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Original Articles

The first examples of room temperature liquid crystal dimers based on cholesterol and pentaalkynylbenzene

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Pages 1250-1256 | Received 08 Feb 2015, Accepted 30 Mar 2015, Published online: 19 Jun 2015

References

  • Imrie CT, Henderson PA. Liquid crystal dimers and higher oligomers: between monomers and polymers. Chem Soc Rev. 2007;36(12):2096–2124. doi:10.1039/B714102E.
  • Imrie CT, Henderson PA, Yeap G-Y. Liquid crystal oligomers: going beyond dimers. Liq Cryst. 2009;36(6–7):755–777. doi:10.1080/02678290903157455.
  • Yelamaggad CV, Shanker G, Hiremath US, Krishna Prasad S. Cholesterol-based nonsymmetric liquid crystal dimers: an overview. J Mater Chem. 2008;18(25):2927–2949. doi:10.1039/B804579H.
  • Cha SW, Jin J-I, Achard MF, Hardouin F. Anomalies of periodicity in TGB structures in new liquid crystal dimers. Liq Cryst. 2002;29(6):755–763. doi:10.1080/02678290210129902.
  • Yelamaggad CV, Mathews M, Fujita T, Iyi N. Mesogenic unsymmetric dimers containing cholesteryl ester and tolane moieties. Liq Cryst. 2003;30(9):1079–1087. doi:10.1080/0267829031000152987.
  • Yelamaggad CV, Nagamani SA, Shankar Rao DS, Prasad SK, Hiremath US. Electroclinic effect in unsymmetrical dimeric liquid crystals composed of two non-identical chiral mesogenic entities. Mol Cryst Liq Cryst. 2001;363(1):1–17. doi:10.1080/10587250108025254.
  • Yelamaggad CV, Shashikala IS, Hiremath US, Shankar Rao DS, Prasad SK. Liquid crystal dimers possessing chiral rod-like anisometric segments: synthesis, characterization and electro-optic behaviour. Liq Cryst. 2007;34(2):153–167. doi:10.1080/02678290601137585.
  • Majumdar KC, Ghosh T, Rao DSS, Prasad SK. Unsymmetrical cholesterol and benzoxazole-based liquid crystalline dimers: synthesis and characterisation. Liq Cryst. 2011;38(10):1269–1277. doi:10.1080/02678292.2011.606041.
  • Zhang C, Jin L, Yin B, Jamil M, Jeon Y-J. Synthesis and properties of non-symmetric liquid crystal dimers containing a cholesteryl moiety. Liq Cryst. 2008;35(1):39–44. doi:10.1080/02678290701751764.
  • George M, Mallia VA, Antharjanam PKS, Saminathan M, Das S. Synthesis and photoswitching properties of some cholesterol based liquid crystals. Mol Cryst Liq Cryst. 2000;350(1):125–139. doi:10.1080/10587250008025238.
  • Kim K-N, Do E-D, Kwon Y-W, Jin J-I. Dimesogenic compounds consisting of cholesterol and azobenzene-based moieties: dependence of liquid crystal properties on spacer length and fluorination of the terminal chain. Liq Cryst. 2005;32(2):229–237. doi:10.1080/02678290412331329305.
  • Khan FA, Parasuraman K, Donnio B. Synthesis and thermal properties of rigid oxa-bridged-containing dimers and tetramers. Tetrahedron. 2010;66(45):8745–8755. doi:10.1016/j.tet.2010.09.003.
  • Majumdar KC, Shyam PK, Rao DSS, Prasad SK. Occurrence of unusually wide thermal range enantiotropic twist grain boundary TGBC* phases in unsymmetrical cholesterol and oxadiazole based liquid crystalline dimers. J Mater Chem. 2011;21(2):556–561. doi:10.1039/C0JM02322A.
  • Majumdar KC, Chakravorty S, Pal N, Sinha RK. Synthesis and characterization of cholesterol-based nonsymmetric dimers terminated with ferrocenyl core. Tetrahedron. 2009;65(38):7998–8006. doi:10.1016/j.tet.2009.07.042.
  • Majumdar KC, Ghosh T, Chakravorty S, Pal N, Shankar Rao DS, Prasad SK. Cholesterol-based unsymmetrical Schiff’s base dimer terminated with 4-alkoxy-5-phenylthiophene unit: synthesis and characterisation. Liq Cryst. 2010;37(12):1539–1547. doi:10.1080/02678292.2010.526721.
  • Yelamaggad CV, Nagamani SA, Hiremath US, Nair GG. Cholesterol-based dimeric liquid crystals: synthesis and mesomorphic behaviour. Liq Cryst. 2001;28(7):1009–1015. doi:10.1080/02678290110039499.
  • Hou R, Zhong K-L, Huang Z, Jin LY, Yin B. From smectic to columnar phase of polypedal liquid crystals based on tetrathiafulvalene/1,3-dithiol-2-thione and cholesterol. Tetrahedron. 2011;67(6):1238–1244. doi:10.1016/j.tet.2010.11.088.
  • Lee H-C, Lu Z, Henderson PA, Achard MF, Mahmood WAK, Yeap G-Y, Imrie CT. Cholesteryl-based liquid crystal dimers containing a sulfur–sulfur link in the flexible spacer. Liq Cryst. 2012;39(2):259–268. doi:10.1080/02678292.2011.641753.
  • Pandey A, Singh B. mesogens based on cholesterol derivatives: synthesis and characterization. Mol Cryst Liq Cryst. 2012;562(1):166–176. doi:10.1080/15421406.2012.687323.
  • Sarkar DD, Deb R, Chakraborty N, Mohiuddin G, Nath RK, Nandiraju VSR. Cholesterol-based dimeric liquid crystals: synthesis, mesomorphic behaviour of frustrated phases and DFT study. Liq Cryst. 2013;40(4):468–481. doi:10.1080/02678292.2012.757814.
  • Reddy RA, Tschierske C. Bent-core liquid crystals: polar order, superstructural chirality and spontaneous desymmetrisation in soft matter systems. J Mater Chem. 2006;16(10):907–961. doi:10.1039/B504400F.
  • Hunt JJ, Date RW, Timimi BA, Luckhurst GR, Bruce DW. Toward the biaxial nematic phase of low molar mass thermotropic mesogens: substantial molecular biaxiality in covalently linked rod-disk dimers. J Am Chem Soc. 2001;123(41):10115–10116. doi:10.1021/ja015943q.
  • Attard GS, Imrie CT, Karasz FE. Low molar mass liquid-crystalline glasses: preparation and properties of the .alpha.-(4-cyanobiphenyl-4’-oxy)-.omega.-(1-pyreniminebenzylidene-4’-oxy)alkanes. Chem Mater. 1992;4(6):1246–1253. doi:10.1021/cm00024a025.
  • Song Z-Q, Zhao K-Q, Hu P, Wang B-Q. Synthesis and mesomorphism of cholesteryl-containing triphenylenes with glass states and liquid crystal phases. Acta Chim Sinica. 2008;66(11):1344–1352.
  • Hauser A, Thieme M, Saupe A, Heppke G, Krüerke D. Surface-imaging of frozen blue phases in a discotic liquid crystal with atomic force microscopy. J Mater Chem. 1997;7(11):2223–2229. doi:10.1039/A703272B.
  • Kawata K. Orientation control and fixation of discotic liquid crystal. Chem Rec. 2002;2(2):59–80. doi:10.1002/tcr.10015.
  • Chien S-C, Chen H-H, Chen H-C, Yang Y-L, Hsu H-F, Shih T-L, Lee -J-J. Stable, low-temperature discotic nematic superstructures by incorporating a laterally substituted sidearm in hexakis(phenylethynyl)benzene discogens. Adv Funct Mater. 2007;17(12):1896–1902. doi:10.1002/adfm.200601019.
  • Kumar S, Varshney SK, Chauhan D. Room-temperature discotic nematic liquid crystals. Mol Cryst Liq Cryst. 2003;396(1):241–250. doi:10.1080/15421400390213573.
  • Langner M, Praefcke K, Kruerke D, Heppke G. Chiral radial pentaynes exhibiting cholesteric discotic phases. J Mater Chem. 1995;5(4):693–699. doi:10.1039/JM9950500693.
  • Praefcke K, Kohne B, Gündogan B, Singer D, Demus D, Diele S, Pelzl G, Bakowsky U. News on nematic-biaxial liquid crystals1. Mol Cryst Liq Cryst. 1991;198(1):393–405. doi:10.1080/00268949108033415.
  • Date RW, Bruce DW. Shape amphiphiles: mixing rods and disks in liquid crystals. J Am Chem Soc. 2003;125(30):9012–9013. doi:10.1021/ja0357947.
  • Kouwer PHJ, Mehl GH. Full miscibility of disk- and rod-shaped mesogens in the nematic phase. J Am Chem Soc. 2003;125(37):11172–11173. doi:10.1021/ja037075y.
  • Fletcher ID, Luckhurst GR. The synthesis and characterization of novel non-symmetric dimers with rod-like and disc-like mesogenic units. Liq Cryst. 1995;18(2):175–183. doi:10.1080/02678299508036611.
  • Gupta M, Bala I, Pal SK. A room temperature discotic mesogenic dyad based-on triphenylene and pentaalkynylbenzene. Tetrahedron Lett. 2014;55(42):5836–5840. doi:10.1016/j.tetlet.2014.08.091.
  • Gupta SK, Setia S, Sidiq S, Gupta M, Kumar S, Pal SK. New perylene-based non-conventional discotic liquid crystals. RSC Adv. 2013;3(30):12060–12065. doi:10.1039/C3RA41186A.

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