Hexaarylbiimidazoles (HABIs) are a class of organic compounds that are imidazole derivatives. In their natural state, HABIs are typically colorless, but when ultraviolet light breaks the bond connecting the two imidazole groups in the molecule, it produces a version that is dark blue.
Hexaarylbiimidazoles (HABIs) are a class of organic compounds that are imidazole derivatives. In their natural state, HABIs are typically colorless, but when ultraviolet light breaks the bond connecting the two imidazole groups in the molecule, it produces a version that is dark blue.
Source: Wikipedia "Hexaarylbiimidazole" · CC BY-SA 4.0
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