Issue 39, 2015

Lyotropic La-containing lamellar liquid crystals: phase behaviour, thermal and structural properties

Abstract

This paper provides the results of POM, DSC and XRPD methods characterizing the liquid crystalline behaviour, thermal properties and structural parameters of lyotropic systems based on a nonionic surfactant and lanthanum nitrate (La3+). The systems based on tetraethylene glycol monododecyl ether (C12EO4) and lanthanum nitrate have been demonstrated to form a lamellar phase. The concentration and temperature ranges of the existence of mesophases as well as thermodynamic parameters of phase transitions have been estimated. The structural parameters of the lamellar phase of the C12EO4/La3+/water systems have been determined using X-ray diffraction. The model of molecular packing in lamellar lanthanide-containing lyotropic mesophases was proposed for the observed patterns of structural parameters obtained at various water contents. NMR 1H with a pulsed magnetic field gradient has been used to characterize molecular motions in the C12EO4/La3+/H2O systems with different water contents.

Graphical abstract: Lyotropic La-containing lamellar liquid crystals: phase behaviour, thermal and structural properties

Supplementary files

Article information

Article type
Paper
Submitted
03 Jun 2015
Accepted
06 Jul 2015
First published
28 Aug 2015

Soft Matter, 2015,11, 7809-7816

Lyotropic La-containing lamellar liquid crystals: phase behaviour, thermal and structural properties

N. M. Selivanova, A. B. Konov, K. A. Romanova, A. T. Gubaidullin and Yu. G. Galyametdinov, Soft Matter, 2015, 11, 7809 DOI: 10.1039/C5SM01371B

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