TY - JOUR

T1 - NMR investigation of a thermotropic liquid crystal showing isotropic-isotropic'-(columnar)-cubic phase transitions

AU - Cifelli, Mario

AU - Domenici, Valentina

AU - Gorecka, Ewa

AU - Wojcik, Micham

AU - Dvinskikh, Sergey V.

PY - 2017/5/24

Y1 - 2017/5/24

N2 - In this work, we report a first detailed study of the mesophasic behaviour of the calamitic liquid crystal, a (4,4′-bis(4″-carboxybelzyloxy)biphenyl derivate, labelled 9/2 RS/RS, showing an isotropic-isotropic-(columnar)-cubic phase behaviour on cooling. 1H NMR diffusometry allowed to distinguish between the two isotropic phases in terms of diffusion characterized by different Arrhenius activation energy, while 13C NMR static measurements and 2H NMR investigations were of help in understanding the orientational ordering properties of the metastable columnar phase and confirmed the isotropic state of the sample in the cubic phase.

AB - In this work, we report a first detailed study of the mesophasic behaviour of the calamitic liquid crystal, a (4,4′-bis(4″-carboxybelzyloxy)biphenyl derivate, labelled 9/2 RS/RS, showing an isotropic-isotropic-(columnar)-cubic phase behaviour on cooling. 1H NMR diffusometry allowed to distinguish between the two isotropic phases in terms of diffusion characterized by different Arrhenius activation energy, while 13C NMR static measurements and 2H NMR investigations were of help in understanding the orientational ordering properties of the metastable columnar phase and confirmed the isotropic state of the sample in the cubic phase.

UR - http://www.scopus.com/inward/record.url?scp=85028753264&partnerID=8YFLogxK

U2 - 10.1080/15421406.2017.1303595

DO - 10.1080/15421406.2017.1303595

M3 - Article

AN - SCOPUS:85028753264

VL - 649

SP - 20

EP - 30

JO - Molecular Crystals and Liquid Crystals

JF - Molecular Crystals and Liquid Crystals

SN - 1542-1406

IS - 1

ER -