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US 2014/0191168 A1Published application
Photochromic material
AssigneeKorea University Research and Business Foundation
InventorDong Hoon CHOI
Life of this patent
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Abstract
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.
Claims20
A stable photochromic dye, comprising:
- at least two photo-reactive groups including:
- a first photo-reactive group configured to undergo a first reversible photochromic reaction in response to radiation having a first wavelength;
- and
- a second photo-reactive group configured to undergo a second reversible photochromic reaction in response to radiation having a second wavelength.
1 more element
A stable photochromic dye, comprising:
- at least two photo-reactive groups including:
- a first photo-reactive group including a first conjugation system reversibly formed in response to radiation having a first wavelength, the first conjugation system exhibiting a first conjugation bond length;
- and
- a second photo-reactive group including a second conjugation system reversibly formed in response to radiation having a second wavelength, the second conjugation system exhibiting a second conjugation bond length that is longer than the first conjugation bond length.
1 more element
A stable photochromic composition, comprising:
- at least one material selected from the group consisting of a polymer, an oligomer, and a monomer;
- and
- at least one photochromic dye incorporated into at least a portion of the at least one material, the at least one photochromic dye having at least two photo-reactive groups that are coupled to one another, wherein the at least one photochromic dye includes:
- a first photo-reactive group configured to undergo a first reversible photochromic reaction in response to radiation having a first wavelength;
- and
- a second photo-reactive group configured to undergo a second reversible photochromic reaction in response to radiation having a second wavelength.
3 more elements
Dependencies are inferred from the claim text.