The anisotropic properties of a terbium-based liquid crystal complex
https://doi.org/10.17586/2220-8054-2016-7-6-911-918
Abstract
The dielectric properties of a paramagnetic terbium-containing liquid crystal have been studied. The magnitude and the sign of the dielectric of the liquid crystalline complex have been determined. The relaxation processes (modes) characterizing the dispersion of the principal values of the sample’s dielectric permittivity has been studied. The relaxation times, activation energy and the dipole moment of the complex could be evaluated.
About the Authors
L. A. DobrunRussian Federation
Universitetskaya nab. 7/9, Saint Petersburg, 199034
A. S. Sakhatskii
Russian Federation
Universitetskaya nab. 7/9, Saint Petersburg, 199034
A. P. Kovshik
Russian Federation
Universitetskaya nab. 7/9, Saint Petersburg, 199034
E. I. Ryumtsev
Russian Federation
Universitetskaya nab. 7/9, Saint Petersburg, 199034
W. Haase
Germany
Alarich-Weiss-Str 4, Darmstadt, D 64284
Yu. G. Galyametdinov
Russian Federation
Karl Marks street 68, Kazan, 420015
A. S. Krupin
Russian Federation
Karl Marks street 68, Kazan, 420015
A. A. Knyazev
Russian Federation
Karl Marks street 68, Kazan, 420015
References
1. Feng J., Zhang H. Hybrid materials based on lanthanide organic complexes: a review. Chemical Society Reviews, 2013, 42, P. 387–410.
2. Kalyani N.T, Dhoble S.J. Novel materials for fabrication and encapsulation of OLEDs. Renewable and Sustainable Energy Reviews, 2015, 44, P. 319–347.
3. Xu H., Sun Q., An Z., Wei Y., Liu X. Electroluminescence from europium (III) complexes. Coordination Chemistry Reviews, 2015, 293, P. 228–249.
4. Knyazev A.A., Molostova E.Yu., Krupin A.S., Heinrich B., Donnio B., Haase W., Galyametdinov Yu.G. Mesomorphic behaviour and luminescent properties of mesogenic-diketonate lanthanide adducts with 5,50-di(heptadecyl)-2,20-bipyridine. Liquid Crystals, 2013, 40, P. 857–863.
5. Binnemans K. Lanthanidomesogens. Handbook on the Physics and Chemistry of Rare Earths, 2013, 43, P. 1–158
6. Binnemans K. Luminescence of metallomesogens in the liquid crystal state Journal of Materials Chemistry, 2009, 19, P. 448–453.
7. Goossens K., Bruce D.W., Van Deun R., Binnemans K., Cardinaels Th. Nematogenic tetracatenar lanthanidomesogens. Dalton Transactions, 2012, 41, P. 13271–13273.
8. Terazzi E., Suarez S., Torelli S., Nozary H., Imbert D., Mamula O., Rivera J.-P., Guillet E., Benech J.-M., Bernardinelli G., Scopelliti R., ´Donnio B., Guillon D., Bunzli J.-C., Piguet C. Introducing Bulky Functional Lanthanide Cores into Thermotropic Metallomesogens: A Bottom-Up Approach. Advanced Functional Materials, 2006, 16, P. 157–168.
9. Binnemans K., Lodewyckx K., Parac-Vogt T.N., R.Van Deun, Goderis B., Tinant B., K. Van Hecke, L. Van Meervelt. Adducts of Schiff Bases with Tris (β-diketonato) lanthanide(III) Complexes: Structure and Liquid-Crystalline Behaviour. European Journal of Inorganic Chemistry, 2003, P. 3028–3033.
10. Knyazev A.A., Krupin A.S., Molostova E.Yu, Romanova K.A., Galyametdinov Yu.G. Influence of Structural Anisotropy on Mesogenity of Eu (III) Adducts and Optical Properties of Vitrified Films Formed on their Base. Inorganic Chemistry, 2015, 54, P. 8987–8993.
11. Galyametdinov Yu.G., Knyazev A.A., Dzhabarov V.I., Cardinaels T., Driesen K.S., Gorller-Walrand C., Binnemans K. Polarized lumines-cence from aligned samples of nematogenic lanthanide complexes. Advanced materials, 2008, 20, P. 252–257.
12. Dzhabarov V.I., Knyazev A.A., Strelkov M.V., Molostova E.Yu., Schustov V.A., Haase W., Galyametdinov Yu.G. Tris (β-diketonates) lanthanum nematic adducts. Liquid Crystals, 2010, 37, P. 285–291.
13. Dzhabarov V.I., Knyazev A.A., Nikolaev V.F., Galyametdinov Yu.G. Anisotropy of the magnetic susceptibility of mesogeneous lanthanide complexes. Russian Journal of Physical Chemistry A, 2011, 85, P. 1450–1453.
14. Mironov V.S., Galyanetdinov Yu.G., Ceulemans A., Gorller-Walrand C., Binnemans K. Influence of crystal-field perturbations on the room-temperature magnetic anisotropy of lanthanide complexes, Chem. Phys. Lett., 2001, 345, P. 132-140.
15. Dobrun L.A., Sakhatskii A.S., Kovshik A.P., Ryumtsev E.I., Knyazev A.A., Galyametdinov Yu.G. Dielectric Properties of an YtterbiumBased Nematic Liquid-Crystal Complex. JETP Letters, 2014, 99, P. 133–135.
16. Dobrun L.A., Sakhatskii A.S., Kovshik A.P., Ryumtsev E.I., Kolomiets I.P., Knyazev A.A., Galyametdinov Yu.G. Dielectric and Magnetic Anisotropy of a Nematic Ytterbium Complex. JETP, 2015, 147, P. 1064–1067.
17. Galyametdinov Y.G., Haase W., Goderis B., Moors D., Driesen K., R. van Deun, Binnemans K. Magnetic alignment study of rare-earthcontaining liquid crystals. Journal of Physical Chemistry B, 2007, 111, P. 13881–13885.
18. Haase W., Wrobel S. Relaxation phenomena: liquid crystals, magnetic systems, polymers, high-Tc superconductors, metallic glasses. ´Springer Science & Business Media, 2013.
19. Kovshik A.P., Krainyukov E.S., Kovshik S.A., Knyazev A.A., Galyametdinov Yu.G., Ryumtsev E.I. Optical Anisotropy of Liquid Crystal Lanthanide Complexes. Optics and Spectroscopy, 2014, 116, P. 56–61.
20. Nordio P.L., Rigatti G., Serge U. Dielectric relaxation theory in nematic liquids. Molecular physics, 1973, 25, P. 129–136.
21. Tsvetkov V.N., Ryumtsev E.I., Polushin S.G., Kovshik A.P. Molecular mechanisms of polarization and its relaxation in nematic liquidcrystals. Acta physica polonica A, 1979, 56, P. 871–878.
22. Clark M.G. Macroscopic Properties of Liquid Crystals. Molecular Crystals and Liquid Crystals, 1985, 127, P. 141.
23. Maier W., Meier G. Eine einfache Theorie der dielektrischen Eigenschaften homogen orientierter kristallinfl¨ussiger Phasen des nematischen Typs. Z. Naturforschg, 1961, 16a, P. 262267.
24. Nguyen X.P., Urban S., Wrobel S., Kresse H. Acta physica polonica, 1978, A54(5), P. 617–623.
Review
For citations:
Dobrun L.A., Sakhatskii A.S., Kovshik A.P., Ryumtsev E.I., Haase W., Galyametdinov Yu.G., Krupin A.S., Knyazev A.A. The anisotropic properties of a terbium-based liquid crystal complex. Nanosystems: Physics, Chemistry, Mathematics. 2016;7(6):911-918. https://doi.org/10.17586/2220-8054-2016-7-6-911-918