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International Letters of Chemistry, Physics and Astronomy
Volume 59

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Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism

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Abstract:

A novel homologous series RO-C6H4-CH=CH-COO-C6H4-CO-CH=CH-C6H4-OC16H33 (n) para of chalconyl ester derivatives have been synthesized and studied with a view to understand and establish the effect of molecular structure on thermotropic liquid crystalline state of the substances and to provide novel liquid crystal (LC) materials to the researchers working in an unique multidisciplinary LC state of the substances. A novel chalconyl ester series consists of thirteen ( C1 to C18) homologues. C5 to C18 homologues are enantiotropically nematogenic without exhibition of smectogenic property, while the rest of the C1 to C4 homologues are nonliquid crystals (NLC). Transition temperatures and textures were determined by polarizing optical microscopy (POM) equipped with a heating stage. Textures of a nematic phase are threaded or schlieren. Cr-I/N and N-I transition curves of a phase diagram behaved in normal manner except negligible abnormality at C14 homologue. Odd-even effect is exhibited by N-I transition curve. Analytical and Spectral data supported molecular structures of the homologues. Thermal stability for nematic is 97.33°C and the degree of mesomorphism vary maximum 24.0°C at C5 homologue to minimum 11.0°C at C10 homologue respectively. Latent transition temperatures (LTT) are determined for nonmesomorphic homologues C4 (90°C) and C3 (114°C) homologues by extrapolation method of transition curve. LC properties of a novel series are (thermometric) compared with structurally similar series.

Info:

Periodical:
International Letters of Chemistry, Physics and Astronomy (Volume 59)
Pages:
115-123
DOI:
10.18052/www.scipress.com/ILCPA.59.115
Citation:
V. S. Sharma and R.B. Patel, "Molecular Flexibility of Longer n-Alkoxy Tail Group Operated Mesomorphism", International Letters of Chemistry, Physics and Astronomy, Vol. 59, pp. 115-123, 2015
Online since:
Sep 2015
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References:

[1] F. Reinitzer, Monatsh 9, 421, (1888).

[2] W.S. Kim, S.J. Elston , and F.P. Raynes , Display29 (2008) PP. 458-463.

[3] E. Hertz, B. Lavorel and O. Faucher , Optical imagine by molecular gas, Nature photon; 5 (2011) PP. 783.

[4] ImranTadwee, Dr. Sahanashahi, vivekRamteke, Iftequarsyed, Liquid crystal pharmaceutical Application: A review , IJPRAS. ISSN2277-2236 vol. 1, Issue2(2012), 06-11.

[5] G.W. Gray and P.A. Winster (Eds) Liquid Crystal and plastic crystals, chapter-6. 2 , The role of liquid crystal in life processes by G.T. Stewart, Vol-1, PP. 308-326.

[6] Upendra K Jain , Rich K Bhatia , Akkinepally R. Rao, Ranjit singh , Saxsena Ajit K and Seha lrun Design and Development of Halogenated Chalcone derivatives as potential anticancer Agents , Tropical Journal of pharmaceutical Research , January 2014: 13(1), 73-80.

DOI: 10.4314/tjpr.v13i1.11

[7] Prajkata P. Gaikwad , Desai Maya T. Liquid crystalline phase and its Pharma application, International journal of Pharma Research and Review , Dec. 2013; 2 (12) ; 40-52.

[8] C.A. Calliste, J.C. Le Bail, P. Trouilas, C. Poug, A.J. Chulia, L.J. Duroux, Anticancer, Res. 2001, 21 , 3949-3956.

[9] Gray G.W. (1974) ln; Gray G.W. and P.A. Winsor P.A. (eds) liquid crystal and plastic crystals, Chapter-4 , Volume-1, PP-103-153.

[10] Gray G.W., Molecular Structure and properties of liquid crystals, Academic press, Landon, (1962).

[11] Gray G.W. and Jones B., Mesomorphism and chemical constitution part-3, The effect of halogen substitution on the 4-Alkoxy benzoic acids, Journal of chemical society (1954) PP, 2556-2562.

DOI: 10.1039/jr9540002556

[12] C.T. lmrie , Liq. Crystal dimers. struct. Bond 95 (1999) PP. 149-192.

[13] Dermus D., 100 years of liquid crystals chemistry, mol. Cryst. 165 (1998) PP. 45-84.

[14] Dermus D., Plenary lectures 100 years of liquid crystals chemistry, Thermotropic liquid crystals with conventional and unconventional molecular structures, Liq. Cryst, 5 (1998). PP. 75-100.

DOI: 10.1080/02678298908026353

[15] lmrie C. T and Luckhrust G. R, " Liquid Dimers and Oligomers in handbook of Liquid Crystal, law molecular liquid crystals; Vol. 2B, Demus D. , Goodby J.W., Graw G.W. , Spiess H. and Vill V. eds, Willey-VCH weinhe 1998, PP-801-833.

DOI: 10.1002/9783527619276

[16] Doshi et al (i) Suthar D.M. and Doshi A.V., Mol. Cryst. Liq. Cryst. Vol. 575, PP. 76-83. (ii) Chauhan H.N. and Doshi A.V., Mol. Cryst. Liq. Cryst. Vol. 570, PP. 92-100 (2013).

[17] Patel B.H. and Doshi A.V. Synthesis and liquid Crystal Properties of a Nvel Homologous Series 4-(4'-n-Alkoxy benzoyloxy) Benzyl Benzoate, Mol. Cryst. Liq. Cryst., Vol-605, PP. 61-69 (2015).

[18] Patel B.H. and Doshi A.V. Effect of a Central Group on Mesomorphism, Mol. Cryst. Liq. Cryst. Vol-607, PP. 114-122 (2015).

[19] Suthar D.M., Doshi A.A. and Doshi A.V., Synthesis of liquid crystalline state and evaluation of its properties through a novel Homologous series, , Mole. Cryst. Liq. Cryst. Vol-582, PP. 79-87, (2013).

DOI: 10.1080/15421406.2013.803892

[20] Suthar D.M., Doshi A.A. and Doshi A.V. Synthesis and evaluation of novel Liquid crystalline Homologous series α-4-(4/-n-alkoxy Cinnamoyloxy) benzoyl-β-3", 4"- Dimethoxy phenyl Ethylenes,. Mol. Cryst. Liq. Cryst. Vol. 527, PP. 51-58 (2013).

DOI: 10.1080/15421406.2013.785812

[21] P.A. Henderson, O. Niemeyer, and C.T. Imrie, Methylene-linked liquid crystal dimers, Liq. Cryst. 28 , PP. 463-472(2001).

DOI: 10.1080/02678290010007558

[22] Hird. M, Toyne. K. J, Gray G.W. , Day S.E. (1993) Liq. Cryst. 14, PP. 741.

[23] P.J. Collings and M. Hird (1997) , Introduction of Liquid crystals chemistry and Physics, Taylor and Francis Ltd. U.K. (1998).

[24] Macros . M, Omenat. A, , Serrano. J. L and Ezcurra. A(1992) , Adv. Matter, 4, 285.

[25] Hird. M, Toyne. K. J, Gray G.W. , Day S.E. (1993) Liq. Cryst. 14, PP. 741.

[26] Patel R.B. and Doshi A.V. , Der Pharma Chemica, 2011, 3, (2), PP. 110-117.

[27] Dave J. S and Vora R. A (1970). In: J. F . Johnson and R.S. Porter, (eds), ( Liquid Crystals and ordered fluids, Plenum Press: New York, P. 447.

[28] Uhood J.A., international Journal of Molecular Science., vol. 12; PP. 3182-3190 (2011).

[29] Bhoya U.C. , Vyas N.N. and Doshi A.V. , Mol. Cryst. Liq. Cryst. , Vol. 552. PP. 104- 110. (2012).

[30] Doshi A.V., Bhoya U.C., Travadi J.J., Mol. Cryst. Liq. Cryst., Vol. 552. PP. 10-15, (2012).

[31] Lohar J. M and Doshi A.V., Studies on mixed mesomorphism : Determination of latent transition temperature (LTT) by extrapolation, proceeding of Indian Acad. Of Science-Bangalore, Vol-105, N0-3, June 1993, PP. 209-214.

[32] Ganatara K.J. and Doshi A.V., Study of binary systems inducing mesophase and determination of latent Transition Temperature,. Journal of Indian Chem. Soc., Vol. 77, July 2000, PP. 322-325.

[33] Vinay S. Sharma, Ravindra B. Solanki and R.B. Patel , Manuscript of the research paper entitled, Molecular Structure and Mesomorphism: Effect of Tail/Lateral Group, submitted for publication in Mol. Cryst. Liq. Cryst. Journal with its reference no. LCMH No. 326 date 28th April (2015).

[34] Chauhan H.N., Doshi A.V., Der Pharma Chemica, 4(3): PP. 977-983, (2012).

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