Self-assembly of biaxial ordering and molecular tilt angle of chiral smectic liquid crystals in homeotropically aligned cells investigated using infrared spectroscopy

Korlacki, R. and Fukuda, A. and Vij, J. K. and Kocot, A. and Görtz, V. and Hird, M. and Goodby, J. W. (2005) Self-assembly of biaxial ordering and molecular tilt angle of chiral smectic liquid crystals in homeotropically aligned cells investigated using infrared spectroscopy. Physical Review E, 72 (4). ISSN 1539-3755

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Abstract

Temperature dependences of the infrared absorbance have been measured for the four chiral liquid crystal samples in the homeotropic cell configuration. It is shown that the values of the orientational order parameter obtained using this method exhibit a remarkable similarity to the x-ray diffraction results of the smectic layer spacing and lead to accurate values of the molecular tilt angle. This has important consequences for the existing interpretation of the x-ray data. The proposed method, in many cases, may be considered as a valuable alternative to the x-ray diffraction, giving additional, important information about the orientations and the ordering of the molecular fragments. It is found that if the experimentally obtained order parameter is low, then the molecular biaxiality is exceptionally large. The average phenyl ring plane is found to lie close to the molecular tilt plane.

Item Type:
Journal Article
Journal or Publication Title:
Physical Review E
Additional Information:
© 2005 The American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3104
Subjects:
ID Code:
65911
Deposited By:
Deposited On:
07 Aug 2013 10:30
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Feb 2020 02:41