An Anion Chemosensor Based on Flavone Quasi-crown Ether Metal Complex

Abstract

Abstract: A novel metal complex [Ca(L)] 2+ (1)[or [Mg(L)] 2+ (2)] based on the flavone derivative with a quasi-crown ether(4′-(dimethylamino)-3,6-(tetraethylene glycol)flavone) was synthesized and studied as anion-binding receptors. Remarkable color change of host 1 or 2 induced by the complex formation with HSO₄^-(or H₂PO₄^-) was observed. The UV-Vis spectroscopic titration experiments indicated the formation of 1:1 stable complexes between 1 or 2 and HSO₄^-. HSO₄^-(or H₂PO₄^-) can also be selectively detected by the fluorescence method,which is even more sensitive than the UV-Vis spectroscopic method. The binding manner using double binding sites and possible structures formed between complex 1 or 2 and selected anions were proposed. The results showed the dye-containing metal complexes could act as the efficient and selective chromogenic and fluorescent reagents for anion sensing.

Key words: Metal-complex, Anionic recognition, Colorimetry, Oxoanions

CLC Number:

O641.4

TrendMD:

ZHOU Li-Li, LI Hua-Ping, WANG Hui, FENG Lin, ZHANG Xiao-Hong, WU Shi-Kang . An Anion Chemosensor Based on Flavone Quasi-crown Ether Metal Complex[J]. Chem. J. Chinese Universities, 2004, 25(8): 1525.

References

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