Helical twisting power and compatibility in twisted nematic phase of new chiral liquid crystalline dopants with various liquid crystalline matrices

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00511155" target="_blank" >RIV/68378271:_____/19:00511155 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/19:10405888

Výsledek na webu

<a href="https://doi.org/10.1080/02678292.2019.1599454" target="_blank" >https://doi.org/10.1080/02678292.2019.1599454</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/02678292.2019.1599454" target="_blank" >10.1080/02678292.2019.1599454</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Helical twisting power and compatibility in twisted nematic phase of new chiral liquid crystalline dopants with various liquid crystalline matrices

Popis výsledku v původním jazyce

Chiral dopants exhibiting smectic phases were prepared and their helical twisting power (HTP) and thermal phase behaviour in mixtures with LC hosts were studied. The influence of host LC on HTP was evaluated and generally higher values were found for hosts with high birefringence. High enhancement was found for LC-chiral dopant pair both having similar aromatic core. Chiral dopants exhibited limited compatibility with LC hosts in twisted nematic phase at room temperature. For one mixture, single twisted nematic phase with selective light reflection band with maximum at wavelength about 1.0 µm was obtained. Carboxylic acid dopants exhibited total compatibility with the host in single twisted nematic phase at elevated temperatures, allowing preparation of mixtures with reflection band in the visible range, blue phases were observed, too. Intermolecular hydrogen bonding between acid proton and pyridine nitrogen of dopants was found.

Název v anglickém jazyce

Helical twisting power and compatibility in twisted nematic phase of new chiral liquid crystalline dopants with various liquid crystalline matrices

Popis výsledku anglicky

Chiral dopants exhibiting smectic phases were prepared and their helical twisting power (HTP) and thermal phase behaviour in mixtures with LC hosts were studied. The influence of host LC on HTP was evaluated and generally higher values were found for hosts with high birefringence. High enhancement was found for LC-chiral dopant pair both having similar aromatic core. Chiral dopants exhibited limited compatibility with LC hosts in twisted nematic phase at room temperature. For one mixture, single twisted nematic phase with selective light reflection band with maximum at wavelength about 1.0 µm was obtained. Carboxylic acid dopants exhibited total compatibility with the host in single twisted nematic phase at elevated temperatures, allowing preparation of mixtures with reflection band in the visible range, blue phases were observed, too. Intermolecular hydrogen bonding between acid proton and pyridine nitrogen of dopants was found.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10401 - Organic chemistry

Projekt

<a href="/cs/project/GA19-03564S" target="_blank" >GA19-03564S: Inteligentní supramolekulární fotochromní nanostruktury</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Liquid Crystals

ISSN

0267-8292

e-ISSN

—

Svazek periodika

46

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

1769-1779

Kód UT WoS článku

000494326800004

EID výsledku v databázi Scopus

2-s2.0-85064629911