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    • 6. 发明授权
    • Photochromic compounds
    • 光致变色化合物
    • US5847168A
    • 1998-12-08
    • US980724
    • 1997-12-01
    • Frank J. Hughes
    • Frank J. Hughes
    • C07D493/04G02B5/23C07D311/78
    • C07D493/04G02B5/23
    • A photochromic article that includes a host material and a photochromic amount of a naphthopyran compound, the naphthopyran compound represented by the formula: ##STR1## wherein R.sub.1 ', R.sub.2 ', R.sub.3 ', R.sub.4 ', R.sub.5 ', R.sub.6 ', R.sub.7 ', R.sub.8 ', R.sub.9 ', R.sub.10 ', R.sub.1 ", R.sub.2 ", R.sub.3 ", R.sub.4 ", R.sub.5 ", R.sub.6 ", R.sub.7 ", R.sub.8 ", R.sub.9 ", and R.sub.10 " are each selected from the following group: a stable organic radical, a heterocyclic group, halogen, a nitrogen-substituted group, and a nitrogen-substituted ring compound.
    • 一种光致变色制品,其包含主体材料和光致变色量的萘并吡喃化合物,由下式表示的萘并吡喃化合物:其中R1',R2',R3',R4',R5',R6',R7' R8',R9',R10',R1“,R2”,R3“,R4”,R5“,R6”,R7“,R8”,R9“和R10” 各自选自以下组:稳定的有机基团,杂环基,卤素,氮取代基和氮取代的环化合物。