Heliconical smectic phases formed by achiral molecules
Abstract
Chiral symmetry breaking in soft matter is a hot topic of current research. Recently, such a phenomenon was found in a fluidic phase showing orientational order of molecules - the nematic phase; although built of achiral molecules, the phase can exhibit structural chirality - average molecular direction follows a short-pitch helix. Here in this paper, we report a series of achiral asymmetric dimers with an odd number of atoms in the spacer, which form twisted structures in nematic as well as in lamellar phases. The tight pitch heliconical nematic (NTB) phase and heliconical tilted smectic C (SmCTB) phase are formed. The formation of a variety of helical structures is accompanied by a gradual freezing of molecular rotation. In the lowest temperature smectic phase, HexI, the twist is expressed through the formation of hierarchical structure: nanoscale helices and mesoscopic helical filaments. The short-pitch helical structure in the smectic phases is confirmed by resonant X-ray measurements.
- Authors:
-
[2];
- Univ. of Aberdeen, King's College, Aberdeen, Scotland (United Kingdom)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS); Kent State Univ., Kent, OH (United States). Dept. of Physics and Liquid Crystal Inst.
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Univ. of Warsaw (Poland). Faculty of Chemistry
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1433133
- Grant/Contract Number:
- AC02-05CH11231; 2016/22/A/ST5/00319; DMR-1411344; DMR-1307674
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Communications
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Abberley, Jordan P., Killah, Ross, Walker, Rebecca, Storey, John M. D., Imrie, Corrie T., Salamo?czyk, Miros?aw, Zhu, Chenhui, Gorecka, Ewa, and Pociecha, Damian. Heliconical smectic phases formed by achiral molecules. United States: N. p., 2018.
Web. doi:10.1038/s41467-017-02626-6.
Abberley, Jordan P., Killah, Ross, Walker, Rebecca, Storey, John M. D., Imrie, Corrie T., Salamo?czyk, Miros?aw, Zhu, Chenhui, Gorecka, Ewa, & Pociecha, Damian. Heliconical smectic phases formed by achiral molecules. United States. https://doi.org/10.1038/s41467-017-02626-6
Abberley, Jordan P., Killah, Ross, Walker, Rebecca, Storey, John M. D., Imrie, Corrie T., Salamo?czyk, Miros?aw, Zhu, Chenhui, Gorecka, Ewa, and Pociecha, Damian. Mon .
"Heliconical smectic phases formed by achiral molecules". United States. https://doi.org/10.1038/s41467-017-02626-6. https://www.osti.gov/servlets/purl/1433133.
@article{osti_1433133,
title = {Heliconical smectic phases formed by achiral molecules},
author = {Abberley, Jordan P. and Killah, Ross and Walker, Rebecca and Storey, John M. D. and Imrie, Corrie T. and Salamo?czyk, Miros?aw and Zhu, Chenhui and Gorecka, Ewa and Pociecha, Damian},
abstractNote = {Chiral symmetry breaking in soft matter is a hot topic of current research. Recently, such a phenomenon was found in a fluidic phase showing orientational order of molecules - the nematic phase; although built of achiral molecules, the phase can exhibit structural chirality - average molecular direction follows a short-pitch helix. Here in this paper, we report a series of achiral asymmetric dimers with an odd number of atoms in the spacer, which form twisted structures in nematic as well as in lamellar phases. The tight pitch heliconical nematic (NTB) phase and heliconical tilted smectic C (SmCTB) phase are formed. The formation of a variety of helical structures is accompanied by a gradual freezing of molecular rotation. In the lowest temperature smectic phase, HexI, the twist is expressed through the formation of hierarchical structure: nanoscale helices and mesoscopic helical filaments. The short-pitch helical structure in the smectic phases is confirmed by resonant X-ray measurements.},
doi = {10.1038/s41467-017-02626-6},
journal = {Nature Communications},
number = 1,
volume = 9,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2018},
month = {Mon Jan 15 00:00:00 EST 2018}
}
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W-shaped mesogens and variations of their molecular structure
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Schiff base/ester liquid crystals with different lateral substituents: mesophase behaviour and DFT calculations
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Sulfur-linked cyanobiphenyl-based liquid crystal dimers and the twist-bend nematic phase
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The interplay between spatial and heliconical bond order in twist-bend nematic materials
preprint, January 2020
- Saha, Rony; Feng, Chenrun; Welch, Chris
- arXiv