Mesophase stabilization in ionic liquid crystals through pairing equally shaped mesogenic cations and anions
Abstract
The synthesis and properties of a set of novel ionic liquid crystals with congruently shaped cations and anions are reported to check whether pairing mesogenic cations with mesogenic anions leads to a stabilization of a liquid crystalline phase. To that avail 1-alkyl-3-methyl-triazolium cations with an alkyl chain length of 10, 12, and 14 carbon atoms have been combined with p-alkyloxy-benzenesulfonate anions with different alkyl chain lengths (n = 10, 12, and 14). The corresponding triazolium iodides have been synthesized as reference compounds where the cation and anion have strong size and shape mismatch. The mesomorphic behavior of all compounds is studied by differential scanning calorimetry and polarizing optical microscopy. All compounds except 1-methyl-3-decyltriazolium iodide, which qualifies as an ionic liquid, are thermotropic ionic liquid crystals. All other compounds adopt smectic A phases. As a result, a comparison of the thermal phase behavior of the 1-methyl-3-decyltriazolium bromides to the corresponding p-alkoxy-benzensulfonates reveals that definitely the mesophase is stabilized by pairing the rod-shaped 1-alkyl-3-methyltriazolium cation with a rod-like anion of similar size.
- Authors:
-
- Ruhr-Univ. Bochum, Bochum (Germany)
- Ruhr-Univ. Bochum, Bochum (Germany); Ames Lab., Ames, IA (United States); Iowa State Univ., Ames, IA (United States)
- Ruhr-Univ. Bochum, Bochum (Germany); Univ. Duisburg Essen, Essen (Germany)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1239155
- Report Number(s):
- IS-J-8856
Journal ID: ISSN 1528-7483
- Grant/Contract Number:
- AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Crystal Growth and Design
- Additional Journal Information:
- Journal Volume: 15; Journal Issue: 11; Journal ID: ISSN 1528-7483
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; ionic liquids; liquid crystals; ionic liquid crystals
Citation Formats
Stappert, Kathrin, Lipinski, Gregor, Kopiec, Gabriel, Spielberg, Eike T., and Mudring, Anja -Verena. Mesophase stabilization in ionic liquid crystals through pairing equally shaped mesogenic cations and anions. United States: N. p., 2015.
Web. doi:10.1021/acs.cgd.5b01023.
Stappert, Kathrin, Lipinski, Gregor, Kopiec, Gabriel, Spielberg, Eike T., & Mudring, Anja -Verena. Mesophase stabilization in ionic liquid crystals through pairing equally shaped mesogenic cations and anions. United States. https://doi.org/10.1021/acs.cgd.5b01023
Stappert, Kathrin, Lipinski, Gregor, Kopiec, Gabriel, Spielberg, Eike T., and Mudring, Anja -Verena. Thu .
"Mesophase stabilization in ionic liquid crystals through pairing equally shaped mesogenic cations and anions". United States. https://doi.org/10.1021/acs.cgd.5b01023. https://www.osti.gov/servlets/purl/1239155.
@article{osti_1239155,
title = {Mesophase stabilization in ionic liquid crystals through pairing equally shaped mesogenic cations and anions},
author = {Stappert, Kathrin and Lipinski, Gregor and Kopiec, Gabriel and Spielberg, Eike T. and Mudring, Anja -Verena},
abstractNote = {The synthesis and properties of a set of novel ionic liquid crystals with congruently shaped cations and anions are reported to check whether pairing mesogenic cations with mesogenic anions leads to a stabilization of a liquid crystalline phase. To that avail 1-alkyl-3-methyl-triazolium cations with an alkyl chain length of 10, 12, and 14 carbon atoms have been combined with p-alkyloxy-benzenesulfonate anions with different alkyl chain lengths (n = 10, 12, and 14). The corresponding triazolium iodides have been synthesized as reference compounds where the cation and anion have strong size and shape mismatch. The mesomorphic behavior of all compounds is studied by differential scanning calorimetry and polarizing optical microscopy. All compounds except 1-methyl-3-decyltriazolium iodide, which qualifies as an ionic liquid, are thermotropic ionic liquid crystals. All other compounds adopt smectic A phases. As a result, a comparison of the thermal phase behavior of the 1-methyl-3-decyltriazolium bromides to the corresponding p-alkoxy-benzensulfonates reveals that definitely the mesophase is stabilized by pairing the rod-shaped 1-alkyl-3-methyltriazolium cation with a rod-like anion of similar size.},
doi = {10.1021/acs.cgd.5b01023},
journal = {Crystal Growth and Design},
number = 11,
volume = 15,
place = {United States},
year = {Thu Jul 23 00:00:00 EDT 2015},
month = {Thu Jul 23 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
1,2,4-Triazolium ions as flexible scaffolds for the construction of polyphilic ionic liquid crystals
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Synthesis, structural characterization and luminescence properties of 1-carboxymethyl-3-ethylimidazolium chloride
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