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

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

doi:10.1002/open.201600138

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

Journal Article · Tue Feb 07 00:00:00 EST 2017 · ChemistryOpen

DOI:https://doi.org/10.1002/open.201600138· OSTI ID:1351644

Bergquist, Leah ^[1]; Zhang, Cuiyu ^[1]; Ribeiro de Almeida, Roberta R. ^[2]; Pellegrene, Brittany ^[3]; Salamonczyk, Miroslaw ^[4]; Kim, Matthew ^[1]; Hwang, Jung‐Im ^[5]; Kim, Kyeong‐Jin ^[5]; Lee, Joun‐Ho ^[5]; Jákli, Antal ^[1]; Hegmann, Torsten ^[6]

Chemical Physics Interdisciplinary Program Liquid Crystal Institute Kent State University Kent OH 44242-0001 USA
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
Department of Chemistry and Biochemistry Kent State University Kent OH 44242-0001 USA
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
LG Display Co., Ltd. 245, LG-ro, Wollong-myeon, Paju-si Gyeonggi-do 413-779 South Korea
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

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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231; CHE-1263087

OSTI ID:: 1351644

Alternate ID(s):: OSTI ID: 1351645; OSTI ID: 1408427

Journal Information:: ChemistryOpen, Journal Name: ChemistryOpen Vol. 6 Journal Issue: 2; ISSN 2191-1363

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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Cited by: 7 works

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
antiferroelectric liquid crystal display
bent-core liquid crystals
optically isotropic
polar smectic
room-temperature switching

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

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