A New Flavonecrown Ether and Its Complexation with Alkali and Alkaline Earth Metal Cations

Abstract

Abstract: Anew kind of flouroionophore flavonecrown ether(FC)[4'-(dimethylamino)-3,6-(tetraethylene)-flavone was synthesized and characterized. The photophysical changes upon complexation with alkali and alkaline earth metal cations can be described in terms of enchancement of the cation-induced intramolecular charge transfer in the flavone owing to the direct interaction between the bound cations and the carbonyl group of the flavone. The magnitude of the photophysical changes is controlled by the size of crown and charge density of the bound cations. Based on the determination of the stability constants, the selectivity of flavonecrown ether is different from the regular crown ether. The results obtained were discussed preliminarily.

Key words: Flavonecrown ether, Complexation, Chemosensor

CLC Number:

O626

TrendMD:

LI Hua-Ping, WANG Peng-Fei, WU Shi-Kang . A New Flavonecrown Ether and Its Complexation with Alkali and Alkaline Earth Metal Cations[J]. Chem. J. Chinese Universities, 1998, 19(9): 1431.

References

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