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Photochromic Properties of 3‐Deoxyanthocyanidin Pigments in Nontoxic Solvents
Author(s) -
Yagishita Yuki,
Mihara Mai,
Kohno Yoshiumi,
Shibata Masashi
Publication year - 2016
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/1750-3841.13548
Subject(s) - photochromism , solvent , chemistry , pigment , ethanol , ultraviolet , cosmetics , organic solvent , irradiation , photochemistry , organic chemistry , chemical engineering , materials science , physics , optoelectronics , nuclear physics , engineering
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.