2H-NMR of the induced chiral phases of acrylate-metacrylate liquid crystalline copolymers

Evgueni Barmatov, Lucia Calucci, Donata Catalano, Leonardo Chiezzi, Carlo Alberto Veracini, K. Fodor-Csorba

Research output: Contribution to journalArticle

Abstract

It is shown that the addition of 2 to 6wt. % of a chiral dopant (CD) to a series of nematic copolymers (Pn) induces blue and cholesteric mesophases. The mesomorphic behaviour of various CD + Pn mixtures is investigated by polarized optical microscopy and the phase transition temperatures are determined by DSC measurements. Deuterium NMR spectra are recorded as a function of temperature within the mesophases and the spectral line shapes characteristic of different local orientational order parameters and orientational ordering processes of molecules in a magnetic field are observed depending on temperature, heating or cooling process, chiral dopant concentration, copolymer composition, and magnetic field strength.

Original languageEnglish
Pages (from-to)181-191
Number of pages11
JournalMolecular Crystals and Liquid Crystals
Volume429
DOIs
Publication statusPublished - 2005

Fingerprint

acrylates
copolymers
Copolymers
Doping (additives)
Nuclear magnetic resonance
Crystalline materials
nuclear magnetic resonance
Liquids
liquids
magnetic fields
Magnetic fields
line spectra
line shape
deuterium
field strength
Deuterium
transition temperature
microscopy
cooling
Superconducting transition temperature

Keywords

  • Blue phases
  • Cholestric phases
  • Deuterium NMR
  • Induced chirality
  • Polymeric liquid crystals

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

2H-NMR of the induced chiral phases of acrylate-metacrylate liquid crystalline copolymers. / Barmatov, Evgueni; Calucci, Lucia; Catalano, Donata; Chiezzi, Leonardo; Veracini, Carlo Alberto; Fodor-Csorba, K.

In: Molecular Crystals and Liquid Crystals, Vol. 429, 2005, p. 181-191.

Research output: Contribution to journalArticle

Barmatov, Evgueni ; Calucci, Lucia ; Catalano, Donata ; Chiezzi, Leonardo ; Veracini, Carlo Alberto ; Fodor-Csorba, K. / 2H-NMR of the induced chiral phases of acrylate-metacrylate liquid crystalline copolymers. In: Molecular Crystals and Liquid Crystals. 2005 ; Vol. 429. pp. 181-191.
@article{ac19e7e00413410880ef94d10aa74d52,
title = "2H-NMR of the induced chiral phases of acrylate-metacrylate liquid crystalline copolymers",
abstract = "It is shown that the addition of 2 to 6wt. {\%} of a chiral dopant (CD) to a series of nematic copolymers (Pn) induces blue and cholesteric mesophases. The mesomorphic behaviour of various CD + Pn mixtures is investigated by polarized optical microscopy and the phase transition temperatures are determined by DSC measurements. Deuterium NMR spectra are recorded as a function of temperature within the mesophases and the spectral line shapes characteristic of different local orientational order parameters and orientational ordering processes of molecules in a magnetic field are observed depending on temperature, heating or cooling process, chiral dopant concentration, copolymer composition, and magnetic field strength.",
keywords = "Blue phases, Cholestric phases, Deuterium NMR, Induced chirality, Polymeric liquid crystals",
author = "Evgueni Barmatov and Lucia Calucci and Donata Catalano and Leonardo Chiezzi and Veracini, {Carlo Alberto} and K. Fodor-Csorba",
year = "2005",
doi = "10.1080/15421400590930926",
language = "English",
volume = "429",
pages = "181--191",
journal = "Molecular Crystals and Liquid Crystals",
issn = "0026-8941",
publisher = "Taylor and Francis Ltd.",

}

TY - JOUR

T1 - 2H-NMR of the induced chiral phases of acrylate-metacrylate liquid crystalline copolymers

AU - Barmatov, Evgueni

AU - Calucci, Lucia

AU - Catalano, Donata

AU - Chiezzi, Leonardo

AU - Veracini, Carlo Alberto

AU - Fodor-Csorba, K.

PY - 2005

Y1 - 2005

N2 - It is shown that the addition of 2 to 6wt. % of a chiral dopant (CD) to a series of nematic copolymers (Pn) induces blue and cholesteric mesophases. The mesomorphic behaviour of various CD + Pn mixtures is investigated by polarized optical microscopy and the phase transition temperatures are determined by DSC measurements. Deuterium NMR spectra are recorded as a function of temperature within the mesophases and the spectral line shapes characteristic of different local orientational order parameters and orientational ordering processes of molecules in a magnetic field are observed depending on temperature, heating or cooling process, chiral dopant concentration, copolymer composition, and magnetic field strength.

AB - It is shown that the addition of 2 to 6wt. % of a chiral dopant (CD) to a series of nematic copolymers (Pn) induces blue and cholesteric mesophases. The mesomorphic behaviour of various CD + Pn mixtures is investigated by polarized optical microscopy and the phase transition temperatures are determined by DSC measurements. Deuterium NMR spectra are recorded as a function of temperature within the mesophases and the spectral line shapes characteristic of different local orientational order parameters and orientational ordering processes of molecules in a magnetic field are observed depending on temperature, heating or cooling process, chiral dopant concentration, copolymer composition, and magnetic field strength.

KW - Blue phases

KW - Cholestric phases

KW - Deuterium NMR

KW - Induced chirality

KW - Polymeric liquid crystals

UR - http://www.scopus.com/inward/record.url?scp=33644811342&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33644811342&partnerID=8YFLogxK

U2 - 10.1080/15421400590930926

DO - 10.1080/15421400590930926

M3 - Article

AN - SCOPUS:33644811342

VL - 429

SP - 181

EP - 191

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

SN - 0026-8941

ER -