Photochromic material
View Patent ↗Photochromic dyes are disclosed. A photochromic dye can include a first photo-reactive group and a second photo-reactive group. A first photochromic reaction can be induced in the first photo-reactive group of the photochromic dye by radiation having a first wavelength, and a second photochromic reaction can be induced in the second photo-reactive group of the photochromic dye by radiation having a second wavelength.
1. A photochromic dye having at least two different photo-reactive groups coupled to one another, comprising: a first photo-reactive group coupled to a second photo-reactive group that is different from the first photo-reactive group, wherein the first photo-reactive group and the second photo-reactive group are independently represented by Formula I:
wherein, R 1 , R 3 to R 8 , and R 10 to R 11 independently represent hydrogen, a halogen, a substituted or unsubstituted C 1-12 alkyl, a substituted or unsubstituted C 1-12 alkoxy, a substituted or unsubstituted C 1-12 alkenyl, a substituted or unsubstituted C 1-12 conjugated alkyl, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group; or the substituents together form an alkylene or alkenylene chain completing an aryl group; and wherein: R 2 and R 9 independently represent a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group; or R 2 and R 3 and R 9 and R 10 together form an alkylene or alkenylene chain completing an aryl group.
2. The photochromic dye of claim 1 , wherein R 2 and R 9 independently represent a phenyl; or R 2 and R 3 , or R 9 and R 10 together form a benzene or naphthyl.
3. The photochromic dye of claim 1 , wherein the photochromic group of Formula I is selected from the group consisting of Formula I-2 to I-9:
wherein R′ and R″ independently represent hydrogen, a halogen, a substituted or unsubstituted C 1-6 alkyl, or a substituted or unsubstituted C 1-6 alkoxy.
4. The photochromic dye of claim 1 , wherein the first photo-reactive group and the second photo-reactive group are coupled to one another by a non-conjugated linkage selected from the group consisting of C 1-12 alkylene, C 1-12 heteroalkylene, C 1-6 alkylenoxy, and C 1-6 alkylenedioxy.
5. The photochromic dye of claim 1 , wherein the first photo-reactive group is configured to undergo a first photochromic reaction in response to radiation having first wavelength, and the second photo-reactive group is configured to undergo a second photochromic reaction in response to radiation having second wavelength.