Laterally substituted biphenyl benzoates - synthesis and mesomorphic properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00541639" target="_blank" >RIV/68378271:_____/21:00541639 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1080/02678292.2020.1794069" target="_blank" >https://doi.org/10.1080/02678292.2020.1794069</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/02678292.2020.1794069" target="_blank" >10.1080/02678292.2020.1794069</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Laterally substituted biphenyl benzoates - synthesis and mesomorphic properties

Popis výsledku v původním jazyce

We have synthesised several series of dialkoxy-terminated biphenyl benzoates with lateral substituents (F, Cl) in the vicinity of the ester linking group, varying the length of the terminal alkyl chains. The aim was to study mesomorphic properties of these new compounds and compare them with the previously reported analogous phenyl biphenylcarboxylates, which possess reverse orientation of the ester linking group. The studied compounds were characterised by differential scanning calorimetry, polarising optical microscopy and birefringence measurements. For selected homologues, the type of mesophases was confirmed by x-ray scattering analysis. We calculated the dipole moments and suggested its correlation with the preference of tilted smectic phases in studied biphenyl benzoates. Generally, lateral substitution causes the drop of phase transition temperatures as well as melting points, giving rise to mesophases in a wide temperature range, in several cases down to the room temperature.

Název v anglickém jazyce

Laterally substituted biphenyl benzoates - synthesis and mesomorphic properties

Popis výsledku anglicky

We have synthesised several series of dialkoxy-terminated biphenyl benzoates with lateral substituents (F, Cl) in the vicinity of the ester linking group, varying the length of the terminal alkyl chains. The aim was to study mesomorphic properties of these new compounds and compare them with the previously reported analogous phenyl biphenylcarboxylates, which possess reverse orientation of the ester linking group. The studied compounds were characterised by differential scanning calorimetry, polarising optical microscopy and birefringence measurements. For selected homologues, the type of mesophases was confirmed by x-ray scattering analysis. We calculated the dipole moments and suggested its correlation with the preference of tilted smectic phases in studied biphenyl benzoates. Generally, lateral substitution causes the drop of phase transition temperatures as well as melting points, giving rise to mesophases in a wide temperature range, in several cases down to the room temperature.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10401 - Organic chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

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

1366-5855

Svazek periodika

48

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

526-536

Kód UT WoS článku

000550969600001

EID výsledku v databázi Scopus

2-s2.0-85088471929