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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2018 Volume 107, Issue 7, Pages 455–458 (Mi jetpl5541)

This article is cited in 3 papers

CONDENSED MATTER

Critical effect of the length of counterions in mesogenic lanthanide complexes on the electro-optical properties of their melts

S. G. Polushina, I. E. Lezovaa, G. E. Polushinaa, V. B. Rogozhina, E. I. Ryumtseva, K. A. Romanovab, Yu. G. Galyametdinovb

a St. Petersburg State University, St. Petersburg, Russia
b Kazan National Research Technological University, Kazan, Russia

Abstract: Isotropic melts of nine metallomesogenic complexes with a smectic-A phase have been studied by the electric birefringence method. Complexes include Dy, Tb, Gd, and Er rare-earth ions, Schiff bases as ligands, and alkyl sulfate or nitric-acid counterions. It has been shown for the first time that both the magnitude and the sign of the electro-optical effect in the isotropic phase for the studied substances are determined by the length of counterions. This means that the dielectric anisotropy of smectic lanthanide complexes can vary widely depending on counterions: it can be positive, negative, or close to zero.

Received: 15.02.2018
Revised: 26.02.2018

DOI: 10.7868/S0370274X18070093


 English version:
Journal of Experimental and Theoretical Physics Letters, 2018, 107:7, 431–434

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