A photochromic chromene compound which develops a color of a neutral tint, has high color optical density, a high fading speed and high durability, and has an indeno(2,1-f)naphtho(1,2-b)pyran structure represented by the following formula as the basic skeleton, wherein a sulfur-containing substituent selected from thiol group, alkylthio group, alkoxyalkylthio group, haloalkylthio group, cycloalkylthio group, arylthio group and heteroarylthio group is bonded to the 6-position and/or 7-position carbon atom(s).
一种光致变色的色
烯化合物,其呈现中性色调,具有高色彩光学密度、高褪色速度和高耐久性,并具有以下公式所示的
吲哚并[2,1-f]
萘并[1,2-b]
吡喃结构作为基本骨架,其中选择
硫取代基与6位和/或7位
碳原子键合,所述
硫取代基包括
硫醇基,烷基
硫基,烷
氧基烷基
硫基,卤代烷基
硫基,
环烷基
硫基,芳基
硫基和杂环芳基
硫基。