Mesomorphism of novel stilbene-based bent-core liquid crystals
Abstract
A series of asymmetric bent-core liquid crystals, bearing the stilbene moiety in the side wing, was synthesised and characterised. Structural modifications of the non-stilbene wing resulted in formation of various mesophases. Compounds 1 and 3 with an ester linking group between the phenyl rings in this wing have an enantiotropic non-polar smectic-type mesophase, while compound 2, incorporating the biphenyl moiety, has a ferroelectric SmCaPF phase. The molecules of 2 undergo photoisomerisation in solution under UV irradiation, while the mesophases are unstable and UV irradiation leads to irreversible changes. The mesophases of 1 and 3 do not show any electro-optical switching and polarisation current. Applying low frequency AC voltage on a planarly aligned film of compound 2, smectic domains grow, while the birefringence and an image flickering increase. The observed features of these compounds identify stilbene as an attractive moiety in the design of advanced materials based on bent-...core molecules.
Keywords:
Bent-core liquid crystals / stilbene / photoresponsive materials / structure– / property relationshipSource:
Liquid Crystals, 2021, 48, 7, 1054-1064Funding / projects:
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200135 (University of Belgrade, Faculty of Technology and Metallurgy) (RS-200135)
- Ministry of Science, Technological Development and Innovation of the Republic of Serbia, institutional funding - 200287 (Innovation Center of the Faculty of Technology and Metallurgy) (RS-200287)
DOI: 10.1080/02678292.2020.1839800
ISSN: 0267-8292
WoS: 000604017100001
Scopus: 2-s2.0-85098515524
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Tehnološko-metalurški fakultetTY - JOUR AU - Trišović, Nemanja AU - Matović, Luka AU - Toth-Katona, T. AU - Saha, R. AU - Jakli, A. PY - 2021 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4945 AB - A series of asymmetric bent-core liquid crystals, bearing the stilbene moiety in the side wing, was synthesised and characterised. Structural modifications of the non-stilbene wing resulted in formation of various mesophases. Compounds 1 and 3 with an ester linking group between the phenyl rings in this wing have an enantiotropic non-polar smectic-type mesophase, while compound 2, incorporating the biphenyl moiety, has a ferroelectric SmCaPF phase. The molecules of 2 undergo photoisomerisation in solution under UV irradiation, while the mesophases are unstable and UV irradiation leads to irreversible changes. The mesophases of 1 and 3 do not show any electro-optical switching and polarisation current. Applying low frequency AC voltage on a planarly aligned film of compound 2, smectic domains grow, while the birefringence and an image flickering increase. The observed features of these compounds identify stilbene as an attractive moiety in the design of advanced materials based on bent-core molecules. T2 - Liquid Crystals T1 - Mesomorphism of novel stilbene-based bent-core liquid crystals EP - 1064 IS - 7 SP - 1054 VL - 48 DO - 10.1080/02678292.2020.1839800 ER -
@article{ author = "Trišović, Nemanja and Matović, Luka and Toth-Katona, T. and Saha, R. and Jakli, A.", year = "2021", abstract = "A series of asymmetric bent-core liquid crystals, bearing the stilbene moiety in the side wing, was synthesised and characterised. Structural modifications of the non-stilbene wing resulted in formation of various mesophases. Compounds 1 and 3 with an ester linking group between the phenyl rings in this wing have an enantiotropic non-polar smectic-type mesophase, while compound 2, incorporating the biphenyl moiety, has a ferroelectric SmCaPF phase. The molecules of 2 undergo photoisomerisation in solution under UV irradiation, while the mesophases are unstable and UV irradiation leads to irreversible changes. The mesophases of 1 and 3 do not show any electro-optical switching and polarisation current. Applying low frequency AC voltage on a planarly aligned film of compound 2, smectic domains grow, while the birefringence and an image flickering increase. The observed features of these compounds identify stilbene as an attractive moiety in the design of advanced materials based on bent-core molecules.", journal = "Liquid Crystals", title = "Mesomorphism of novel stilbene-based bent-core liquid crystals", pages = "1064-1054", number = "7", volume = "48", doi = "10.1080/02678292.2020.1839800" }
Trišović, N., Matović, L., Toth-Katona, T., Saha, R.,& Jakli, A.. (2021). Mesomorphism of novel stilbene-based bent-core liquid crystals. in Liquid Crystals, 48(7), 1054-1064. https://doi.org/10.1080/02678292.2020.1839800
Trišović N, Matović L, Toth-Katona T, Saha R, Jakli A. Mesomorphism of novel stilbene-based bent-core liquid crystals. in Liquid Crystals. 2021;48(7):1054-1064. doi:10.1080/02678292.2020.1839800 .
Trišović, Nemanja, Matović, Luka, Toth-Katona, T., Saha, R., Jakli, A., "Mesomorphism of novel stilbene-based bent-core liquid crystals" in Liquid Crystals, 48, no. 7 (2021):1054-1064, https://doi.org/10.1080/02678292.2020.1839800 . .