Synthesis and mesomorphic properties of new compounds exhibiting TGBA and TGBC liquid crystalline phases

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F08%3A00308592" target="_blank" >RIV/68378271:_____/08:00308592 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Synthesis and mesomorphic properties of new compounds exhibiting TGBA and TGBC liquid crystalline phases

Original language description

We synthesized a series of rod-like mesogens with a (S)-2-methylbutyl-(S)-lactate unit in the chiral chain that exhibited extremely wide temperature ranges in the TGBA and TGBC* phases. TGB phases were identified, based on typical textures in confined samples and in free-standing films, by Grandjean-Cano texture and by NMR studies on a deuterium-labelled isotopomer. Temperature dependencies of relaxation frequency, dielectric strength, selective reflection and layer spacing showed anomalies at a certaintemperature within the TGBC* phase range. Also, changes in textures, as well as in 2H NMR spectra, occurred at this same temperature. These results suggest the existence of two TGBC* phases.

Czech name

Syntéza a mezomorfní vlastnosti nových sloučenin s TGB kapalně-krystalickými fázemi

Czech description

Syntetizovali jsme sérii mesogenů s protáhlým tvarem molekul s (S)-2-metylbutyl-(S)-laktátem v chirální části molekuly. Studovali jsme mezomorfní chování těchto látek a zjistili přítomnost TGB fází v extrémně širokém teplotním oboru. TGB fáze byly identifikovány na základě studia optických textur v polarizačním mikroskopu a NMR spektroskopie na izomeru obohaceném deuteriem.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

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

Name of the periodical

Liquid Crystals

ISSN

0267-8292

e-ISSN

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Volume of the periodical

35

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

287-298

UT code for WoS article

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EID of the result in the Scopus database

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