Molecular Vibration Approach to Polarizabilities of Methyl Cinnamate Liquid Crystal Compounds

• Authors: Y.N. Murthy , V.R. Murthy , R.N.V. Ranga Reddy
• Languages of publication: EN

Abstracts

EN

A new theoretical method of evaluating polarizabilities of liquid crystals is presented and applied to the liquid crystalline compounds, namely n-alkyl-p-(4-ethoxy benzylidene amino)-α-methyl cinnamates, which exhibit smectic A and nematic phases. In the present method, vibrational frequencies are used to evaluate force constants, mean amplitude of vibration and hence bond polarizabilities. From mean polarizabilities, polarizability anisotropies and mean diamagnetic susceptibilities are also estimated. A close agreement is found between the values estimated from the present molecular vibration method and the reported data, which confirms the applicability of this method to the liquid crystals exhibiting smectic A and nematic phases. In addition, the variation of the order parameter with temperature is also studied.

Keywords

EN

61.30.-v

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1997
• Volume: 91
• Issue: 6
• Pages: 1069-1079

Dates

published

1997-06

received

1996-07-01

(unknown)

1996-12-16

(unknown)

1997-03-12

Contributors

author

Y.N. Murthy

• Department of Physics, SSBN College, Anantapur-515 001 (A.P.), India

author

V.R. Murthy

• Department of Physics, S.K. University, Anantapur-515 003 (A.P.), India

author

R.N.V. Ranga Reddy

• Department of Physics, S.K. University, Anantapur-515 003 (A.P.), India