Publication date: May 2016 Source:Progress in Nuclear Magnetic Resonance Spectroscopy, Volumes 94–95
Author(s): Akihiko Sugimura, Geoffrey R. Luckhurst
There have been many investigations of the alignment of nematic liquid crystals by either a magnetic and/or an electric field. The basic features of the important hydrodynamic processes for low molar mass nematics have been characterized for the systems in their equilibrium and non-equilibrium states. These have been created using electric and magnetic fields to align the director and deuterium nuclear magnetic resonance (2H NMR) spectroscopy has been used to explore this alignment. Theoretical models based on continuum theory have been developed to complement the experiments and found to describe successfully the static and the dynamic phenomena observed. Such macroscopic behaviour has been investigated with 2H NMR spectroscopy, in which an electric field in addition to the magnetic field of the spectrometer is used to rotate the director and produce a non-equilibrium state. This powerful technique has proved to be especially valuable for the investigation of nematic liquid crystals. Since the quadrupolar splitting for deuterons observed in the liquid crystal phase is determined by the angle between the director and the magnetic field, time-resolved and time-averaged 2H NMR spectroscopies can be employed to investigate the dynamic director alignment process in a thin nematic film following the application or removal of an electric field. In this article, we describe some seminal studies to illustrate the field-induced static and dynamic director alignment for low molar mass nematics. Graphical abstract
[NMR900 blog] Magnetic Resonance in Chemistry Special Issue: NMR of Liquid Crystals
Magnetic Resonance in Chemistry Special Issue: NMR of Liquid Crystals
Magnetic Resonance in Chemistry
Special Issue: NMR of Liquid CrystalsOctober 2014, Volume 52, Issue 10 Pages 531–663
guest-edited by Ronald Y. Dong (UBC)
Ronald Y. Dong, "MRC special issue on NMR of liquid crystals," (Editorial) Magnetic Resonance in Chemistry 52 (2014) 531. http://dx.doi.org/10.1002/mrc.4109
Canadian contributions
A.P. Manning, M. Giese, A.S. Terpstra, M.J. MacLachlan, W.Y. Hamad, R.Y. Dong and C.A. Michal, "NMR of guest-host systems: 8CB in chiral nematic porous glasses" Magnetic...
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10-17-2014 04:48 PM
NMR of Liquid Crystals - MRC Special Issue
NMR of Liquid Crystals - MRC Special Issue
http://www.spectroscopynow.com/common/images/thumbnails/148f04aecd3.jpgWritten by a host international experts, this special issue covers recent advances in NMR with respect to its applications to the exciting liquid-crystal field.
Read the rest at Spectroscopynow.com
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[NMR images] Shop Nuclear Magnetic Resonance Of Liquid Crystals 2nd Edition Online ...
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NMR pictures
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03-14-2014 07:34 PM
[NMR paper] Signal intensities in (1)H-(13)C CP and INEPT MAS NMR of liquid crystals.
Signal intensities in (1)H-(13)C CP and INEPT MAS NMR of liquid crystals.
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J Magn Reson. 2013 Mar 14;230C:165-175
Authors: Nowacka A, Bongartz NA, Ollila OH, Nylander T, Topgaard D
Abstract
Spectral editing with CP and INEPT in (13)C MAS NMR enables identification of rigid and mobile molecular segments in concentrated assemblies of surfactants, lipids, and/or proteins. In order to get stricter definitions of the terms "rigid" and "mobile", as...
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04-02-2013 07:23 PM
[NMR paper] Signal intensities in 1H-13C CP and INEPT MAS NMR of liquid crystals
Signal intensities in 1H-13C CP and INEPT MAS NMR of liquid crystals
Available online 14 March 2013
Publication year: 2013
Source:Journal of Magnetic Resonance</br>
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Spectral editing with CP and INEPT in 13C MAS NMR enables identification of rigid and mobile molecular segments in concentrated assemblies of surfactants, lipids, and/or proteins. In order to get stricter definitions of the terms “rigid” and “mobile”, as well as resolving some ambiguities in the interpretation of CP and INEPT data, we have developed a theoretical model for calculating the CP and INEPT...
[NMR paper] Characterization of polyacrylamide-stabilized Pfl phage liquid crystals for protein N
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Related Articles Characterization of polyacrylamide-stabilized Pfl phage liquid crystals for protein NMR spectroscopy.
J Biomol NMR. 2002 Jan;22(1):83-7
Authors: Trempe JF, Morin FG, Xia Z, Marchessault RH, Gehring K
A new polymer-stabilized nematic liquid crystal has been characterized for the measurement of biomolecular residual dipolar couplings. Filamentous Pf1 phage were embedded in a polyacrylamide matrix that fixes the orientation of...
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11-24-2010 08:49 PM
[NMR paper] Bicelle-based liquid crystals for NMR-measurement of dipolar couplings at acidic and
Bicelle-based liquid crystals for NMR-measurement of dipolar couplings at acidic and basic pH values.
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J Biomol NMR. 1999 Feb;13(2):187-91
Authors: Ottiger M, Bax A
It is demonstrated that mixtures of ditetradecyl-phosphatidylcholine or didodecyl-phoshatidylcholine and dihexyl-phosphatidylcholine in water from lyotropic liquid crystalline phases under similar conditions as previously reported for bicelles consisting of...
Deuterium NMR investigations of field-induced director alignment in nematic liquid crystals
Linear Mode
