Synthesis and Phase Behavior of a New Thiophene Monomer as Nematic Liquid Crystal

Abstract:

The synthesis of a new liquid crystal thiophene monomer of (E)-4-(6-(3-(thiophen-3-yl)- acryloyloxy) hexyloxy) biphenyl-4’-ethylbenzoate (LC-M) is presented. The chemical structure of this monomer and intermediate compounds was characterized by FT-IR and ¹H-NMR. The phase behavior was investigated by polarizing optical microscopy and differential scanning calorimetry. LC-M showed nematic threaded and schlieren textures on heating and cooling cycles.

• Periodical: Advanced Materials Research (Volumes 989-994)
• Pages: 185-188
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.989-994.185
• Online since: July 2014
• Authors: Lin Wang, Yu Jiao Xie, Xing Xing Zhang, Jian She Hu*
• Keywords: Liquid Crystal, Phase Behavior, Synthesis, Thiophene

References

[1] Sonmez G, Meng H, Zhang Q, Wudl F. A highly stable, new electrochromic polymer: Poly(1, 4-bis(2-(3', 4'-ethylenedioxy)thienyl)-2-methoxy-5-2'-ethylhexyloxy benzene) [J]. Adv Funct Mater. 2003, 13(9): 726–731.

DOI: 10.1002/adfm.200304317

[2] Friend RH, Gymer RW, Holmes AB, et al. Electroluminescence in conjugated polymers [J]. Nature 1999, 397(6715): 121−128.

[3] Huitena HEA, Gelinck GH, van der Putter JBP, et al. Plastic transistors in active-matrix displays -The handling of grey levels by these large displays paves the way for electronic paper [J]. Nature 2001, 414(6864): 599-600.

DOI: 10.1038/414599a

[4] Sokolov AN, Roberts ME, Bao, ZA. Fabrication of low-cost electronic biosensors [J]. Mater. Today 2009, 12(9): 12-20.

DOI: 10.1016/s1369-7021(09)70247-0

[5] Peet J, Kim JY, Coates NE, et al. Efficiency enhancement in low-bandgap polymer solar cells by processing with alkane dithiols [J]. Nat. Mater. 2007, 6(7): 497-500.

DOI: 10.1038/nmat1928

[6] Giovanella U, Pasini M, Freund C, et al. Highly efficient color-tunable oled based on poly(9, 9-dioctylfluorene) doped with a novel europium complex [J]. J. Phys. Chem. C 2009, 113(6): 2290-2295.

DOI: 10.1021/jp809088n

[7] Crone BK, Dodabalapur A, Sarpeshkar R, et al. Organic oscillator and adaptive amplifier circuits for chemical vapor sensing [J]. J Appl Phys. 2002, 91(12): 10140-10146.

DOI: 10.1063/1.1476084

[8] Dimitrakopoulos CD, Malenfant PRL. Organic thin film transistors for large area electronics [J]. Adv Mater. 2002, 14(2): 99-117.

DOI: 10.1002/1521-4095(20020116)14:2<99::aid-adma99>3.0.co;2-9

[9] Sekitani T, Takamiya M, Noguchi Y, et al. A large-area wireless power-transmission sheet using printed organic transistors and plastic MEMS switches [J]. Nat Mater. 2007, 6(6): 413-417.

DOI: 10.1038/nmat1903

[10] Lungenschmied C, Bauer S, Schwödiauer R, et al. Real-time in-situ observation of morphological changes in organic bulk-heterojunction solar cells by means of capacitance measurements [J]. J Appl Phys. 2011, 109(4): 044503-044507.

DOI: 10.1063/1.3549727

[11] Ichikawa M, Yamamura K, Jeon HG, et al. Effects of volatile additives in solutions used to prepare polythiophene-based thin-film transistors [J]. J Appl Phys. 2011, 109(5): 054504-054509.

DOI: 10.1063/1.3553878

[12] Hu J S, Li Q, Liu Y N, Song Y T. New chiral liquid crystal monomers and cholesteric polyacrylates: synthesis and characterization [J]. Liq cryst. 2013, 40(8): 1095-1104.

DOI: 10.1080/02678292.2013.796411