One pot synthesis of ordered mesoporous organosilica particles bearing propyl-, octyl- and hexadecyl-chains

• Published in: Journal of sol-gel science and technology 2012-09, Vol.63 (3), p.587-594
• Main Authors: Vodolazkaya, Natalya A., Despas, Christelle, Lebeau, Bénédicte, Marichal, Claire, Walcarius, Alain
• Format: Article
• Language: English
• Subjects: Ammonia; Analytical chemistry; Brief Communication; Ceramics; Cetyltrimethylammonium bromide; Chains; Chemical Sciences; Chemistry; Chemistry and Materials Science; Colloidal gels. Colloidal sols; Colloidal state and disperse state; Composites; Ethanol; Exact sciences and technology; General and physical chemistry; Glass; Inorganic Chemistry; Inorganic materials; Materials Science; Nanotechnology; Natural Materials; NMR spectroscopy; Optical and Electronic Materials; Organic chemistry; Porosity; Porous materials; Silicon dioxide; Surface physical chemistry; Synthesis; Tetraethyl orthosilicate; X-ray diffraction
• ISSN: 0928-0707; 1573-4846
• DOI: 10.1007/s10971-012-2816-5

New hybrid organic–inorganic materials exhibiting ordered mesoporous structures have been synthesized by co-condensation of tetraethoxysilane and various alkyltrimethoxysilanes with increasing length of the hydrocarbon chain (propyl, octyl, hexadecyl), in water–ethanol solution containing ammonia, in the presence of a cationic surfactant (cetyltrimethylammonium bromide) as templating agent. The obtained hybrid materials were characterized by using several physico-chemical techniques, such as X-ray diffraction, N 2 adsorption, 29 Si MAS NMR, SEM and elemental analysis. It was shown that the direct synthesis procedure allows obtaining ordered hybrid mesoporous silica with various contents of organic functions, from 5 to 20 %. Moreover, increasing the chain length of the organic group, from propyl to octyl and hexadecyl leads to a change of the pore structure from hexagonal p6mm MCM-41 type architecture to cubic Ia3d MCM-48 type mesostructure.