ADSORPTION STUDIES OF CAGE-LIKE AND CHANNEL-LIKE ORDERED MESOPOROUS ORGANOSILICAS WITH VINYL AND MERCAPTOPROPYL SURFACE GROUPS
Ordered mesoporous cage-like silicas, FDU-1, with pendant vinyl and mercaptopropyl groups were synthesized via direct co-condensation of triethoxyvinylsilane with tetraethyl orthosilicate (TEOS), and 3-mercaptopropyl trimethoxysilane with TEOS.Moreover, vinyl-modified FDU-1 was prepared via post-synthesis modification of FDU-1 with triethoxyvinylsilane. For comparison, ordered mesoporous channel-like silica, SBA-15, with mercaptopropyl groups was synthesized by using both aforementioned methods. Nitrogen and argon adsorption-desorption isotherms provided evidence that short ligands such as vinyl can be easily incorporated to cage-like pores by both methods. The resulting materials possessed narrow pore size distributions (PSDs) and uniform openings of cage-like pores. In the case of FDU-1 with mercaptopropyl groups, argon adsorption indicated narrow PSD, whereas desorption showed nonuniformity of the pore entrance sizes. Furthermore, for the latter materials the removal of polymeric template was much more difficult.
MIETEK JARONIEC RAFAL M.GRUDZIEN
Department of Chemistry, Kent State University, Kent, OH 44242, USA
国际会议
天津
英文
175-188
2006-05-22（万方平台首次上网日期，不代表论文的发表时间）