Physico-chemical properties and mechanism of color change of methyl 5-hydroxy-dinaphtho [1, 2-2', 3'] furan-7, 12-dione-6-carboxylate

메틸 5-하이드록시 디나프토 [1, 2-2', 3'] 후란-7, 12 디온 6-키복시레이트의 물성 및 변색기전

Physico-chemical properties of methyl 5-hydroxy-dinaphtho[1,2-2',3'] furan-7,12-dione-6-carboxylate(MHDDC) were examined. The yellowish color of the solution at pH 8 below changes to a bluish color when the solution is basified to pH 10 above. This color change was presumed to a change of the molecular structure from a quinoid-type to a quinoid-type with the dissociation to the hydroxyl group as shown in chart 1.