Crystal Structure, Mesomorphic and Emission Properties of Liquid Crystals Having a 7-(Diethylamino)-3-phenylcoumarin Core

Haruko Takechi; Kanji Kubo; Hajime Takahashi; Taisuke Matsumoto

doi:10.5650/jos.56.195

Chemistry and Organic Synthesis

Crystal Structure, Mesomorphic and Emission Properties of Liquid Crystals Having a 7-(Diethylamino)-3-phenylcoumarin Core

Haruko Takechi, Kanji Kubo, Hajime Takahashi, Taisuke Matsumoto

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Keywords: crystal structure, cholesteric liquid crystal, fluorescence, coumarin, X-ray crystallographic analysis

JOURNAL FREE ACCESS

2007 Volume 56 Issue 4 Pages 195-200

DOI https://doi.org/10.5650/jos.56.195

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Abstract

Cholesteryl 4-(7-diethylamino-2-oxo-2H-1-benzopyran-3-yl)benzoate (1) had an enantiotropic cholesteric phase. The crystal structure of 1 has been determined by X-ray crystallographic analysis. The crystals of 1 had intermolecular CH···π and CH···O interactions. 7-(Diethylamino)-3-phenylcoumarin derivatives (1) gave a strong emission band at 500 nm in the solid state when excited at 440 nm.

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