Abstract
A new phenanthro(9,10-d)imidazole based colorimetric receptor CPH have been synthesized and characterized. CPH is selectively sensing Cu2+ ions by quenching of blue fluorescence under 365nm UV light. Besides, the receptor CPH detects fluoride ions by a change in fluorescence color from blue to green and differentiate the fluoride ions from the other competing anions. The CPH–F− complex formed during the sensing is reversible by treating with the acid, so the CPH receptor can be reusable. The DFT calculations and the 1H NMR experiment also support the sensing mechanism of F− by CPH.
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