An Optical Study to Estimate Orientational Order Parameter on Some Benzylideneaminophenylbenzoate Liquid Crystals

• Authors: C. Subhan , R. Jeevan Kumar , P. Panduranga , B. Jayashreeand , K. Fakruddin
• Languages of publication: EN

Abstracts

EN

The birefringence technique has been used for the evaluation of order parameter in the nematic phase along with the density measurements, which are needed for the calculation of molecular polarizabilities of the compounds. Birefringence and density studies have been carried out on the three liquid crystalline compounds viz.(1) (E)-4-((4-hexyloxy)benzylidene)amino)phenyl 4-butoxybenzoate(2) (E)-4-((4-hexyloxy)benzylidene)amino)phenyl 4-(decycloxy)benzoate and(3) (E)-4-((4-hexyloxy)benzylidene)amino)phenyl 4-(tridecycloxy)benzoate.Using birefringence and density data the molecular polarizabilities are evaluated by two different internal field models due to Vuks and Neugebauer. The mean molecular polarizability of the compounds is also evaluated by employing modified Lippincott δ-function model. The results reveal that both the theoretical and experimental values obtained are very near to each other.

Keywords

EN

42.79.Kr; 78.15.+e; 61.30.Gd

Discipline

• 61.30.Gd: Orientational order of liquid crystals; electric and magnetic field effects on order
• 78.15.+e: Optical properties of fluid materials, supercritical fluids and liquid crystals(for reactions in supercritical fluids, see 82.33.De)
• 42.79.Kr: Display devices, liquid-crystal devices(see also 85.60.Pg Display systems)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2016
• Volume: 129
• Issue: 3
• Pages: 284-288

Dates

published

2016-03

received

2014-1-024

(unknown)

2015-08-23

Contributors

author

C. Subhan

• Department of Physics, Sri Krishnadevaraya University, Anantapur, India

author

R. Jeevan Kumar

• Department of Physics, Sri Krishnadevaraya University, Anantapur, India

author

P. Panduranga

• Department of Physics, Sri Krishnadevaraya University, Anantapur, India

author

B. Jayashreeand

• Department of Physics, Maharani's Science College, Bangalore, India

author

K. Fakruddin

• Department of Physics, Ghousia College of Engineering, Ramanagaram, India

References

• [1] W.H. De Jeu, Physical Properties of Liquid Crystalline Materials, Gordon and Breach, New York 1980
• [2] W. Kuczynski, B. Zywuchki, J. Matecki, Mol. Cryst. Liq. Cryst. 381, 1 (2002), doi: 10.1080/713738745
• [3] S.K. Pal, V.A. Raghunathan, S. Kumar, Liq. Cryst. 34, 135 (2007), doi: 10.1080/02678290601061280
• [4] C.L. Toh, J. Xu, C. He, Liq. Cryst. 35, 241 (2008), doi: 10.1080/02678290701862355
• [5] I. Haller, H.A. Huggins, H.R. Lilienthal, T.R. McGuire, J. Phys. Chem. 77, 950 (1973), doi: 10.1021/j100626a020
• [6] D. Venkata Rao, P. Pardhasaradhi, V.G.K.M. Pisipati, P.V. Datta Prasad, Phase Transit. 88, 137 (2015), doi: 10.1080/01411594.2014.961154
• [7] P. Pardhasaradhi, P.V. Datta Prasad, D. Madhavi Latha, V.G.K.M. Pisipati, G. Padmaja Rani, Phase Transit. 85, 1031 (2012), doi: 10.1080/01411594.2012.671323
• [8] H.S. Subramhanyam, D. Krishnamurti, Mol. Cryst. Liq. Cryst. 22, 239 (1973), doi: 10.1080/15421407308083347
• [9] J. Lalitha Kumari, P.V. Datta Prasad, D. Madhavi Latha, V.G.K.M. Pisipati, Phase Transit. 85, 52 (2012), doi: 10.1080/01411594.2011.578826
• [10] K. Fakruddin, R. Jeevan Kumar, P.V. Datta Prasad, V.G.K.M. Pisipati, Mol. Cryst. Liq. Cryst. 511, 146 (2009), doi: 10.1080/15421400903053693
• [11] V.R. Murthy, S.V. Naidu, R.N.V. Ranga Reddy, Mol. Cryst. Liq. Cryst. 59, 27 (1980), doi: 10.1080/00268948008073496
• [12] P. Adamski, A. Dylik-Gromisc, Mol. Cryst. Liq. Cryst. 35, 171 (1976), doi: 10.1080/15421407608084319
• [13] I. Haller, H.A. Huggins, M.J. Freisner, Mol. Cryst. Liq. Cryst. 16, 53 (1972), doi: 10.1080/15421407208083579

Identifiers

DOI

10.12693/APhysPolA.129.284