| 摘要 |
NEW MATERIAL:Compounds of formula I, wherein R is alkyl, cycloalkyl, alkylcycloalkyl, alkoxy, alkoxyalkoxy, alkoxyalkoxyalkoxy, monoalkylamino, dialkylamino, phenyl, alkylphenyl, alkoxyphenyl-substd. or unsubstituted phenyl. EXAMPLE:5-Amino-2,3-dicyane-8-(4'-n-heptylanilino)-1,4-naphthoquinone. USE:Dyes for liquid crystal having the max. wavelength at 700-900nm near the oscillating wavelength of semiconductor laser. PREPARATION:A naphthoquinone compd. of formula II is reacted with an amine compd. of formula III.
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