Magnetic alignment study of rare-earth-containing liquid crystals
- Author
- Yury G Galyametdinov, Wolfgang Haase, Bart Goderis, Dries Moors, Kris Driesen, Rik Van Deun (UGent) and Koen Binnemans
- Organization
- 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.
- Keywords
- FIELD-INDUCED ALIGNMENT, LANTHANIDE-CONTAINING METALLOMESOGENS, SCHIFFS BASES, X-RAY, ANISOTROPY, COMPLEXES, SUSCEPTIBILITY, ORIENTATION, BEHAVIOR, MESOMORPHISM
Downloads
-
(...).pdf
- full text
- |
- UGent only
- |
- |
- 251.29 KB
Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-1190106
- MLA
- Galyametdinov, Yury G., et al. “Magnetic Alignment Study of Rare-Earth-Containing Liquid Crystals.” JOURNAL OF PHYSICAL CHEMISTRY B, vol. 111, no. 50, 2007, pp. 13881–85, doi:10.1021/jp0771724.
- 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. https://doi.org/10.1021/jp0771724
- Chicago author-date
- 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): 13881–85. https://doi.org/10.1021/jp0771724.
- Chicago author-date (all authors)
- 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. doi:10.1021/jp0771724.
- 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.
- IEEE
- [1]Y. G. Galyametdinov et al., “Magnetic alignment study of rare-earth-containing liquid crystals,” JOURNAL OF PHYSICAL CHEMISTRY B, vol. 111, no. 50, pp. 13881–13885, 2007.
@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}},
keywords = {{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://doi.org/10.1021/jp0771724}},
volume = {{111}},
year = {{2007}},
}
- Altmetric
- View in Altmetric
- Web of Science
- Times cited: