Comparison of new periodic, mesoporous, hexylene-bridged polysilsesquioxanes with Pm3n symmetry versus sol-gel polymerized, hexylene-bridged gels

Derong Lin, Lijiang Hu, Hong You, Stephanie H. Tolbert, Douglas A Loy

Research output: Contribution to journalArticle

10 Citations (Scopus)

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 languageEnglish (US)
Pages (from-to)139-143
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume406
DOIs
StatePublished - Dec 15 2014

Fingerprint

Sol-gels
Gels
gels
porosity
Pore size
symmetry
Surface active agents
polymerization
surfactants
Polymerization
dibromides
Xerogels
xerogels
Surface-Active Agents
Hexane
Cetomacrogol
drying
Drying
Porosity
Hexanes

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 journalArticle

@article{5b1962577116450fa747dbd41be2fb5e,
title = "Comparison of new periodic, mesoporous, hexylene-bridged polysilsesquioxanes with Pm3n symmetry versus sol-gel polymerized, hexylene-bridged gels",
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.",
keywords = "Hexylene bridged polysilsesquioxanes, Mesoporous cubic phase, Sol-gel polymerized, Surfactant templated",
author = "Derong Lin and Lijiang Hu and Hong You and Tolbert, {Stephanie H.} and Loy, {Douglas A}",
year = "2014",
month = "12",
day = "15",
doi = "10.1016/j.jnoncrysol.2014.09.045",
language = "English (US)",
volume = "406",
pages = "139--143",
journal = "Journal of Non-Crystalline Solids",
issn = "0022-3093",
publisher = "Elsevier",

}

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

AN - SCOPUS:84908393385

VL - 406

SP - 139

EP - 143

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

SN - 0022-3093

ER -