H-2-NMR in three different magnetic fields and small angle X-ray scattering (SAXS) are employed to investigate the orientational order, molecular organisation and phase transitions of the chiral smectic liquid crystal (-)-(S)-[4-(2-methylbutyloxycarbonyl)phenyl] 4-n-heptyl-biphenyl-carboxylate (MBHB) suitably deuterated for H-2-NMR measurements. Unwinding of the ferroelectric chiral helix by high magnetic fields is observed and discussed. Tilt angle values are obtained with the two different techniques and compared. The results show the importance of molecular conformation for the structural properties of this mesogen.
2H-NMR and SAXS of a ferroelectric liquid crystal: unwinding of a ferroelectric chiral helix by high magnetic fields
CATALANO, DONATA INES MARIA;DOMENICI, VALENTINA;VERACINI, CARLO ALBERTO
2001-01-01
Abstract
H-2-NMR in three different magnetic fields and small angle X-ray scattering (SAXS) are employed to investigate the orientational order, molecular organisation and phase transitions of the chiral smectic liquid crystal (-)-(S)-[4-(2-methylbutyloxycarbonyl)phenyl] 4-n-heptyl-biphenyl-carboxylate (MBHB) suitably deuterated for H-2-NMR measurements. Unwinding of the ferroelectric chiral helix by high magnetic fields is observed and discussed. Tilt angle values are obtained with the two different techniques and compared. The results show the importance of molecular conformation for the structural properties of this mesogen.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
