Periodic Mesoporous Organosilicas PMOs with Different Organic Bridging Groups: Synthesis and Characterization

摘要

We present results on new periodic mesoporous organosilicas synthesized with l, 4-bis(triethoxysilyl)benzene (BTEB), l, 2-bis(trimethoxysilyl)ethane (BTME) and bis[3-(trimethoxysilyl)propyl]amine (BTMPA). The materials show high inner surfaces up to 830 m~2/g and pore diameters in the range of 2.7 to 3.7 nm depending on the structure directing agent used. In case of BTEB as precursor and triblock copolymer Pluronic P123 as structure directing agent exceptional thick pore walls were obtained (7.2 nm). Characterization was carried out by P-XRD, nitrogen physisorption analysis, thermoanalytical methods and IR spectroscopy.