| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6493074 | Journal of Photochemistry and Photobiology A: Chemistry | 2011 | 6 Pages |
Abstract
2-Hydroxychalcones are known to be converted to the colored flavylium form under UV irradiation. In this study, the photochemical conversion of two 2-hydroxychalcone derivatives (4â²-dimethylamino-2-hydroxychalcone and 4â²-methoxy-2-hydroxychalcone) has been carried out in the solid matrix by the intercalation into the layer of the clay, montmorillonite. The 2-hydroxychalcone has been adsorbed on the clay by modifying the clay interlayer with a cationic surfactant, dodecyltrimethylammonium chloride. The addition of an acidic compound (benzenesulfonic acid) has induced the successful coloring reaction of the 2-hydroxychalcone derivatives by the conversion to the flavylium under UV irradiation between the clay interlayer. A delayed coloration has been observed on the short time irradiation of 4â²-methoxy-2-hydroxychalcone included in the clay layer.
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Authors
Yoshiumi Kohno, Maki Ito, Mitsuru Kurata, Shuji Ikoma, Masashi Shibata, Ryoka Matsushima, Yasumasa Tomita, Yasuhisa Maeda, Kenkichiro Kobayashi,