Structure–property relationships in twist-bend nematogens: the influence of terminal groups

References

• Cestari M, Diez-Berart S, Dunmur DA, et al. Phase behavior and properties of the liquid-crystal dimer 1 “,7 “-bis(4-cyanobiphenyl-4 ‘- yl) heptane: a twist-bend nematic liquid crystal. Phys Rev E. 2011;84(3):031704.
   Web of Science ®Google Scholar
• Meyer RB. In les houches summer school in theoretical physics. In: Balian RG, Weil G, editors. Molecular fluids. New York: Gordon and Breach; 1976. p. 273–373.
   Google Scholar
• Dozov I. On the spontaneous symmetry breaking in the mesophases of achiral banana-shaped molecules. Europhys Lett. 2001;56(2):247–253.
   Google Scholar
• Emsley JW, Lelli M, Lesage A, et al. A comparison of the conformational distributions of the achiral symmetric liquid crystal dimer CB7CB in the achiral nematic and chiral twist-bend nematic phases. J Phys Chem B. 2013;117(21):6547–6557.
   PubMed Web of Science ®Google Scholar
• Borshch V, Kim YK, Xiang J, et al. Nematic twist-bend phase with nanoscale modulation of molecular orientation. Nat Commun. 2013;4:2635.
   PubMed Web of Science ®Google Scholar
• Chen D, Porada JH, Hooper JB, et al. Chiral heliconical ground state of nanoscale pitch in a nematic liquid crystal of achiral molecular dimers. Proc Natl Acad Sci U S A. 2013;110(40):15931–15936.
   PubMed Web of Science ®Google Scholar
• Zhu CH, Tuchband MR, Young A, et al. Resonant carbon k-edge soft x-ray scattering from lattice-free heliconical molecular ordering: soft dilative elasticity of the twist-bend liquid crystal phase. Phys Rev Lett. 2016;116(14):147803.
   PubMed Web of Science ®Google Scholar
• Imrie CT, Henderson PA. Liquid crystal dimers and higher oligomers: between monomers and polymers. Chem Soc Rev. 2007;36(12):2096–2124.
   PubMed Web of Science ®Google Scholar
• Imrie CT, Henderson PA, Yeap G-Y. Liquid crystal oligomers: going beyond dimers. Liq Cryst. 2009;36(6–7):755–777.
   Web of Science ®Google Scholar
• Imrie CT, Henderson PA. Liquid crystal dimers and oligomers. Curr Opin Colloid Interface Sci. 2002;7(5–6):298–311.
   Web of Science ®Google Scholar
• Luckhurst GR. Liquid-crystal dimers and oligomers - experiment and theory. Macromol Symp. 1995;96:1–26.
   Google Scholar
• Panov VP, Nagaraj M, Vij JK, et al. Spontaneous periodic deformations in nonchiral planar-aligned bimesogens with a nematic-nematic transition and a negative elastic constant. Phys Rev Lett. 2010;105(16):167801.
   PubMed Web of Science ®Google Scholar
• Sepelj M, Lesac A, Baumeister U, et al. Intercalated liquid-crystalline phases formed by symmetric dimers with an α,ω-diiminoalkylene spacer. J Mater Chem. 2007;17(12):1154–1165.
   Web of Science ®Google Scholar
• Chen D, Nakata M, Shao R, et al. Twist-bend heliconical chiral nematic liquid crystal phase of an achiral rigid bent-core mesogen. Phys Rev E. 2014;89(2):022506.
   PubMed Web of Science ®Google Scholar
• Jansze SM, Martinez-Felipe A, Storey JMD, et al. A twist-bend nematic phase driven by hydrogen bonding. Angew Chem-Int Ed. 2015;54(2):643–646.
   PubMed Web of Science ®Google Scholar
• Wang Y, Singh G, Agra-Kooijman DM, et al. Room temperature heliconical twist-bend nematic liquid crystal. Cryst Eng Comm. 2015;17(14):2778–2782.
   Web of Science ®Google Scholar
• Mandle RJ, Goodby JW. Progression from nano to macro science in soft matter systems: dimers to trimers and oligomers in twist-bend liquid crystals. RSC Adv. 2016;6(41):34885–34893.
   Web of Science ®Google Scholar
• Mandle RJ, Goodby JW. A liquid crystalline oligomer exhibiting nematic and twist-bend nematic mesophases. Chem Phys Chem. 2016;17(7):967–970.
   Web of Science ®Google Scholar
• Sebastian N, Lopez DO, Robles-Hernandez B, et al. Dielectric, calorimetric and mesophase properties of 1ʹ’-(2ʹ,4-difluorobiphenyl-4ʹ-yloxy)-9ʹ’-(4-cyanobiphenyl-4ʹ-yloxy)nonane: an odd liquid crystal dimer with a monotropic mesophase having the characteristics of a twist-bend nematic phase. Phys Chem Chem Phys. 2014;16(39):21391–21406.
   PubMed Web of Science ®Google Scholar
• Mandle RJ, Davis EJ, Lobato SA, et al. Synthesis and characterisation of an unsymmetrical, ether-linked, fluorinated bimesogen exhibiting a new polymorphism containing the N-TB or ‘twist-bend’ phase. Phys Chem Chem Phys. 2014;16(15):6907–6915.
   PubMed Web of Science ®Google Scholar
• Lu Z, Henderson PA, Paterson BJA, et al. Liquid crystal dimers and the twist-bend nematic phase. The preparation and characterisation of the α,ω-bis(4-cyanobiphenyl-4ʹ-yl) alkanedioates. Liq Cryst. 2014;41(3):471–483.
   Web of Science ®Google Scholar
• Dawood AA, Grossel MC, Luckhurst GR, et al. On the twist-bend nematic phase formed directly from the isotropic phase. Liq Cryst. 2016;43(1):2–12.
   Web of Science ®Google Scholar
• Mandle RJ, Davis EJ, Archbold CT, et al. Microscopy studies of the nematic NTB phase of 1,11-di-(1ʹ’-cyanobiphenyl-4-yl)undecane. J Mater Chem C. 2014;2(3):556–566.
   PubMed Web of Science ®Google Scholar
• Ivsic T, Vinkovic M, Baumeister U, et al. Towards understanding the N-TB phase: a combined experimental, computational and spectroscopic study. RSC Adv. 2016;6(6):5000–5007.
   Web of Science ®Google Scholar
• Mandle RJ, Voll CCA, Lewis DJ, et al. Etheric bimesogens and the twist-bend nematic phase. Liq Cryst. 2016;43(1):13–21.
   Web of Science ®Google Scholar
• Paterson DA, Gao M, Kim Y-K, et al. Understanding the twist-bend nematic phase: the characterisation of 1-(4-cyanobiphenyl-4ʹ-yloxy)-6-(4-cyanobiphenyl-4ʹ-yl) hexane (CB6OCB) and comparison with CB7CB. Soft Matter. 2016;12:6827-6840. DOI:10.1039/C6SM00537C 
   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
• Mandle RJ, Davis EJ, Archbold CT, et al. Apolar bimesogens and the incidence of the twist-bend nematic phase. Chem Eur J. 2015;21(22):8158–8167.
   PubMed Web of Science ®Google Scholar
• Mandle RJ, Davis EJ, Voll CCA, et al. The relationship between molecular structure and the incidence of the N-TB phase. Liq Cryst. 2015;42(5–6):688–703.
   Web of Science ®Google Scholar
• Mandle RJ, Goodby JW. Dependence of mesomorphic behaviour of methylene-linked dimers and the stability of the NTB/NX phase upon choice of mesogenic units and terminal chain length. Chem Eur J. 2016;22:9366–9374.
   PubMed Web of Science ®Google Scholar
• Paterson DA, Xiang J, Singh G, et al. Reversible isothermal twist-bend nematic-nematic phase transition driven by the photoisomerization of an azobenzene-based nonsymmetric liquid crystal dimer. J Am Chem Soc. 2016;138(16):5283–5289.
   PubMed Web of Science ®Google Scholar
• Ahmed Z, Welch C, Mehl GH. The design and investigation of the self-assembly of dimers with two nematic phases. RSC Adv. 2015;5(113):93513–93521.
   Web of Science ®Google Scholar
• Sepelj M, Baumeister U, Ivsic T, et al. Effects of geometry and electronic structure on the molecular self-assembly of naphthyl-based dimers. J Phys Chem B. 2013;117(29):8918–8929.
   PubMed Web of Science ®Google Scholar
• Ivsic T, Baumeister U, Dokli I, et al. Sensitivity of the NTB phase formation to the molecular structure of imino-linked dimers. Liq Cryst. 2016;43. DOI:10.1080/02678292.02672016.01225832
   Google Scholar
• Gorecka E, Vaupotic N, Zep A, et al. (N-TB) phase of chiral materials. Angew Chem, Int Ed. 2015;54(35):10155–10159.
   PubMed Web of Science ®Google Scholar
• Adlem K, Copic M, Luckhurst GR, et al. Chemically induced twist-bend nematic liquid crystals, liquid crystal dimers, and negative elastic constants. Phys Rev E. 2013;88(2):022503.
   Web of Science ®Google Scholar
• Cestari M, Frezza E, Ferrarini A, et al. Crucial role of molecular curvature for the bend elastic and flexoelectric properties of liquid crystals: mesogenic dimers as a case study. J Mater Chem. 2011;21(33):12303–12308.
   Web of Science ®Google Scholar
• Xiang J, Li YN, Li Q, et al. Electrically tunable selective reflection of light from ultraviolet to visible and infrared by heliconical cholesterics. Adv Mater. 2015;27(19):3014–3018.
   PubMed Web of Science ®Google Scholar
• Archbold CT, Davis EJ, Mandle RJ, et al. Chiral dopants and the twist-bend nematic phase - induction of novel mesomorphic behaviour in an apolar bimesogen. Soft Matt. 2015;11(38):7547–7557.
   PubMed Web of Science ®Google Scholar
• Dabrowski R. From the discovery of the partially bilayer smectic A phase to blue phases in polar liquid crystals. Liq Cryst. 2015;42(5–6):783–818.
   Web of Science ®Google Scholar
• Frisch MJ. al. e. Gaussian 09 (revision B.01).:Wallingford CT:Gaussian Inc.;2010.
   Google Scholar
• Smith GD, Jaffe RL, Yoon DY. Conformational characteristics of 1,3-dimethoxypropane and poly(oxytrimethylene) based upon ab initio electronic structure calculations. J Phys Chem. 1996;100(32):13439–13446.
   Web of Science ®Google Scholar
• De Luca G, Emsley JW, Lesage A, et al. The structures and conformations of mesogenic molecules in the pre-transitional region of the isotropic phase: 5OCB and MBBA and their mixtures. Liq Cryst. 2012;39(2):211–219.
   Web of Science ®Google Scholar
• Emsley JW, De Luca G, Lesage A, et al. The structure and conformation of a mesogenic compound between almost zero and almost complete orientational order. Liq Cryst. 2007;34(9):1071–1093.
   Web of Science ®Google Scholar
• Cacelli I, Lami CF, Prampolini G. Force-field modeling through quantum mechanical calculations: molecular dynamics simulations of a nematogenic molecule in its condensed phases. J Comp Chem. 2009;30(3):366–378.
   PubMed Web of Science ®Google Scholar
• Tarini M, Cignoni P, Montani C. Ambient occlusion and edge cueing for enhancing real time molecular visualization. IEEE Trans Vis Comp Graph. 2006;12(5):1237–1244.
   PubMed Web of Science ®Google Scholar
• Dennington R, Keith T, Millam J. Gauss view, version 5. Shawnee Mission, KS: Semichem Inc; 2009.
   Google Scholar
• Luckhurst GR. Liquid crystals: a chemical physicist’s view. Liq Cryst. 2005;32(11–12):1335–1364.
   Web of Science ®Google Scholar
• Henderson PA, Cook AG, Imrie CT. Oligomeric liquid crystals: from monomers to trimers. Liq Cryst. 2004;31(11):1427–1434.
   Web of Science ®Google Scholar
• Humphries RL, James PG, Luckhurst GR. A molecular field treatment of liquid crystalline mixtures. Symp Faraday Soc. 1971;5:107–118.
   Google Scholar
• Greco C, Luckhurst GR, Ferrarini A. Molecular geometry, twist-bend nematic phase and unconventional elasticity: a generalised maier-saupe theory. Soft Matt. 2014;10(46):9318–9323.
   PubMed Web of Science ®Google Scholar
• Gray GW. The molecular physics of liquid crystals. London (UK): Academic Press; 1979. p. Chap. 1.
   Google Scholar
• Attard GS, Date RW, Imrie CT, et al. Nonsymmetrical dimeric liquid-crystals - the preparation and properties of the α-(4-cyanobiphenyl-4ʹ-yloxy)-ω-(4-n-alkylanilinebenzylidene-4ʹ-oxy)alkanes. Liq Cryst. 1994;16(4):529–581.
   Web of Science ®Google Scholar
• Goodby JW, Mandle RJ, Davis EJ, et al. What makes a liquid crystal? The effect of free volume on soft matter. Liq Cryst. 2015;42(5–6):593–622.
   Web of Science ®Google Scholar
• Dunmur DA. The magic of cyanobiphenyls: celebrity molecules. Liq Cryst. 2015;42(5–6):678–687.
   Web of Science ®Google Scholar
• Paterson DA, Storey JMD, Imrie CT. Liq Cryst. 2016. DOI: 10.1080/02678292.2016.1274293
   Web of Science ®Google Scholar
• Imrie CT. Non-symmetric liquid crystal dimers: how to make molecules intercalate. Liq Cryst. 2006;33(11–12):1449–1454.
   Web of Science ®Google Scholar
• Yeap GY, Hng TC, Yeap SY, et al. Why do non-symmetric dimers intercalate? the synthesis and characterisation of the α-(4-benzylidene-substituted-aniline-4ʹ-oxy)-ω-(2-methylbutyl-4ʹ-(4ʹ’-phenyl)benzoateoxy)alkanes. Liq Cryst. 2009;36(12):1431–1441.
   Web of Science ®Google Scholar
• Blatch AE, Fletcher ID, Luckhurst GR. The intercalated smectic-A phase - the liquid-crystal properties of the α(4-cyanobiphenyl-4ʹ-yloxy)-ω-(4-alkyloxycinnamoate)alkanes. Liq Cryst. 1995;18(5):801–809.
   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
• Henderson PA, Niemeyer O, Imrie CT. Methylene-linked liquid crystal dimers. Liq Cryst. 2001;28(3):463–472.
   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
• Emerson APJ, Luckhurst GR. On the relative propensities of ether and methylene linkages for liquid-crystal formation in calamitics. Liq Cryst. 1991;10(6):861–868.
   Web of Science ®Google Scholar
• Ferrarini A, Luckhurst GR, Nordio PL, et al. Understanding the dependence of the transitional properties of liquid crystal dimers on their molecular geometry. Liq Cryst. 1996;21(3):373–382.
   Web of Science ®Google Scholar
• Ferrarini A, Luckhurst GR, Nordio PL, et al. Prediction of the transitional properties of liquid-crystal dimers - a molecular-field calculation based on the surface tensor parametrization. J Chem Phys. 1994;100(2):1460–1469.
   Web of Science ®Google Scholar
• Imrie CT, 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
• Attard GS, Garnett S, Hickman CG, et al. Asymmetric dimeric liquid-crystals with charge-transfer groups. Liq Cryst. 1990;7(4):495–508.
   Web of Science ®Google Scholar