Anthraquinone type compound and liquid crystal composition containing such compound
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United States of America Patent
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Jan 15, 1991
Issued Date -
N/A
app pub date -
Jan 2, 1990
filing date -
Oct 29, 1985
priority date (Note) -
Expired
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Abstract
An anthraquinone type compound which is represented by the following general formula (I) and which exhibits yellow to orange-colored hue; and a composition for liquid crystal display element obtained by dissolving the compound into liquid crystal: ##STR1## (where: X.sup.1 and X.sup.2 denote sulfur or selenium; and R.sup.1 and R.sup.2 represent a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted pyridyl group, a substituted or unsubstituted pyrmidyl group or a tetrahydronaphthyl group, with the following exceptions: (1) X.sup.1 =X.sup.2 =S; R.sup.1 =R.sup.2 =a substituted or unsubstituted phenyl group = (2) X.sup.1 =X.sup.2 =S; R.sup.1 =a substituted or unsubstituted naphthyl group; R.sup.2 =a phenyl group or a naphthyl group (3) X.sup.1 =X.sup.2 =Se; R.sup.1 =R.sup.2 =a tetrahydronaphthyl group).
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