DETECTION OF ALKALI AND ALKALINE-EARTH IONS WITH OIL-SOLUBLE FLUORESCENCE PROBE MOLECULE IN AQUEOUS-SOLUTIONS

An oil-soluble flavone derivative (FL-C) with lariat ether was able to coordinate with beta-CD in aqueous solution to form 1 : 1 host-guest complex. Because it was still located at the outside of beta-CD, the l ariat ether-keeps the complexation ability with alkali and a alkaline- earth cation, leading to the fluorescence intensity change of this com pound. The results indicated that the using of oil-soluble probe in be ta-CD aqueous solution for the detection of alkali and alkaline-earth cations was successful.