Mesophase stability of new Schiff base ester liquid crystals with different polar substituents

References

• Reyes CG, Sharma A, Lagerwall JP. Non-electronic gas sensors from electrospun mats of liquid crystal core fibres for detecting volatile organic compounds at room temperature. Liq Cryst. 2016;43(13–15):1986–2001.
   Web of Science ®Google Scholar
• Setia S, Sidiq S, De J, et al. Applications of liquid crystals in biosensing and organic light-emitting devices: future aspects. Liq Cryst. 2016;43(13–15):2009–2050.
   Web of Science ®Google Scholar
• Gupta R, Manjuladevi V, Karthik C, et al. Thin films of discotic liquid crystals and their applications. Liq Cryst. 2016;43(13–15):2079–2091.
   Web of Science ®Google Scholar
• Goodby JW. Free volume, molecular grains, self-organisation, and anisotropic entropy: machining materials. Liq Cryst. 2017;44(12–13):1755–1763.
   Web of Science ®Google Scholar
• Singh S, Dunmur DA. Liquid crystals: fundamentals. London: World Scientific; 2002.
   Google Scholar
• Kelker H, Scheurle B. A liquid‐crystalline (nematic) phase with a particularly low solidification point. Angew Chem Int Ed. 1969;8(11):884–885.
   Web of Science ®Google Scholar
• Kelker H, Scheurle B. Eine flüssig‐kristalline (nematische) Phase mit besonders niedrigem Erstarrungspunkt. Angewandte Chemie. 1969;81(22):903–904.
   Google Scholar
• Sastry PS, Pardhasaradhi P, Srinivasu C, et al. Synthesis, characterisation and phase transition studies in N-(−4-ethyloxybenzylydene)-4ʹ- alkoxyanilines. Liq Cryst. 2016;43(5):632–638.
   Web of Science ®Google Scholar
• Elgueta EY, Parra ML, Barbera J, et al. New polycatenar Schiff bases derived from 1,3,4-thiadiazole: synthesis, mesomorphism and luminescence behaviour. Liq Cryst. 2016;43(11):1649–1658.
   Web of Science ®Google Scholar
• Henderson PA, Imrie CT. Methylene-linked liquid crystal dimers and the twist-bend nematic phase. Liq Cryst. 2011;38(11–12):1407–1414.
   Web of Science ®Google Scholar
• Nandi R, Singh HK, Singh SK, et al. Investigation of liquid crystalline property of a new calamitic liquid crystalline system methyl 4-(4 ‘-(4 “‘-(decyloxy)benzyloxy) benzylideneamino)benzoate. Liq Cryst. 2017;44(7):1185–1193.
   Web of Science ®Google Scholar
• Mohiuddin G, Begum N, Rao NVS, et al. Observation of disordered mesomorphism in three-ring-based highly polar bent-core molecules: design, synthesis and characterisation. Liq Cryst. 2017;44(14–15):2247–2258.
   Web of Science ®Google Scholar
• Yeap G-Y, Hng T-C, Yeap S-Y, et al. Why do non-symmetric dimers intercalate? The synthesis and characterisation of the -(4-benzylidene-substituted- aniline-4ʹ-oxy)–(2- methylbutyl-4ʹ-(4ʹ’-phen yl)benzoateoxy)alkanes. Liq Cryst. 2009;36(12):1431–1441.
   Web of Science ®Google Scholar
• Yeap G-Y, Osman F, Imrie CT. Non-symmetric dimers: effects of varying the mesogenic linking unit and terminal substituent. Liq Cryst. 2015;42(4):543–554.
   Web of Science ®Google Scholar
• Gray GW. Thermotropic liquid crystals. New York: John Wiley & Sons Inc; 1987.
   Google Scholar
• Naoum MM, Metwally NH, Abd Eltawab MM, et al. Polarity and steric effect of the lateral substituent on the mesophase behaviour of some newly prepared liquid crystals. Liq Cryst. 2015;42(10):1351–1369.
   Web of Science ®Google Scholar
• Gray GW. Molecular structure and the properties of liquid crystals. London: Academic press; 1962. p. 132, 147.
   Google Scholar
• Imrie C, Taylor L. The preparation and properties of low molar mass liquid crystals possessing lateral alkyl chains. Liq Cryst. 1989;6(1):1–10.
   Web of Science ®Google Scholar
• Henderson PA, Seddon JM, Imrie CT. Methylene- and ether-linked liquid crystal dimers II. Effects of mesogenic linking unit and terminal chain length. Liq Cryst. 2005;32(11–12):1499–1513.
   Web of Science ®Google Scholar
• Yeap G-Y, Lee H-C, Mahmood WAK, et al. Synthesis, thermal and optical behaviour of non-symmetric liquid crystal dimers alpha-(4-benzylidene- substituted-aniline-4 ‘-oxy)-omega- pentyl-4-(4 ‘-phenyl)benzoateoxy hexane. Phase Transitions. 2011;84(1):29–37.
   Web of Science ®Google Scholar
• Yeap GY, Osman F, Imrie CT. Non-symmetric dimers: effects of varying the mesogenic linking unit and terminal substituent. Liq Cryst. 2015;42(4):543–554.
   Web of Science ®Google Scholar
• Attard GS, Date RW, Imrie CT, et al. Nonsymmetrical dimeric liquid-crystals - the preparation and properties of the alpha-(4-cyanobiphenyl-4ʹ- yloxy)-omega-(4-n- alkylanilinebenzylidene-4ʹ-o xy)alkanes. Liq Cryst. 1994;16(4):529–581.
   Web of Science ®Google Scholar
• Imrie CT. Non‐symmetric liquid crystal dimers: how to make molecules intercalate. Liq Cryst. 2006;33(11–12):1449–1485.
   Web of Science ®Google Scholar
• Nessim RI, Naoum MM, Mohamed SZ, et al. Effect of molecular structure on the phase behaviour of some liquid crystalline compounds and their mixtures XIII. 4-(4-substituted phenylazo) phenyl 4-alkoxybenzoates. Liq Cryst. 2004;31(5):649–654.
   Web of Science ®Google Scholar
• van der Veen J. The influence of terminal substituents upon the nematic-isotropic transition temperature. Le Journal De Physique Colloques. 1975;36(C1):C1-375-C1-7.
   Google Scholar
• Naoum MM, Nessim RI, Saad GR, et al. Effect of molecular structure on the phase behaviour of some liquid crystalline compounds and their binary mixtures IV. Dependence of Tc on the anisotropy of the aryl-X of polarizability bond. Liq Cryst. 1998;25(1):73–83.
   Web of Science ®Google Scholar
• Karim MR, Sheikh MRK, Yahya R, et al. The effect of terminal substituents on crystal structure, mesophase behaviour and optical property of azo-ester linked materials. Liq Cryst. 2016;43(12):1862–1874.
   Web of Science ®Google Scholar
• Karim MR, Sheikh MRK, Yahya R, et al. Synthesis of polymerizable liquid crystalline monomers and their side chain liquid crystalline polymers bearing azo-ester linked benzothiazole mesogen. Colloid Polym Sci. 2015;293(7):1923–1935.
   Web of Science ®Google Scholar