title: Aerosol-assisted synthesis of mesoporous organosilica microspheres with controlled organic contents.
abstract: Periodic mesoporous organosilica (PMO) spherical particles with different organic contents were synthesized in one pot by reacting 1,2-bis(triethoxysilyl)ethane (BTSE) with tetraethylorthosilicate (TEOS) using a spray-drying technique. The scanning electron microscopy observation of spray-dried products clearly showed the formation of spherical particles. The29Si magic angle spinning nuclear magnetic resonance data revealed that the organic contents due to ethane fragments embedded in the frameworks were controllable and consistent with the BTSE/TEOS molar ratios of precursor solutions. Transmission electron microscopy, small-angle x-ray scattering, and N2adsorption data of PMO with controlled organic contents indicated that the ethane fragments were embedded in the frameworks with the formation of ordered mesostructures. PMO with a high organic content (BTSE/TEOS=0.50) only showed a hydrophobic property. According to the same procedure, benzene groups were also integrated to a similar degree in the frameworks by using 1,4-bis(triethoxysilyl)benzene.
authors.affiliation: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; PRESTO, Japan Science and Technology Agency (JST).
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Yamauchi
authors.affiliation: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Norihiro
authors.initials: N
authors.lastname: Suzuki
authors.affiliation: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Present address: Department of Civil and Environmental Engineering, Indian Institute of Technology (IIT), Kanpur, India.
authors.forename: Prashant
authors.initials: P
authors.lastname: Gupta
authors.affiliation: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Keisuke
authors.initials: K
authors.lastname: Sato
authors.affiliation: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; PRESTO, Japan Science and Technology Agency (JST).
authors.forename: Naoki
authors.initials: N
authors.lastname: Fukata
authors.affiliation: Advanced Nano Characterization Center, NIMS, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan.
authors.forename: Miwa
authors.initials: M
authors.lastname: Murakami
authors.affiliation: World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Advanced Nano Characterization Center, NIMS, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Shimizu
authors.affiliation: Nanoceramics Center, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Inoue
authors.affiliation: Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Shimoshidami, Moriyama, Nagoya 463-8560, Japan.
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Kimura
keywords: aerosol-assisted synthesis; hybrid material; mesoporous material; organosilica; silica; sol-gel process; surfactant; triblock copolymer