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Title: An Optically Isotropic Antiferroelectric Liquid Crystal (OI‐AFLC) Display Mode Operating over a Wide Temperature Range using Ternary Bent‐Core Liquid Crystal Mixtures

Abstract

Abstract We report on the synthesis and characterization of bent‐core liquid crystal (LC) compounds and the preparation of mixtures that provide an optically isotropic antiferroelectric (OI‐AFLC) liquid crystal display mode over a very wide temperature interval and well below room temperature. From the collection of compounds synthesized during this study, we recognized that several ternary mixtures displayed a modulated SmC a P A phase down to below −40 °C and up to about 100 °C on both heating and cooling, as well as optical tilt angles in the transformed state of approximately 45° (optically isotropic state). The materials were fully characterized and their liquid crystal as well as electro‐optical properties analyzed by polarized optical microscopy, differential scanning calorimetry, synchrotron X‐ray diffraction, dielectric spectroscopy, and electro‐optical tests.

Authors:
 [1];  [1];  [2];  [3];  [4];  [1];  [5];  [5];  [5];  [1];  [6]
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  1. Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University Kent OH 44242-0001 USA
  2. Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University Kent OH 44242-0001 USA, Department of Physics Federal University of Technology Apucarana PR 86812-460 Brazil
  3. Department of Chemistry and Biochemistry Kent State University Kent OH 44242-0001 USA
  4. Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University Kent OH 44242-0001 USA, Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
  5. LG Display Co., Ltd. 245, LG-ro, Wollong-myeon, Paju-si Gyeonggi-do 413-779 South Korea
  6. Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University Kent OH 44242-0001 USA, Department of Chemistry and Biochemistry Kent State University Kent OH 44242-0001 USA
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1351644
Alternate Identifier(s):
OSTI ID: 1351645; OSTI ID: 1408427
Grant/Contract Number:  
AC02-05CH11231; CHE-1263087
Resource Type:
Published Article
Journal Name:
ChemistryOpen
Additional Journal Information:
Journal Name: ChemistryOpen Journal Volume: 6 Journal Issue: 2; Journal ID: ISSN 2191-1363
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; antiferroelectric liquid crystal display; bent-core liquid crystals; optically isotropic; polar smectic; room-temperature switching

Citation Formats

Bergquist, Leah, Zhang, Cuiyu, Ribeiro de Almeida, Roberta R., Pellegrene, Brittany, Salamonczyk, Miroslaw, Kim, Matthew, Hwang, Jung‐Im, Kim, Kyeong‐Jin, Lee, Joun‐Ho, Jákli, Antal, and Hegmann, Torsten. An Optically Isotropic Antiferroelectric Liquid Crystal (OI‐AFLC) Display Mode Operating over a Wide Temperature Range using Ternary Bent‐Core Liquid Crystal Mixtures. Germany: N. p., 2017. Web. doi:10.1002/open.201600138.
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Bergquist, Leah, Zhang, Cuiyu, Ribeiro de Almeida, Roberta R., Pellegrene, Brittany, Salamonczyk, Miroslaw, Kim, Matthew, Hwang, Jung‐Im, Kim, Kyeong‐Jin, Lee, Joun‐Ho, Jákli, Antal, & Hegmann, Torsten. An Optically Isotropic Antiferroelectric Liquid Crystal (OI‐AFLC) Display Mode Operating over a Wide Temperature Range using Ternary Bent‐Core Liquid Crystal Mixtures. Germany. https://doi.org/10.1002/open.201600138
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Bergquist, Leah, Zhang, Cuiyu, Ribeiro de Almeida, Roberta R., Pellegrene, Brittany, Salamonczyk, Miroslaw, Kim, Matthew, Hwang, Jung‐Im, Kim, Kyeong‐Jin, Lee, Joun‐Ho, Jákli, Antal, and Hegmann, Torsten. Tue . "An Optically Isotropic Antiferroelectric Liquid Crystal (OI‐AFLC) Display Mode Operating over a Wide Temperature Range using Ternary Bent‐Core Liquid Crystal Mixtures". Germany. https://doi.org/10.1002/open.201600138.
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@article{osti_1351644,
title = {An Optically Isotropic Antiferroelectric Liquid Crystal (OI‐AFLC) Display Mode Operating over a Wide Temperature Range using Ternary Bent‐Core Liquid Crystal Mixtures},
author = {Bergquist, Leah and Zhang, Cuiyu and Ribeiro de Almeida, Roberta R. and Pellegrene, Brittany and Salamonczyk, Miroslaw and Kim, Matthew and Hwang, Jung‐Im and Kim, Kyeong‐Jin and Lee, Joun‐Ho and Jákli, Antal and Hegmann, Torsten},
abstractNote = {Abstract We report on the synthesis and characterization of bent‐core liquid crystal (LC) compounds and the preparation of mixtures that provide an optically isotropic antiferroelectric (OI‐AFLC) liquid crystal display mode over a very wide temperature interval and well below room temperature. From the collection of compounds synthesized during this study, we recognized that several ternary mixtures displayed a modulated SmC a P A phase down to below −40 °C and up to about 100 °C on both heating and cooling, as well as optical tilt angles in the transformed state of approximately 45° (optically isotropic state). The materials were fully characterized and their liquid crystal as well as electro‐optical properties analyzed by polarized optical microscopy, differential scanning calorimetry, synchrotron X‐ray diffraction, dielectric spectroscopy, and electro‐optical tests.},
doi = {10.1002/open.201600138},
journal = {ChemistryOpen},
number = 2,
volume = 6,
place = {Germany},
year = {Tue Feb 07 00:00:00 EST 2017},
month = {Tue Feb 07 00:00:00 EST 2017}
}
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https://doi.org/10.1002/open.201600138
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