日本液晶学会討論会講演予稿集
Online ISSN : 2432-5988
Print ISSN : 1880-3490
ISSN-L : 1880-3490
2019年日本液晶学会討論会
セッションID: 2B09
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ネマチック液晶中でホスホール系色素が示す負の蛍光異方性
*大園 拓哉谷田部 哲夫ワン チェンガン深澤 愛子山口 茂弘
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Here, we unveil fluorescence anisotropies of a series of phosphole oxide-based dyes with an elongated -conjugated system, on which the transition dipole moment lies, in nematic liquid crystals. We observe that, as the number, size, and rigidity of substituents protruding from the pi-conjugated plane increase, the transition dipole moment tends to tilt away from the nematic director over the magic angle, ~54.7°, showing conspicuous negative fluorescence anisotropy. Analysis of molecular shapes suggests that the substitutions modulate the interaction with the nematic mean field, impacting the direction of the principal molecular axis aligned with the nematic director.

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