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Title: The effect of cation structure on the mesophase architecture of self-assembled and polymerized imidazolium-based ionic liquids.

Abstract

The binary phase behavior of a series of imidazolium-based ionic liquids (ILs) has been investigated. In particular, the effect of two structural modifications of the imidazolium cation, alkyl chain length, and the introduction of a polymerizable acryloyl group at the alkyl chain terminus, has been studied using small angle X-ray scattering. Upon increasing water content, the non-polymerizable IL, 1-decyl-3-methylimidazolium chloride, adopts mesophase structures of predominately two-dimensional (2D) hexagonal symmetry, including structures intermediate in character between lamellae and 2D hexagonal micelles. Introduction of a photopolymerizable acryloyl functional group to form 1-(10-(acryloyloxy)decyl)-3-methylimidazolium chloride produces a rod-coil IL cation that yields self-assembled mesophases in which the formation of tetragonal morphologies is favored. Covalent linking of the IL cations by UV-induced polymerization converts the lyotropic mesophase into three-dimensional biocontinuous chemical gels. Reducing the alkyl chain length, as in the polymerizable IL cation 1-(8-(acryloyloxy)octyl)-3-methylimidazolium chloride, severely reduces the self-assembled mesophase order, and triggers the formation of only weakly ordered one-dimensional lamellar structures.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
915333
Report Number(s):
ANL/MSD/JA-59496
TRN: US200817%%322
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Macromol. Chem. Phys.; Journal Volume: 208; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; IMIDAZOLES; MORPHOLOGY; CATIONS; CHLORIDES; X-RAY DIFFRACTION; POLYMERIZATION; PHASE STUDIES

Citation Formats

Batra, D., Seifert, S., Firestone, M. A., and Materials Science Division. The effect of cation structure on the mesophase architecture of self-assembled and polymerized imidazolium-based ionic liquids.. United States: N. p., 2007. Web. doi:10.1002/macp.200700174.
Batra, D., Seifert, S., Firestone, M. A., & Materials Science Division. The effect of cation structure on the mesophase architecture of self-assembled and polymerized imidazolium-based ionic liquids.. United States. doi:10.1002/macp.200700174.
Batra, D., Seifert, S., Firestone, M. A., and Materials Science Division. Mon . "The effect of cation structure on the mesophase architecture of self-assembled and polymerized imidazolium-based ionic liquids.". United States. doi:10.1002/macp.200700174.
@article{osti_915333,
title = {The effect of cation structure on the mesophase architecture of self-assembled and polymerized imidazolium-based ionic liquids.},
author = {Batra, D. and Seifert, S. and Firestone, M. A. and Materials Science Division},
abstractNote = {The binary phase behavior of a series of imidazolium-based ionic liquids (ILs) has been investigated. In particular, the effect of two structural modifications of the imidazolium cation, alkyl chain length, and the introduction of a polymerizable acryloyl group at the alkyl chain terminus, has been studied using small angle X-ray scattering. Upon increasing water content, the non-polymerizable IL, 1-decyl-3-methylimidazolium chloride, adopts mesophase structures of predominately two-dimensional (2D) hexagonal symmetry, including structures intermediate in character between lamellae and 2D hexagonal micelles. Introduction of a photopolymerizable acryloyl functional group to form 1-(10-(acryloyloxy)decyl)-3-methylimidazolium chloride produces a rod-coil IL cation that yields self-assembled mesophases in which the formation of tetragonal morphologies is favored. Covalent linking of the IL cations by UV-induced polymerization converts the lyotropic mesophase into three-dimensional biocontinuous chemical gels. Reducing the alkyl chain length, as in the polymerizable IL cation 1-(8-(acryloyloxy)octyl)-3-methylimidazolium chloride, severely reduces the self-assembled mesophase order, and triggers the formation of only weakly ordered one-dimensional lamellar structures.},
doi = {10.1002/macp.200700174},
journal = {Macromol. Chem. Phys.},
number = 2007,
volume = 208,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}