Low-temperature nematic phase in asymmetrical 1,3,4-oxadiazole bent-core liquid crystals possessing lateral methoxy group

References

• Niori T, Sekine T, Watanabe J, et al. Distinct ferroelectric smectic liquid crystals consisting of banana shaped achiral molecules. J Mater Chem. 1996;6:1231–1233.
   Web of Science ®Google Scholar
• Link DR, Natale G, Shao R, et al. Spontaneous formation of macroscopic chiral domains in a fluid smectic phase of achiral molecules. Science. 1997;278:1924–1927.
   PubMed Web of Science ®Google Scholar
• Pelzl G, Diele S, Weissflog W. Banana-shaped compounds-A new field of liquid crystals. Adv Mater. 1999;11:707–724.
   Web of Science ®Google Scholar
• Reddy RA, Tschierske C. Bent-core liquid crystals: polar order, super structural chirality and spontaneous desymmetrisation in soft matter systems. J Mater Chem. 2006;16:907–961.
   Web of Science ®Google Scholar
• Ros MB, Serrano JL, de la Fuente MR, et al. Banana-shaped liquid crystals: a new field to explore. J Mater Chem. 2005;15:5093–5098.
   Web of Science ®Google Scholar
• Takezoe H, Takanishi Y. Bent-core liquid crystals: their mysterious and attractive world. Jpn J Appl Phys. 2006;45:597–625.
   Web of Science ®Google Scholar
• Eremin A, Jákli A. Polar bent-shape liquid crystals - from molecular bend to layer splay and chirality. Soft Matter. 2013;9:615–637.
   Web of Science ®Google Scholar
• Glebowska A, Vita F, Francescangeli O, et al. Molecular engineering room-temperature bent-core nematics. Liq Cryst. 2015;42:829–839.
   Web of Science ®Google Scholar
• Vita F. Search for nematic biaxiality in bent-core mesogens: an X-ray diffraction perspective. Liq Cryst. 2016;43:2254–2276.
   Web of Science ®Google Scholar
• Alaasar M. Azobenzene-containing bent-core liquid crystals: an overview. Liq Cryst. 2016;43:2208–2243.
   Web of Science ®Google Scholar
• Schadt M. Nematic liquid crystals and twisted-nematic LCDs. Liq Cryst. 2015;42:646.
   Web of Science ®Google Scholar
• Raynes EP, Sage IC. Chemicals to calculators: the early exploitation of cyanobiphenyl liquid crystals. Liq Cryst. 2015;42:722–731.
   Web of Science ®Google Scholar
• Vita F, Tauscher T, Speetjens F, et al. Evidence of biaxial order in the cybotactic nematic phase of bent-core mesogens. Chem Mater. 2014;26:4671–4674.
   Web of Science ®Google Scholar
• Harden J, Mbanga B, Éber N, et al. Giant flexoelectricity of bent-core nematic liquid crystals. Phys Rev Lett. 2006;97:157802.
   PubMed Web of Science ®Google Scholar
• Le K, Araoka V, Fodor-Csorba KF, et al. Flexoelectric effect in a bent-core mesogen. Liq Cryst. 2009;36:1119–1124.
   Web of Science ®Google Scholar
• Wiant DB, Gleeson JT, Éber N, et al. Nonstandard electroconvection in a bent-core nematic liquid crystal. Phys Rev E. 2005;72:041712.
   Web of Science ®Google Scholar
• Tanaka S, Takezoe H, Éber N, et al. Electroconvection in nematic mixtures of bent-core and calamitic molecules. Phys Rev E. 2009;80:021702.
   Web of Science ®Google Scholar
• Salamon P, Éber N, Buka Á, et al. Dielectric properties of mixtures of a bent-core and a calamitic liquid crystal. Phys Rev E. 2010;81:031711.
   Web of Science ®Google Scholar
• Tadapatri P, Hiremath US, Yelamaggad CV, et al. Permittivity, conductivity, elasticity, and viscosity measurements in the nematic phase of a bent-core liquid crystal. J Phys Chem B. 2010;114:1745–1750.
   PubMed Web of Science ®Google Scholar
• Sathyanarayana P, Mathew M, Li Q, et al. Splay bend elasticity of a bent-core nematic liquid crystal. Phys Rev E. 2010;81:010702–4R.
   Web of Science ®Google Scholar
• Kaur S. Elastic properties of bent-core nematic liquid crystals: the role of the bend Angle. Liq Cryst. 2016;43:2277–2284.
   Web of Science ®Google Scholar
• Dorjgotov E, Fodor-Csorba K, Gleeson JT, et al. Viscosities of a bent-core nematic liquid crystal. Liq Cryst. 2008;35:149–155.
   Web of Science ®Google Scholar
• Parthasarathi S, Shankar Rao DS, Fodor Csorba K, et al. Viscoelastic behaviour of a binary system of strongly polar bent-core and rod-like nematic liquid crystals. J Phys Chem B. 2014;118:14526–14535.
   PubMed Web of Science ®Google Scholar
• Francescangeli O, Samulski ET. Insights into the cybo- tactic nematic phase of bent-core molecules. Soft Matter. 2010;6:2413–2420.
   Web of Science ®Google Scholar
• Francescangeli O, Vita F, Ferrero C, et al. Cybotaxis dominates the nematic phase of bent-core mesogens: a small-angle diffuse X-ray diffraction study. Soft Matter. 2011;7:895–901.
   Web of Science ®Google Scholar
• Dingemans TJ, Madsen LA, Francescangeli O, et al. The biaxial nematic phase of oxadiazolebiphenol mesogens. Liq Cryst. 2013;40:1655–1677.
   Web of Science ®Google Scholar
• Keith C, Lehmann A, Baumeister U, et al. Nematic phases of bent-core mesogens. Soft Matter. 2010;6:1704–1721.
   Web of Science ®Google Scholar
• Chakraborty S, Gleeson JT, Jakli A, et al. A comparison of short-range molecular order in bent-core and rod-like nematic liquid crystals. Soft Matter. 2013;9:1817–1824.
   Web of Science ®Google Scholar
• Samulski ET. Meta-cybotaxis and nematic biaxiality. Liq Cryst. 2010;37:669–678.
   Web of Science ®Google Scholar
• Kumar S, Gowda AN. The chemistry of bent-core molecules forming nematic liquid crystals. Liq Cryst Rev. 2015;3:99–145.
   Web of Science ®Google Scholar
• Nguyen J, Wonderly W, Tauscher T, et al. The effects of lateral halogen substituents on the low-temperature cybotactic nematic phase in oxadiazole based bent-core liquid crystals. Liq Cryst. 2015;42:1754–1764.
   Web of Science ®Google Scholar
• Addis J, Kaur S, Binks DJ, et al. Second-harmonic generation and the influence of flexoelectricity in the nematic phases of bent-core oxadiazoles. Liq Cryst. 2016;43:1315–1332.
   Web of Science ®Google Scholar
• Tschierske C, Photinos DJ. Biaxial nematic phases. J Mater Chem. 2010;20:4263–4294.
   Web of Science ®Google Scholar
• Madsen LA, Dingemans TJ, Nakata M, et al. Thermotropic biaxial nematic liquid crystals. Phys Rev Lett. 2004;92:145505.
   PubMed Web of Science ®Google Scholar
• Han J. 1,3,4-Oxadiazole based liquid crystals. J Mater Chem C. 2013;1:7779–7797.
   Web of Science ®Google Scholar
• Bates MA. Bent core molecules and the biaxial nematic phase: a transverse dipole widens the optimal angle. Chem Phys Lett. 2007;437:189–192.
   Web of Science ®Google Scholar
• Qu S, Lu Q, Wu S, et al. Two dimensional directed π–π interactions in a linear shaped bi-1,3,4-oxadiazole derivative to achieve organic single crystal with highly polarized fluorescence and amplified spontaneous emissions. J Mater Chem. 2012;22:24605–24609.
   Web of Science ®Google Scholar
• Speetjens F, Lindborg J, Tauscher T, et al. Low nematic onset temperatures and room temperature cybotactic behaviour in 1,3,4-oxadiazole-based bent-core mesogens possessing lateral methyl groups. J Mater Chem. 2012;22:22558–22564.
   Web of Science ®Google Scholar
• Daniela A, Mehl GH. The design and investigation of laterally functionalised oxadiazoles. J Mater Chem. 2007;17:4711–4715.
   Web of Science ®Google Scholar
• Naoum MM, Seliger H, Happ E. Effect of structural changes on mesophase stability of some model compounds based on the aryl benzoate group. Liq Cryst. 1997;23:247–253.
   Web of Science ®Google Scholar
• Tasaganva G, Kariduraganavar MY, Inamdar SR. Synthesis and nonlinear optical properties of polyurethanes containing nitro-substituted 1,3,4-oxadiazole chromophores. Synth Met. 2009;159:1812–1819.
   Web of Science ®Google Scholar
• Xu C. Preparation and characterization of vapour deposited films based on substituted 2,5-diphenyl-1,3,4-oxadiazole derivatives. Germany: Faculty of Mathematics and Natural Sciences. University of Potsdam; 2004.
   Google Scholar
• Vieira A, Cristiano R, Ely F, et al. Synthesis and characterization of luminescent hockey stick‐shaped liquid crystalline compounds. Liq Cryst. 2006;33:381–390.
   Web of Science ®Google Scholar
• Vieira A, Cristiano R, Bortoluzzi AJ, et al. Luminescent 2,1,3-benzothiadiazole-based liquid crystalline compounds. J Mol Struct. 2008;875:364–371.
   Web of Science ®Google Scholar
• Srivastava RM, Neves Filho RAW, Schneider R, et al. Synthesis, optical properties and thermal behaviour of 1,3,4‐oxadiazole‐based twin dimers. Liq Cryst. 2008;35:737–742.
   Web of Science ®Google Scholar
• He T, Wang Y, Tian X, et al. An organic dye with very large Stokes-shift and broad tunability of fluorescence: potential two-photon probe for bioimaging and ultra-sensitive solid-state gas sensor. Appl Phys Lett. 2016;108:011901.
   Web of Science ®Google Scholar
• Huang C, Peng X, Yi D, et al. Dicyanostilbene-based two-photon thermo-solvatochromic fluorescence probes with large two-photon absorption cross sections: detection of solvent polarities, viscosities, and temperature. Sens Actuators B. 2013;182:521–529.
   Web of Science ®Google Scholar
• Balaguez RA, Ricordi VG, Duarte RC, et al. Bis-arylsulfenyl- and bis-arylselanyl-benzo-2,1,3-thiadiazoles: synthesis and photophysical characterization. RSC Adv. 2016;06:49613–49624.
   Web of Science ®Google Scholar
• Wang H, Chen F, Jia X, et al. Controllable molecular aggregation and fluorescence properties of 1,3,4-oxadiazole derivatives. J Mater Chem C. 2015;3:11681–11688.
   Web of Science ®Google Scholar
• Hayer A, de Halleux V, Kohler A, et al. Highly fluorescent crystalline and liquid crystalline columnar phases of pyrene-based structures. J Phys Chem B. 2006;110:7653–7659.
   PubMed Web of Science ®Google Scholar
• Imrie CT. Laterally substituted dimeric liquid crystals. Liq Cryst. 1989;6(4):391–396.
   Web of Science ®Google Scholar
• Van Roie B, Leys J, Denolf K, et al. Weakly first-order character of the nematic-isotropic phase transition in liquid crystals. Phys Rev E. 2005;72:041702.
   Web of Science ®Google Scholar
• Belaissaoui A, Cowling SJ, Goodby JW. Mesogenic properties of two 1,3,4-oxadiazole-based bent-core geometrical isomers. Liq Cryst. 2013;40:421–427.
   Web of Science ®Google Scholar
• Chan TN, Lu Z, Yam WS, et al. Non-symmetric liquid crystal dimers containing an isoflavone moiety. Liq Cryst. 2012;39:393–402.
   Web of Science ®Google Scholar
• Lee HC, Lu Z, Henderson PA, et al. Cholesteryl-based liquid crystal dimers containing a sulfur–sulfur link in the flexible spacer. Liq Cryst. 2012;39(2):259–268.
   Web of Science ®Google Scholar
• Mukherjee PK, Pleiner H, Brand HR. Simple Landau model of the smectic-A-isotropic phase transition. Eur Phys J E. 2001;4:293–297.
   Web of Science ®Google Scholar
• Chandran A, Choudhary A, Singh P, et al. Probing the dynamics of geometrically confined ferroelectric mesogens at the air interface. Soft Matter. 2015;11:749–755.
   PubMed Web of Science ®Google Scholar
• Kaur S, Addis J, Greco C, et al. Understanding the distinctive elastic constants in an oxadiazole bent-core nematic liquid crystal. Phys Rev E. 2012;86:041703.
   Web of Science ®Google Scholar
• Xiang Y, Goodby JW, Gçrtz V, et al. Revealing the uniaxial to biaxial nematic liquid crystal phase transition via distinctive electroconvection. Appl Phys Lett. 2009;94:193507.
   Web of Science ®Google Scholar
• Gleeson HF, Kaur S, Gortz V, et al. The nematic phases of bent-core liquid crystals. Chem Phys Chem. 2014;15:1251–1260.
   Web of Science ®Google Scholar
• Chandran A, Prakash J, Joshi T, et al. Probing the effect of temperature and electric field on the low frequency dielectric relaxation in a ferroelectric liquid crystal mesogen. J Mol Liq. 2014;198:280–285.
   Web of Science ®Google Scholar
• Shanker G, Prehm M, Nagaraj M, et al. 1,2,4-oxadiazole-based bent-core liquid crystals with cybotactic nematic phases. Chem Phys Chem. 2014;15:1323–1335.
   Web of Science ®Google Scholar
• Nafees A, Sinha A, Rao NVS, et al. Design, synthesis and mesomorphic behaviour of four-ring achiral bent-core liquid crystal in the nematic phase. RSC Adv. 2016;6:43069–43079.
   Web of Science ®Google Scholar