title: Periodic mesoporous organosilica with molecular-scale ordering self-assembled by hydrogen bonds.
abstract: Nanoporous materials with functional frameworks have attracted attention because of their potential for various applications. Silica-based mesoporous materials generally consist of amorphous frameworks, whereas a molecular-scale lamellar ordering within the pore wall has been found for periodic mesoporous organosilicas (PMOs) prepared from bridged organosilane precursors. Formation of a "crystal-like" framework has been expected to significantly change the physical and chemical properties of PMOs. However, until now, there has been no report on other crystal-like arrangements. Here, we report a new molecular-scale ordering induced for a PMO. Our strategy is to form pore walls from precursors exhibiting directional H-bonding interaction. We demonstrate that the H-bonded organosilica columns are hexagonally packed within the pore walls. We also show that the H-bonded pore walls can stably accommodate H-bonding guest molecules, which represents a new method of modifying the PMO framework.
authors: Toyota Central R&D Laboratories, Inc.. nmizoshita@mosk.tytlabs.co.jp.|Advanced Catalytic Transformation Program for Carbon Utilization (ACT-C), Japan Science and Technology Agency (JST), Nagakute, Aichi 480-1192 (Japan). nmizoshita@mosk.tytlabs.co.jp.
authors: Norihiro
authors: N
authors: Mizoshita
authors: Toyota Central R&D Laboratories, Inc.. inagaki@mosk.tytlabs.co.jp.|Advanced Catalytic Transformation Program for Carbon Utilization (ACT-C), Japan Science and Technology Agency (JST), Nagakute, Aichi 480-1192 (Japan). inagaki@mosk.tytlabs.co.jp.
authors: Shinji
authors: S
authors: Inagaki
keywords: host-guest systems; hydrogen bonds; mesoporous materials; organosilicas; self-assembly