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Magnetic alignment study of rare-earth-containing liquid crystals

Yury G Galyametdinov, Wolfgang Haase, Bart Goderis, Dries Moors, Kris Driesen, Rik Van Deun UGent and Koen Binnemans (2007) JOURNAL OF PHYSICAL CHEMISTRY B. 111(50). p.13881-13885
abstract
The liquid-crystalline rare-earth complexes of the type [Ln(LH)(3)(DOS)(3)]-where Ln is Tb, Dy, Ho, Er, Tm, or Yb; LH is the Schiff base N-octadecyl-4-tetradecyloxysalicylaldimine; and DOS is dodecylsulfate-exhibit a smectic A phase. Because of the presence of rare-earth ions with a large magnetic anisotropy, the smectic A phase of these liquid crystals can be easier aligned in an external magnetic field than smectic A phases of conventional liquid crystals. The magnetic anisotropy of the [Ln(LH)3(DOS)31 complexes was determined by measurement of the temperature-dependence of the magnetic susceptibility using a Faraday balance. The highest value for the magnetic anisotropy was found for the dysprosium(III) complex. The magnetic alignment of these liquid crystals was studied by time-resolved synchrotron small-angle X-ray scattering experiments. Depending on the sign of the magnetic anisotropy, the director of the liquid-crystalline molecules was aligned parallel or perpendicular to the magnetic field lines. A positive value of the magnetic anisotropy (and parallel alignment) was found for the thulium(III) and the ytterbium(III) complexes, whereas a negative value of the magnetic anisotropy (and perpendicular alignment) was observed for the terbium(III) and dysprosium(III) complexes.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
FIELD-INDUCED ALIGNMENT, LANTHANIDE-CONTAINING METALLOMESOGENS, SCHIFFS BASES, X-RAY, ANISOTROPY, COMPLEXES, SUSCEPTIBILITY, ORIENTATION, BEHAVIOR, MESOMORPHISM
journal title
JOURNAL OF PHYSICAL CHEMISTRY B
J. Phys. Chem. B
volume
111
issue
50
pages
13881 - 13885
Web of Science type
Article
Web of Science id
000251615400004
JCR category
CHEMISTRY, PHYSICAL
JCR impact factor
4.086 (2007)
JCR rank
19/107 (2007)
JCR quartile
1 (2007)
ISSN
1520-6106
DOI
10.1021/jp0771724
language
English
UGent publication?
no
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
1190106
handle
http://hdl.handle.net/1854/LU-1190106
date created
2011-03-16 16:13:27
date last changed
2018-01-29 12:12:12
@article{1190106,
  abstract     = {The liquid-crystalline rare-earth complexes of the type [Ln(LH)(3)(DOS)(3)]-where Ln is Tb, Dy, Ho, Er, Tm, or Yb; LH is the Schiff base N-octadecyl-4-tetradecyloxysalicylaldimine; and DOS is dodecylsulfate-exhibit a smectic A phase. Because of the presence of rare-earth ions with a large magnetic anisotropy, the smectic A phase of these liquid crystals can be easier aligned in an external magnetic field than smectic A phases of conventional liquid crystals. The magnetic anisotropy of the [Ln(LH)3(DOS)31 complexes was determined by measurement of the temperature-dependence of the magnetic susceptibility using a Faraday balance. The highest value for the magnetic anisotropy was found for the dysprosium(III) complex. The magnetic alignment of these liquid crystals was studied by time-resolved synchrotron small-angle X-ray scattering experiments. Depending on the sign of the magnetic anisotropy, the director of the liquid-crystalline molecules was aligned parallel or perpendicular to the magnetic field lines. A positive value of the magnetic anisotropy (and parallel alignment) was found for the thulium(III) and the ytterbium(III) complexes, whereas a negative value of the magnetic anisotropy (and perpendicular alignment) was observed for the terbium(III) and dysprosium(III) complexes.},
  author       = {Galyametdinov, Yury G and Haase, Wolfgang and Goderis, Bart and Moors, Dries and Driesen, Kris and Van Deun, Rik and Binnemans, Koen},
  issn         = {1520-6106},
  journal      = {JOURNAL OF PHYSICAL CHEMISTRY B},
  keyword      = {FIELD-INDUCED ALIGNMENT,LANTHANIDE-CONTAINING METALLOMESOGENS,SCHIFFS BASES,X-RAY,ANISOTROPY,COMPLEXES,SUSCEPTIBILITY,ORIENTATION,BEHAVIOR,MESOMORPHISM},
  language     = {eng},
  number       = {50},
  pages        = {13881--13885},
  title        = {Magnetic alignment study of rare-earth-containing liquid crystals},
  url          = {http://dx.doi.org/10.1021/jp0771724},
  volume       = {111},
  year         = {2007},
}

Chicago
Galyametdinov, Yury G, Wolfgang Haase, Bart Goderis, Dries Moors, Kris Driesen, Rik Van Deun, and Koen Binnemans. 2007. “Magnetic Alignment Study of Rare-earth-containing Liquid Crystals.” Journal of Physical Chemistry B 111 (50): 13881–13885.
APA
Galyametdinov, Y. G., Haase, W., Goderis, B., Moors, D., Driesen, K., Van Deun, R., & Binnemans, K. (2007). Magnetic alignment study of rare-earth-containing liquid crystals. JOURNAL OF PHYSICAL CHEMISTRY B, 111(50), 13881–13885.
Vancouver
1.
Galyametdinov YG, Haase W, Goderis B, Moors D, Driesen K, Van Deun R, et al. Magnetic alignment study of rare-earth-containing liquid crystals. JOURNAL OF PHYSICAL CHEMISTRY B. 2007;111(50):13881–5.
MLA
Galyametdinov, Yury G, Wolfgang Haase, Bart Goderis, et al. “Magnetic Alignment Study of Rare-earth-containing Liquid Crystals.” JOURNAL OF PHYSICAL CHEMISTRY B 111.50 (2007): 13881–13885. Print.