Relation between Molecular Structures of Dichroic Dyes and Their Solubilities in Fluorinated Liquid Crystals

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概要

• 論文の詳細を見る

• A molecular design rule for dichroic dyes with a high solubility in fluorinated liquidcrystals has been investigated. Molecular interactions and a concept of motional segmentsproportional to molecular weight were introduced to explain the deviation from an idealsolution. A semi-empirical equation was obtained: log C=-20.75 (ΣΔHf/T - ΣΔSf)- 0.013(Eh - Ep)+2.32, where C represents a saturated solubility in wt% at T (K). ΣΔHf (kJ kg-1)represents the sum of the enthalpies of fusion and of phase-transitions from T to meltingpoint. ΣΔSf represents the sum of the entropies. Calculated Eh represents a hydrationenergy. Ep is the hydrophobic energy determined from calculated 1-octanol log P. Log C ismainly determined by the interaction between dye molecules. Bulky, rigid and asymmetricstructures give a high solubility. Large electrostatic interaction between a dye moleculeand liquid crystal molecules increases solubility.

• INSTITUTE OF PURE AND APPLIED PHYSICSの論文
• 1998-06-15

著者

• IWANAGA Hiroki

  Materials & Devices Research Laboratories, Toshiba Corp

• Naito Katsuyuki

  Advanced Research Laboratory Toshiba Corporation

• Naito Katsuyuki

  Advanced Research Laboratory, Toshiba Corporation, 1, Komukai Toshiba-cho, Saiwai-ku, Kawasaki 210-8582, Japan

• Iwanaga Hiroki

  Materials and Devices Laboratories, Toshiba Corporation, 33, Shinisogo-cho, Isogo-ku, Yokohama 235-0017, Japan

関連論文

• Coumarin and Thiocoumarin Dyes for Guest-Host Type Liquid Crystal Displays
• Highly Soluble Anthraquinone Dyes with CF_3-Groups for Guest-Host Liquid Crystal Displays
• Photoluminescence Properties of Nonpolymeric Amorphous Dyes
• Relation between Molecular Structures of Dichroic Dyes and Their Solubilities in Fluorinated Liquid Crystals
• Relation between Molecular Structures of Dichroic Dyes and Their Solubilities in Fluorinated Liquid Crystals

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