- Soluble 2,6-Bis(4-pentylphenylethynyl)anthracene as a High Hole Mobility Semiconductor for Organic Field-effect Transistors
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The balance between good solubility and high crystallinity is an advantageous characteristic of 2,6-bis(4-pentylphenyl-ethynyl)anthracene (1). Organic field-effect transistors featuring either a vacuum-deposited film or a simple drop-cast film of 1 both showed high hole mobilities of 0.94 and 0.63 cm2 V-1 s-1, respectively.
- Takaki, Yuta,Wakayama, Yutaka,Ishiguro, Yasushi,Hayakawa, Ryoma,Yamagishi, Masakazu,Okamoto, Toshihiro,Takeya, Jun,Yoza, Kenji,Kobayashi, Kenji
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supporting information
p. 1403 - 1405
(2016/12/03)
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- Tolane derivatives, liquid crystal compositions containing the derivatives and liquid crystal display devices using the compositions
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A tolane derivative, a liquid crystal composition containing the derivative, and a liquid crystal display device including the composition, in which the tolane derivative is represented by the following general formula: STR1 wherein R represents a straigh
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- Synthesis and Physical Properties of Asymmetric Diphenyldiacetylenic Liquid Crystals
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Fifty-six asymmetric diphenyl-diacetylene liquid crystal homologs including dialkyl, alkyl-alkoxy, cyano-alkyl, chloro-alkyl, fluoro-alkyl, difluoro-alkyl, lateral chloro-substituted fluoro-alkyl (or alkoxy), lateral fluoro-substituted asymmetric dialkyl, and vinyl-alkyl are synthesized and their physical properties evaluated.Among these asymmetric diphenyl-diacetylene liquid crystals, many dialkyl homologs exhibit low melting point, wide nematic range, and low heat of fusion.They are ideal host candidates for formulating eutectic mixtures.The polar groups make important contributions to the phase transition temperature, dielectric anisotropy, refractive indices and viscosity.Detailed effects depend on the position of the substitution.These new liquid-crystals compounds and mixtures are particularly useful for electro-optic modulation of infrared radiation. - Keywords: Diphenyl-diacetylenes, eutectic mixtures, electro-optic modulation, physical properties
- Meng, H.-H. B.,Dalton, L. R.,Wu, S.-T.
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p. 303 - 314
(2007/10/02)
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- Chloro tolanes
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Chloro tolanes of the formula I STR1 wherein R1 denotes alkyl with up to 12 carbon atoms wherein one or two non-adjacent CH2 groups may also be replaced by --O--, --O--CO--, --CO--O-- and/or --CH=CH--, A is trans-1,4-cyclohexylene or 1,4-phenylene, r is 0 or 1, s is 0 or 1, L1 and L2 are H or F, whereby one of the substituents L1 and L2 is F and the other is H or F and if s is 0 and R1 is alkyl having 2 to 12 carbon atoms both L1 and L2 may be H are suitable as components of liquid crystalline media.
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