申请人:Ciba-Geigy Corporation
公开号:US05177227A1
公开(公告)日:1993-01-05
Compounds of formula I or V, or mixtures thereof, ##STR1## wherein R is unsubstituted C.sub.6 -C.sub.14 aryl or C.sub.6 -C.sub.14 aryl which is substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 alkylthiol, phenyl, benzyl, --CN,--CF.sub.3, halogen or --COOR.sub.5, and R.sub.5 is H, C.sub.1 -C.sub.18 alkyl, cyclohexyl, cyclopentyl, phenyl, C.sub.1 -C.sub.12 alkylphenyl, benzyl or C.sub.1 -C.sub.12 alkylbenzyl, and at least one of the substituents R.sub.1 to R.sub.4 is an organic thiol, sulfoxyl or sulfonyl group, and the other members R.sub.1 to R.sub.4 are H, F, Cl or Br, are reversible photochromic systems which can be used for contrast formation or light absorption.
化合物的化学式为I或V,或其混合物,其中R是未取代的C.sub.6 -C.sub.14芳基或被C.sub.1 -C.sub.12烷基,C.sub.1 -C.sub.12烷氧基,C.sub.1 -C.sub.12烷硫基,苯基,苄基,--CN,--CF.sub.3,卤素或--COOR.sub.5取代的C.sub.6 -C.sub.14芳基,R.sub.5是H,C.sub.1 -C.sub.18烷基,环己基,环戊基,苯基,C.sub.1 -C.sub.12烷基苯基,苄基或C.sub.1 -C.sub.12烷基苄基,且取代基R.sub.1到R.sub.4中至少有一个是有机硫醇,亚氧化硫或磺酰基,其余成员R.sub.1到R.sub.4为H,F,Cl或Br,是可逆的光致变色系统,可用于对比度形成或光吸收。