水溶液中におけるケルセチンとCu^<2+>の相互作用

概要

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We had examined about the onionskin dyeing for the purpose of utilizing wasted onionskin. In the last report, silk and cotton cloths were dyed by the dyestuff extracted from onionskin. The hues of dyed cloths were quite different according to the kinds of the mordant metals. In the plant dyeing, the mordant metal has an important role in color development and fixing. It is reported that the dyed cloth has the antibacterial function by the mordanting process. It is expected that plant dye can exhibit a new function in addition to coloring. In this experiments, the interaction between quercetin and Cu^<2+> in aqueous solution was examined. The complex formation of quercetin and Cu^<2+> was suggested from the absorption spectra of these mixed solutions. The density ratio of the complex formation was expected as [quercetin : Cu^<2+>]=[2 : 1] or [3 : 1]. Absorbance of the solution just after mixed was the same value with that of an hour later. So the structure of the complex is stable. The combination of quercetin and Cu^<2+> was influenced by the initial pH of mixed solutions greatly. The absorption wavelength pertain to the complex formation was 506nm at pH9 above and 418nm at pH9 lower.
長野県短期大学の論文
2006-12-27