Synthesis and properties of highly tilted antiferroelectric liquid crystalline (R) enantiomers

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F24%3A00600515" target="_blank" >RIV/68378271:_____/24:00600515 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0357838" target="_blank" >https://hdl.handle.net/11104/0357838</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/ma17204967" target="_blank" >10.3390/ma17204967</a>

Result language
angličtina
Original language name
Synthesis and properties of highly tilted antiferroelectric liquid crystalline (R) enantiomers
Original language description
Antiferroelectric liquid crystals with a high tilt angle of the director and a long helical pitch are highly desirable materials for applications in photonic transducers, offering submillisecond response times in electro-optic effects. This work reports the design of four new rod-like antiferroelectric (R) laterally substituted enantiomers with fluorine atoms used as substituents. The synthesized compounds are three-ring rod-like materials with a chiral center based on (R)-(-)-2-octanol. Two newly synthesized enantiomers and three previously reported (R) enantiomers were used to formulate two antiferroelectric mixtures. The helical pitch and tilt angle measurements were done using the selective light reflection phenomenon and the electro-optical method, respectively. All the enantiomers exhibit a broad temperature range of the antiferroelectric phase with a high tilt angle. Furthermore, the enantiomer with lateral fluorine substitution in the ortho position has a very long helical pitch (more than 2.0 µm), relatively low enthalpy of melting point, and a tilt angle close to 45 degrees. The designed (R) enantiomers can be useful for formulating binary and multicomponent eutectic mixtures for further utilization in various electro-optic and photonic devices.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21001 - Nano-materials (production and properties)

Project
<a href="/en/project/GF23-42944L" target="_blank" >GF23-42944L: Holographic Blue Phase Photonic Crystals: from microlasers to all-optical switching</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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