AI Article Synopsis
- The study explored the photochromic properties of natural 3-deoxyanthocyanidin pigments in safe solvents.
- When luteolinidin was mixed with weakly acidic water and an organic solvent (with a permittivity of 20-34), it showed reversible colors when exposed to UV light and then shielded from light.
- Solvents like 1,3-butanediol and ethanol, which are safe for food and cosmetics, were ideal for this color-changing process, and other 3-deoxyanthocyanidins like apigeninidin and tricetinidin also showed similar photochromic traits.
Article Abstract
The photochromic properties of some naturally occurring 3-deoxyanthocyanidin pigments were investigated in various nontoxic solvents. When luteolinidin, a representative 3-deoxyanthocyanidin, was dissolved in a mixture of weakly acidic water and an organic solvent with a relative permittivity between 20 and 34, it was possible to repeatedly induce coloration via ultraviolet irradiation and decoloration under light-shielded conditions. 1,3-Butanediol and ethanol, which are approved for use in foods, cosmetics, and household goods, were found to be appropriate organic solvents for this process. In addition, we confirmed that other 3-deoxyanthocyanidins, specifically apigeninidin and tricetinidin, which are commonly found in food grains and tea leaves, also exhibit photochromic properties.
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| http://dx.doi.org/10.1111/1750-3841.13548 | DOI Listing |
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