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Volume 11
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10.3390/cryst11101215
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Article

Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid

by
Catalina Ionica Ciobanu
1,
Iulian Berladean
2,
Elena-Luiza Epure
2,*,
Aurel Simion
2,
Gabriela Lisa
2,
Yahia Boussoualem
3 and
Irina Carlescu
2,*
1
Institute of Interdisciplinary Research-CERNESIM Centre, Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania
2
“Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University, 700050 Iasi, Romania
3
Unité de Dynamique et Structure de Matériaux Moléculaires, Universite du Littoral-Cote-d’Opale, 59140 Dunkerque, France
*
Authors to whom correspondence should be addressed.
Crystals 2021, 11(10), 1215; https://doi.org/10.3390/cryst11101215
Submission received: 20 September 2021 / Revised: 5 October 2021 / Accepted: 6 October 2021 / Published: 8 October 2021
(This article belongs to the Special Issue Synthesis and Properties of Light-Emitting Liquid Crystals (Volume II))
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Abstract

Bent-core liquid crystals (BCLC) have been widely studied as a result of their unusual polar and chiral properties. Similar to calamitic and discotic molecules, BCLC molecules also exhibit nematic phases, besides other higher order mesophases. The aim of this work is to comparatively analyze the mesomorphic behavior of some bent-core 1,3-disubstituted benzene core compounds derived from resorcinol and isophthalic acid. Thus, the two classes of compounds differ in the nature of the orientation of the ester bond between the benzene central core and the two branches attached to the core. The mesomorphic behavior was elucidated by polarized light optical microscopy and differential calorimetry. Given the relatively high isotropic points of the compounds, confirmation of the thermal stability in the domains manifesting liquid crystalline properties was performed by thermogravimetric studies. The theoretical explanation of the difference in mesomorphic behavior for the two classes was based on molecular modeling studies.
Keywords: bent-core liquid crystals; isophthalic and resorcinol derivatives; mesophase stability bent-core liquid crystals; isophthalic and resorcinol derivatives; mesophase stability
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MDPI and ACS Style

Ciobanu, C.I.; Berladean, I.; Epure, E.-L.; Simion, A.; Lisa, G.; Boussoualem, Y.; Carlescu, I. Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid. Crystals 2021, 11, 1215. https://doi.org/10.3390/cryst11101215

AMA Style

Ciobanu CI, Berladean I, Epure E-L, Simion A, Lisa G, Boussoualem Y, Carlescu I. Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid. Crystals. 2021; 11(10):1215. https://doi.org/10.3390/cryst11101215

Chicago/Turabian Style

Ciobanu, Catalina Ionica, Iulian Berladean, Elena-Luiza Epure, Aurel Simion, Gabriela Lisa, Yahia Boussoualem, and Irina Carlescu. 2021. "Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid" Crystals 11, no. 10: 1215. https://doi.org/10.3390/cryst11101215

APA Style

Ciobanu, C. I., Berladean, I., Epure, E.-L., Simion, A., Lisa, G., Boussoualem, Y., & Carlescu, I. (2021). Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid. Crystals, 11(10), 1215. https://doi.org/10.3390/cryst11101215

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