Paper Titles in Periodical
International Letters of Chemistry, Physics and Astronomy
Volume 60

Subscribe

Subscribe to our Newsletter and get informed about new publication regulary and special discounts for subscribers!

ILCPA > Volume 60 > Study of Mesomorphism Changing on Terminal Side...
Study of Mesomorphism Changing on Terminal Side Chain with Different Thioalkyl Group
< Back to Volume

Study of Mesomorphism Changing on Terminal Side Chain with Different Thioalkyl Group

Full Text PDF

Abstract:

A novel mesomorphic series is RS-C6H4-COO-C6H4-CO-CH=CH-C6H4-OC18H37(n) (para) of chalconyl ester play double role thermotropic as well as lyotropically bioactive is synthesized and studied with a view to understand and establish the effect on mesomorphism when changing on left thioalkyl chain.the relation between mesomorphism and molecular structure on the basis of molecular rigidity and flex Novel series consists of thirteen homologues of which four homologues (C1 to C3) are non liquid crystal and the rest of the homologues (C5 to C18) are thermotropically enantiotropic nematic absences with smectic property. Thermometric transition temperatures and textures of nematogenic phase are determined by an optical polarizing microscopy equipped with a heating stage (POM).Textures of nematicphas schilieren and threaded type. Cr-N/I and N-I transition curves behaves in as manner with negligible abnormality at C18 homologue in phase diagram of a series.Analytical and spectral data conforms the molecular structure of homologues. Thermal stability for nematic is 123.2 °C whose degree of mesomorphism vary minimum from 4.0°C to a maximum of 24.0 °C, and hence novel series is of middle ordered melting type.

Info:

Periodical:
International Letters of Chemistry, Physics and Astronomy (Volume 60)
Pages:
142-151
DOI:
https://doi.org/10.18052/www.scipress.com/ILCPA.60.142
Citation:
R. Solanki and R.B. Patel, "Study of Mesomorphism Changing on Terminal Side Chain with Different Thioalkyl Group", International Letters of Chemistry, Physics and Astronomy, Vol. 60, pp. 142-151, 2015
Online since:
Sep 2015
Authors:
Ravindra Solanki, R.B. Patel
Keywords:
Liquid Crystal, Mesomorphism, Nematic, Smectic, Thermotropic
Export:
RIS, BibTeX, Text
Distribution:
Open Access

Creative Commons License
This work is licensed under a
Creative Commons Attribution 4.0 International License

References:

F. Reinitzer, Montsh 9, 421(1888).

Johnson, J.F.; Porter, R.S. Liquid Crystals and Ordered Fluids; Plenum Press: New York, NY, USA, 1970; p.477.

Smith, G. Advanced in Liquid Crystals; Academic Press: New York, NY, USA, 1975; p.20.

Gennes, P. The Physis of Liquid Crystal; Clarendon Press: Oxford, UK, 1975; p.85.

Gray, G. Thermotropic Liquid Crystals; Wiley: New York, NY, USA, 1987; p.113.

Chandrasekhar, S. Liquids Crystals; Cambridge University Press: London, UK, 1977; p.51.

S. Narmura. Advance LCD technologies, Display 22(1)(2001)PP. 1.

W.S. Kim S.J. Elston and F.P. Raynes, Diplays 29 (2008). PP. 458-463.

E. Hertz, B. lavorel and O. Faucher, Optical imagine by molecular gas, Nature Photon; 5(2011) PP. 783.

Imaran Tadwee, Dr. sahanashahi, Vivek Ramtake, Iftequr Syed, Liquid Crystal Pharmaceutical Application: A review, IJRAS, ISSN2277-36. Vol. 1 Issue2 (2012), 06-11.

Hird M. Toynel, K.J. Gray, G.W. Day S. E, and Mc. Donnel D. G(1993) Liq. Cryst., 15, 123.

Colling. P.J., and Hird. M., Introduction to Liquid Crystal Chemistry and Physics, Taylor and Francis Ltd, U.K., (1998).

Marcos. M, OmenatA, SerronoJ. L and Ezcurra A. (1992)Adv. Meter, 4, 285.

Hird. M. Toyne, K.J. & Grey G.W. (1993)Liq. cryst. 14, 741.

Dave J. S and Vora R. A(1970)In J.F. Johnson and R.S. Porter, (Eds), (Liquid Crystal and Ordered fluids, Plenum Press: New York, p.477.

Singh, A.K.; Kumari, S.; Kumar, K.R.; Sridhar, B.; Rao, T.R. Synthesis and spectral studies of the mesogenic Schiff-base, N, N-di-(4'-pentyloxybenzoate)salicylidene-1, 8-diamino-3, 6dioxactane and crystal structure of the Zn (II) complexs. Polyhedron 2008, 27, 181-186.

Show More Hide