Anthraquinone Dyes Exhibiting Negative Dichroism in Liquid Crystals I. Derivatives of 1-amino-and 1, 4-Diaminoanthraquinones

Abstract
Anthraquinone dyes with negative dichroism in liquid crystals have been synthesized; value of the negative dichroism are of practical interest. The structural influence for the dichroic dyes on their dichroism in liquid crystals is discussed.

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