Twist grain boundary liquid-crystalline phases under the effect of the magnetic field: A complete 2H and 13C NMR

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F08%3A00312686" target="_blank" >RIV/68378271:_____/08:00312686 - 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

Twist grain boundary liquid-crystalline phases under the effect of the magnetic field: A complete 2H and 13C NMR

Original language description

A rod-like liquid crystalline mesogen containing (S)-2-methylbutyl-(S)-lactate unit in the chiral chain, whose acronym is HZL7/*, has been investigated by means of 2H NMR at two different magnetic fields. This mesogen presents peculiar mesomorphic properties, the TGBA* and TGBC* phases in a wide temperature range up to 60 K, and an additional phase transition from TGBC1* to TGBC2* has been identified. 2H NMR measurements performed on the HZL7/* labelled on the phenyl fragment allowed us to show a peculiar magnetic effect in unwinding the supramolecular structure of both TGBA* and TGBC* phases. Moreover, the analysis of the 2H NMR spectra of HZL7/* allowed us to obtain several structural properties of the studied mesophases, such as the tilt angle of the TGBC* phases and the orientational order parameter referred to the phenyl fragment in the whole mesomorphic range. High resolution 13C NMR study in the unwound TGBA* and TGBC* phases of HZL 7/* is reported.

Czech name

TGB kapalně-krystalické fáze pod vlivem magnetického pole: úplná 2H a 13C NMR spektroskopie

Czech description

Kapalně-krystalický mesogen, jehož tyčinkovitá molekula obsahuje (S)-2-metylbutyl laktátovou jednotku v jádře molekuly, byl studován metodou nukleaární magnetické rezonance (NMR) pro různé velikosti měřícího magnetického pole. Tento mesogen v různých teplotních intervalech vykazuje několik TGB fází, které se pomocí NMR měření podařilo určit a upřesnit strukturu těchto fází.

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

<a href="/en/project/OC%20175" target="_blank" >OC 175: multifunctial liquid crystalline materials</a><br>

Continuities

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

ChemPhysChem

ISSN

1439-4235

e-ISSN

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Volume of the periodical

9

Issue of the periodical within the volume

4

Country of publishing house

DE - GERMANY

Number of pages

11

Pages from-to

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UT code for WoS article

000254461300008

EID of the result in the Scopus database

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