Abstract
Hexylene-bridged polysilsesquioxanes were synthesized from 1,6-bis(triethoxysilyl)hexane (BESH) by acid- and base-catalyzed, sol-gel polymerizations and surfactant templating in order to compare, for the first time for any bridged polysilsesquioxane, the structures and porosities created by the different methods of preparation. Surfactant templating with Brij 56 under acidic conditions and N-(3-trimethyl-ammoniumpropyl)hexadecylammonium dibromide under basic conditions gave rise to the first periodic mesoporous hexylene-bridged polysilsesquioxanes ever reported. Both exhibited cubic Pm3n mesostructures with narrow pore size distributions (2.2 and 3.82 nm, respectively) and the highest surface areas ever reported for hexylene-bridged polysilsesquioxanes. Hexylene-bridged polysilsesquioxanes prepared under acidic, sol-gel conditions became non-porous during drying, but base-catalyzed sol-gel polymerizations of BESH afforded high surface area xerogels with pore size distributions comparable to periodic mesoporous organosilicas.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 139-143 |
| Number of pages | 5 |
| Journal | Journal of Non-Crystalline Solids |
| Volume | 406 |
| DOIs | |
| State | Published - Dec 15 2014 |
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Keywords
- Hexylene bridged polysilsesquioxanes
- Mesoporous cubic phase
- Sol-gel polymerized
- Surfactant templated
ASJC Scopus subject areas
- Condensed Matter Physics
- Ceramics and Composites
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
Cite this
Comparison of new periodic, mesoporous, hexylene-bridged polysilsesquioxanes with Pm3n symmetry versus sol-gel polymerized, hexylene-bridged gels. / Lin, Derong; Hu, Lijiang; You, Hong; Tolbert, Stephanie H.; Loy, Douglas A.
In: Journal of Non-Crystalline Solids, Vol. 406, 15.12.2014, p. 139-143.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Comparison of new periodic, mesoporous, hexylene-bridged polysilsesquioxanes with Pm3n symmetry versus sol-gel polymerized, hexylene-bridged gels
AU - Lin, Derong
AU - Hu, Lijiang
AU - You, Hong
AU - Tolbert, Stephanie H.
AU - Loy, Douglas A
PY - 2014/12/15
Y1 - 2014/12/15
N2 - Hexylene-bridged polysilsesquioxanes were synthesized from 1,6-bis(triethoxysilyl)hexane (BESH) by acid- and base-catalyzed, sol-gel polymerizations and surfactant templating in order to compare, for the first time for any bridged polysilsesquioxane, the structures and porosities created by the different methods of preparation. Surfactant templating with Brij 56 under acidic conditions and N-(3-trimethyl-ammoniumpropyl)hexadecylammonium dibromide under basic conditions gave rise to the first periodic mesoporous hexylene-bridged polysilsesquioxanes ever reported. Both exhibited cubic Pm3n mesostructures with narrow pore size distributions (2.2 and 3.82 nm, respectively) and the highest surface areas ever reported for hexylene-bridged polysilsesquioxanes. Hexylene-bridged polysilsesquioxanes prepared under acidic, sol-gel conditions became non-porous during drying, but base-catalyzed sol-gel polymerizations of BESH afforded high surface area xerogels with pore size distributions comparable to periodic mesoporous organosilicas.
AB - Hexylene-bridged polysilsesquioxanes were synthesized from 1,6-bis(triethoxysilyl)hexane (BESH) by acid- and base-catalyzed, sol-gel polymerizations and surfactant templating in order to compare, for the first time for any bridged polysilsesquioxane, the structures and porosities created by the different methods of preparation. Surfactant templating with Brij 56 under acidic conditions and N-(3-trimethyl-ammoniumpropyl)hexadecylammonium dibromide under basic conditions gave rise to the first periodic mesoporous hexylene-bridged polysilsesquioxanes ever reported. Both exhibited cubic Pm3n mesostructures with narrow pore size distributions (2.2 and 3.82 nm, respectively) and the highest surface areas ever reported for hexylene-bridged polysilsesquioxanes. Hexylene-bridged polysilsesquioxanes prepared under acidic, sol-gel conditions became non-porous during drying, but base-catalyzed sol-gel polymerizations of BESH afforded high surface area xerogels with pore size distributions comparable to periodic mesoporous organosilicas.
KW - Hexylene bridged polysilsesquioxanes
KW - Mesoporous cubic phase
KW - Sol-gel polymerized
KW - Surfactant templated
UR - http://www.scopus.com/inward/record.url?scp=84908393385&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84908393385&partnerID=8YFLogxK
U2 - 10.1016/j.jnoncrysol.2014.09.045
DO - 10.1016/j.jnoncrysol.2014.09.045
M3 - Article
VL - 406
SP - 139
EP - 143
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
SN - 0022-3093
ER -