Synthesis and characterization of periodic porous benzene-silica hybrid powders with cubic and hexagonal symmetries.

Valérie Goletto , Anne-Claire Bled , Gregor Trimmel , Michel Wong Chi Man (1) , Hee-Gweon Woo , Denys Durand , Florence Babonneau

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier

Organosilica powders with uniformly distributed bridging benzene groups have been synthesized from the condensation of bis- or tris-(triethoxysilyl)benzene in the presence of cetyltrimethylammoniumbromide. The syntheses were performed under strong acidic conditions and the organic groups were always incorporated without cleavage of the Si-C bonds as indicated by solid state MAS NMR studies. Depending on the nature of the precursors, materials with different ordering were obtained : a 2D-hexagonal (p6m) phase was formed from the 1,3-bis(triethoxysilyl)benzene, whereas the 1,4-bis(triethoxysilyl)benzene lead to a cubic Pm3n phase. The surfactant was removed either by solvent extraction or by controlled calcination, which did not affect the mesostructure of the materials.

Domaines: Matériaux

Valérie Goletto, Anne-Claire Bled, Gregor Trimmel, Michel Wong Chi Man, Hee-Gweon Woo, et al.. Synthesis and characterization of periodic porous benzene-silica hybrid powders with cubic and hexagonal symmetries.. Materials Research Society Symposia Proceedings, 2002, 726, pp.Q6.14. ⟨10.1557/PROC-726-Q6.14⟩. ⟨hal-00164026⟩