Triphenodioxazine compound, method for preparing the same, use of the compound as dichroic dye, and liquid crystal composition
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United States of America Patent
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Apr 10, 2001
Grant Date -
N/A
app pub date -
May 28, 1999
filing date -
May 29, 1998
priority date (Note) -
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Abstract
A novel triphenodioxazine compound represented by the formula (1), a process for preparing the same, use of the compound as a dichroic dye, and liquid crystal composition containing the compound are disclosed. The compound is useful as a dichroic dye having a narrow light absorption band and a high dichroic ratio. ##STR1## (In the formula, each of Y.sup.1 to Y.sup.4 stands for a group represented by the formula (2) or (3); h is an integer of 1 to 2; A stands for phenylene or the like; E stands for phenylene or the like; G stands for H, F, or the like; i is an integer of 1 to 2; j is an integer of 0 to 2, each of J and M stands for phenylene or the like; and Q stands for H, F or the like.) ##STR2##
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