Design and synthesis of photoresponsive bent-core liquid crystals exhibiting polar smectic phases

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00639037" target="_blank" >RIV/68378271:_____/25:00639037 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43933721

Výsledek na webu

<a href="https://hdl.handle.net/11104/0369551" target="_blank" >https://hdl.handle.net/11104/0369551</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d5ma00379b" target="_blank" >10.1039/d5ma00379b</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Design and synthesis of photoresponsive bent-core liquid crystals exhibiting polar smectic phases

Popis výsledku v původním jazyce

Bent-core liquid crystals represent a fascinating class of self-assembling materials. This is due their unique organized fluidic states – mesophases – that are widely studied for their electrooptical and optical responses. We designed and synthesized two series of mesogens based on laterally substituted 3-hydroxybenzoic acid and tuned their properties by changing the linking group in both side-arms. Using polarizing optical microscopy, differential scanning calorimetry and x-ray diffraction, we have established the mesomorphic properties and found several types of smectic mesophases. For homologues comprising the photosensitive azo group, we have studied their switching ability in a solution as well as in mesophases employing external UV light irradiation. We have confirmed the ability of the materials to completely undergo the light-induced switching from a mesophase to isotropic liquid by on-line illumination of an x-ray sample. Unlike previously studied compounds of related structure, the studied compounds exhibited thermally unstable nematic phases and stable enantiotropic antiferroelectric polar smectic C phases. A transition from a an apolar SmC to SmCAPA phase is also documented.

Název v anglickém jazyce

Design and synthesis of photoresponsive bent-core liquid crystals exhibiting polar smectic phases

Popis výsledku anglicky

Bent-core liquid crystals represent a fascinating class of self-assembling materials. This is due their unique organized fluidic states – mesophases – that are widely studied for their electrooptical and optical responses. We designed and synthesized two series of mesogens based on laterally substituted 3-hydroxybenzoic acid and tuned their properties by changing the linking group in both side-arms. Using polarizing optical microscopy, differential scanning calorimetry and x-ray diffraction, we have established the mesomorphic properties and found several types of smectic mesophases. For homologues comprising the photosensitive azo group, we have studied their switching ability in a solution as well as in mesophases employing external UV light irradiation. We have confirmed the ability of the materials to completely undergo the light-induced switching from a mesophase to isotropic liquid by on-line illumination of an x-ray sample. Unlike previously studied compounds of related structure, the studied compounds exhibited thermally unstable nematic phases and stable enantiotropic antiferroelectric polar smectic C phases. A transition from a an apolar SmC to SmCAPA phase is also documented.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/8J23FR017" target="_blank" >8J23FR017: Mesogeny pro organickou elektroniku a sensory (MESOS)</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Advances

ISSN

2633-5409

e-ISSN

2633-5409

Svazek periodika

6

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

10

Strana od-do

6469-6478

Kód UT WoS článku

001548384100001

EID výsledku v databázi Scopus

2-s2.0-105016085771