Induction of the Orthogonal Smectic A Phase in Mixtures of Nematic Tolanes with Positive and Negative Dielectric Anisotropy
Induction of the orthogonal smectic A phase occurs in mixtures of nematic compounds with positive and negative dielectric anisotropy. The aim of this work is to determine influence of a molecular structure of compounds on the induction strength of this phase. Cyclohexyl tolanes with the terminal gro...
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| Language: | English |
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Military University of Technology, Warsaw
2022-09-01
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| Series: | Biuletyn Wojskowej Akademii Technicznej |
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| Online Access: | http://biuletynwat.pl/gicid/01.3001.0053.6737 |
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| author | Paulina Zieja Barbara Klucznik Marzena Tykarska |
| author_facet | Paulina Zieja Barbara Klucznik Marzena Tykarska |
| author_sort | Paulina Zieja |
| collection | DOAJ |
| description | Induction of the orthogonal smectic A phase occurs in mixtures of nematic compounds with positive and negative dielectric anisotropy. The aim of this work is to determine influence of a molecular structure of compounds on the induction strength of this phase. Cyclohexyl tolanes with the terminal group ‒OCF3, differing with a lateral substitution of a rigid core with fluorine atoms, were mixed with tolanes with two fluorine atoms in a lateral position and different lengths of a terminal alkoxy chain. Based on phase diagrams, obtained with the use of a polarising optical microscope, the influence of a structure of both types of compounds on the induction of the SmA phase is presented. Both, an increase in a number of fluorine atoms in a rigid core and a decrease in an alkoxy chain length cause a decrease in the strength of the SmA phase induction in the investigated systems.Keywords: chemistry, liquid crystals, smectic A phase induction, miscibility studies |
| first_indexed | 2024-03-12T00:58:19Z |
| format | Article |
| id | doaj.art-9c0f4e8d9de24cde8e2814cae4f17da0 |
| institution | Directory Open Access Journal |
| issn | 1234-5865 |
| language | English |
| last_indexed | 2024-03-12T00:58:19Z |
| publishDate | 2022-09-01 |
| publisher | Military University of Technology, Warsaw |
| record_format | Article |
| series | Biuletyn Wojskowej Akademii Technicznej |
| spelling | doaj.art-9c0f4e8d9de24cde8e2814cae4f17da02023-09-14T11:22:43ZengMilitary University of Technology, WarsawBiuletyn Wojskowej Akademii Technicznej1234-58652022-09-01713152910.5604/01.3001.0053.673701.3001.0053.6737Induction of the Orthogonal Smectic A Phase in Mixtures of Nematic Tolanes with Positive and Negative Dielectric AnisotropyPaulina Zieja0Barbara Klucznik1Marzena Tykarska2Military University of Technology, Faculty of Advanced Technologies and Chemistry, Institute of Chemistry, 2 gen. S. Kaliskiego Str., 00-908 Warsaw, PolandMilitary University of Technology, Faculty of Advanced Technologies and Chemistry, Institute of Chemistry, 2 gen. S. Kaliskiego Str., 00-908 Warsaw, PolandMilitary University of Technology, Faculty of Advanced Technologies and Chemistry, Institute of Chemistry, 2 gen. S. Kaliskiego Str., 00-908 Warsaw, PolandInduction of the orthogonal smectic A phase occurs in mixtures of nematic compounds with positive and negative dielectric anisotropy. The aim of this work is to determine influence of a molecular structure of compounds on the induction strength of this phase. Cyclohexyl tolanes with the terminal group ‒OCF3, differing with a lateral substitution of a rigid core with fluorine atoms, were mixed with tolanes with two fluorine atoms in a lateral position and different lengths of a terminal alkoxy chain. Based on phase diagrams, obtained with the use of a polarising optical microscope, the influence of a structure of both types of compounds on the induction of the SmA phase is presented. Both, an increase in a number of fluorine atoms in a rigid core and a decrease in an alkoxy chain length cause a decrease in the strength of the SmA phase induction in the investigated systems.Keywords: chemistry, liquid crystals, smectic A phase induction, miscibility studieshttp://biuletynwat.pl/gicid/01.3001.0053.6737chemistryliquid crystalssmectic A phase inductionmiscibility studies |
| spellingShingle | Paulina Zieja Barbara Klucznik Marzena Tykarska Induction of the Orthogonal Smectic A Phase in Mixtures of Nematic Tolanes with Positive and Negative Dielectric Anisotropy Biuletyn Wojskowej Akademii Technicznej chemistry liquid crystals smectic A phase induction miscibility studies |
| title | Induction of the Orthogonal Smectic A Phase in Mixtures of Nematic Tolanes with Positive and Negative Dielectric Anisotropy |
| title_full | Induction of the Orthogonal Smectic A Phase in Mixtures of Nematic Tolanes with Positive and Negative Dielectric Anisotropy |
| title_fullStr | Induction of the Orthogonal Smectic A Phase in Mixtures of Nematic Tolanes with Positive and Negative Dielectric Anisotropy |
| title_full_unstemmed | Induction of the Orthogonal Smectic A Phase in Mixtures of Nematic Tolanes with Positive and Negative Dielectric Anisotropy |
| title_short | Induction of the Orthogonal Smectic A Phase in Mixtures of Nematic Tolanes with Positive and Negative Dielectric Anisotropy |
| title_sort | induction of the orthogonal smectic a phase in mixtures of nematic tolanes with positive and negative dielectric anisotropy |
| topic | chemistry liquid crystals smectic A phase induction miscibility studies |
| url | http://biuletynwat.pl/gicid/01.3001.0053.6737 |
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