Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid
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 mes...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-10-01
|
| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/11/10/1215 |
| _version_ | 1797514972210659328 |
|---|---|
| author | Catalina Ionica Ciobanu Iulian Berladean Elena-Luiza Epure Aurel Simion Gabriela Lisa Yahia Boussoualem Irina Carlescu |
| author_facet | Catalina Ionica Ciobanu Iulian Berladean Elena-Luiza Epure Aurel Simion Gabriela Lisa Yahia Boussoualem Irina Carlescu |
| author_sort | Catalina Ionica Ciobanu |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T06:39:05Z |
| format | Article |
| id | doaj.art-f9bac680b6b6461f9defc70c102fbbad |
| institution | Directory Open Access Journal |
| issn | 2073-4352 |
| language | English |
| last_indexed | 2024-03-10T06:39:05Z |
| publishDate | 2021-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj.art-f9bac680b6b6461f9defc70c102fbbad2023-11-22T17:53:25ZengMDPI AGCrystals2073-43522021-10-011110121510.3390/cryst11101215Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic AcidCatalina Ionica Ciobanu0Iulian Berladean1Elena-Luiza Epure2Aurel Simion3Gabriela Lisa4Yahia Boussoualem5Irina Carlescu6Institute of Interdisciplinary Research-CERNESIM Centre, Alexandru Ioan Cuza University of Iasi, 11 Carol I, 700506 Iasi, Romania“Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University, 700050 Iasi, Romania“Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University, 700050 Iasi, Romania“Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University, 700050 Iasi, Romania“Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University, 700050 Iasi, RomaniaUnité de Dynamique et Structure de Matériaux Moléculaires, Universite du Littoral-Cote-d’Opale, 59140 Dunkerque, France“Cristofor Simionescu” Faculty of Chemical Engineering and Environmental Protection, “Gheorghe Asachi” Technical University, 700050 Iasi, RomaniaBent-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.https://www.mdpi.com/2073-4352/11/10/1215bent-core liquid crystalsisophthalic and resorcinol derivativesmesophase stability |
| spellingShingle | Catalina Ionica Ciobanu Iulian Berladean Elena-Luiza Epure Aurel Simion Gabriela Lisa Yahia Boussoualem Irina Carlescu Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid Crystals bent-core liquid crystals isophthalic and resorcinol derivatives mesophase stability |
| title | Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid |
| title_full | Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid |
| title_fullStr | Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid |
| title_full_unstemmed | Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid |
| title_short | Mesomorphic and Thermal Behavior of Symmetric Bent-Core Liquid Crystal Compounds Derived from Resorcinol and Isophthalic Acid |
| title_sort | mesomorphic and thermal behavior of symmetric bent core liquid crystal compounds derived from resorcinol and isophthalic acid |
| topic | bent-core liquid crystals isophthalic and resorcinol derivatives mesophase stability |
| url | https://www.mdpi.com/2073-4352/11/10/1215 |
| work_keys_str_mv | AT catalinaionicaciobanu mesomorphicandthermalbehaviorofsymmetricbentcoreliquidcrystalcompoundsderivedfromresorcinolandisophthalicacid AT iulianberladean mesomorphicandthermalbehaviorofsymmetricbentcoreliquidcrystalcompoundsderivedfromresorcinolandisophthalicacid AT elenaluizaepure mesomorphicandthermalbehaviorofsymmetricbentcoreliquidcrystalcompoundsderivedfromresorcinolandisophthalicacid AT aurelsimion mesomorphicandthermalbehaviorofsymmetricbentcoreliquidcrystalcompoundsderivedfromresorcinolandisophthalicacid AT gabrielalisa mesomorphicandthermalbehaviorofsymmetricbentcoreliquidcrystalcompoundsderivedfromresorcinolandisophthalicacid AT yahiaboussoualem mesomorphicandthermalbehaviorofsymmetricbentcoreliquidcrystalcompoundsderivedfromresorcinolandisophthalicacid AT irinacarlescu mesomorphicandthermalbehaviorofsymmetricbentcoreliquidcrystalcompoundsderivedfromresorcinolandisophthalicacid |