Monodisperse particles of bifunctional periodic mesoporous organosilica

被引：40
作者：
Cho, Eun-Bum [1 ]
Kim, Dukjoon [1 ]
Jaroniec, Mietek [2 ]
机构：
[1] Sungkyunkwan Univ, Dept Chem Engn, Polymer Technol Inst, Suwon 440746, Gyeonggi Do, South Korea
[2] Kent State Univ, Dept Chem, Kent, OH 44240 USA
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 13期
关键词：
D O I：
10.1021/jp710772w
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Monodisperse particles of periodic mesoporous organosilica (PMO) with ethane- and phenylene-bridging groups were prepared using 1,2-bis(triethoxysilyl)ethane (BTEE) and 1,4-bis(triethoxysilyl)benzene (BTEB) organosilica precursors, and a Pluronic P123 poly(ethylene oxide)-poly(propylene oxide) -poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer template under slightly acidic conditions. Highly ordered monodisperse particles having hexagonal mesostructure (p6mm) and coiled shape were obtained only for the BTEE/BTEB molar ratios between 70:30 and 60:40. The average external diameter of these coiled particles was about 2-3 mu m, whereas the diameter of mesopores present in these particles was about 7.4 nm.
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收藏
页码：4897 / 4902
页数：6
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