English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Structural insights into the twist-bend nematic phase from the integration of 2H-NMR data and modelling: CB7CB and CB6OCB as case studies

Greco, C., Ferrarini, A., Luckhurst, G. R., Timimi, B. A., & Zimmermann, H. (2018). Structural insights into the twist-bend nematic phase from the integration of 2H-NMR data and modelling: CB7CB and CB6OCB as case studies. Liquid Crystals, 45(13-15), 2361-2375. doi:10.1080/02678292.2018.1516304.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0002-7425-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0002-C145-6
Genre: Journal Article

Files

show Files
hide Files
:
LiqCryst_45_2018_2361.pdf (Any fulltext), 3MB
 
File Permalink:
-
Name:
LiqCryst_45_2018_2361.pdf
Description:
-
Visibility:
Restricted (Max Planck Institute for Medical Research, Heidelberg; )
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Creators

show
hide
 Creators:
Greco, Cristina, Author
Ferrarini, Alberta, Author
Luckhurst, Geoffrey R., Author
Timimi, Bakir A., Author
Zimmermann, Herbert1, Author              
Affiliations:
1Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society, ou_1497700              

Content

show
hide
Free keywords: Twist-bend nematic, 2H-NMR, molecular modelling, theory-experiment integration, molecular bend angle, heliconical structure, liquid crystal dimers, conical angle
 Abstract: The appearance of some special features in 2H-NMR spectra, which could not be explained by the conventional nematic order, was crucial for the discovery of the twist-bend nematic (NTB) phase. Such features reflect the order and symmetry of the local environment of a probe and in principle their analysis can provide quantitative insights into the structural parameters of the phase. We have developed a methodology for the analysis of experimental data, different from the approaches that are normally used for two main reasons: (i) the structural features of the NTB phase, specifically its local polarity, biaxiality and chirality, are consistently taken into account; (ii) the molecular features are introduced in a detailed way, through molecular modelling. We have applied this methodology to analyse 2H-NMR quadrupolar splittings for two representative systems, CB7CB and CB6OCB. The integration of theory, computational modelling and experiment allows us to extract quantitative information from the experimental data and to predict various properties, even not directly probed by measurements. We discuss how the molecular differences between CB7CB and CB6OCB translate into a different phase behaviour and we address issues concerning the distinguishing features of the NTB phase, such as the definition of a local tilted director.

Details

show
hide
Language(s): eng - English
 Dates: 2018-07-032018-11-082018
 Publication Status: Published in print
 Pages: 15
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1080/02678292.2018.1516304
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Liquid Crystals
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: London : Taylor & Francis
Pages: - Volume / Issue: 45 (13-15) Sequence Number: - Start / End Page: 2361 - 2375 Identifier: ISSN: 0267-8292
CoNE: https://pure.mpg.de/cone/journals/resource/954925268301