The mixture of sodium chrysin-6-sulfonate and chrysin-8-sulfonate was obtained by sulfonating chrysin and then reacted with ZnSO₄ to get the corresponding Zn derivatives, which were separated according to the difference of their solubility in hot water. The pure Zn chrysin-6-sulfonate was transfered to the corresponding pure sodium sulfonate by the coordination and depolymerization procedures. Sodium 5,7-bihydroxyflavone-6-sulfonate (sodium chrysin-6-sulfonate) as a ligand reacted with Al(III) to afford a aluminium complex. All of new compounds were characterized by ¹H NMR, IR, UV techniques and elemental analysis. And the fluorescence of the aluminium complex is explored as well.

Key words: chrysin, sulfation, coordination interaction, aluminium chrysin-6-sulfonate, fluorescence