-assembly properties of lamellar organicinorganic bridged silsesquioxanes. The organic part consists of an alkylene chain (flexible spacer) between two urea groups. For this study, two samples with different chain length (six and twelve carbon atoms) were synthesized. It is pointed out that the self-assembly properties of the organic component are controlled both by the hydrophobic interactions between alkylene chains and by the hydrogen bonds between urea groups. Infrared results clearly show a direct correlation between the strength of the hydrogen-bond and the crystallinity of the organicinorganic hybrid materials. Furthermore, the study of the asymmetric stretching CH2 correlated with XRD results indicate that the disorder along the alkylene chain decreases with longer chain length. |