Photochromic Properties of 3-Deoxyanthocyanidin Pigments in Nontoxic Solvents

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 betwee...

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Bibliographic Details
Published in:Journal of food science 2016-12, Vol.81 (12), p.E2950-E2955
Main Authors: Yagishita, Yuki, Mihara, Mai, Kohno, Yoshiumi, Shibata, Masashi
Format: Article
Language:English
Subjects:
anthocyanin
Anthocyanins - analysis
Apigenin - analysis
Butylene Glycols - chemistry
cereal
Color
Cosmetics
Dielectric constant
Ethanol
Ethanol - chemistry
Ethyl alcohol
Food Handling
Food Irradiation
Food processing
Food science
Foods
photochromism
Pigments
plant extract
Plant Extracts - analysis
Plant Leaves - chemistry
Solvents
Solvents - chemistry
Tea - chemistry
Ultraviolet Rays
Whole Grains - chemistry
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Summary: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. Practical Application 3‐Deoxyanthocyanidin pigments extracted from plant sources and dissolved in an aqueous solution of 1,3‐butanediol or ethanol is a safe and nontoxic photochromic liquid. It can be a part of contents of photochromic micro capsules (powder or dispersion) used in a jet‐printer ink for food and cosmetic products.
ISSN:0022-1147
1750-3841
DOI:10.1111/1750-3841.13548