Abstract
Ruthenium(II)-polypyridyl-based chemosensor [Ru(bpy)2(phimtp)](PF6)2 (1) has been developed for selective detection of Fe3+ ions in aqueous medium with ppm level detection limit (0.11 ppm). Spectroscopic studies revealed that receptor 1 exhibited efficient turn-off sensing toward Fe(III). Receptor 1 acted as a reversible sensor for Fe3+ ions in presence of Na2EDTA and the corresponding logic gate was developed. The chelation through N and S atoms of 1, triggered the color change selectively by Fe3+, detected by low cost colorimetric, paper strips and polymer films. The water solubility, reversibility and optical visualization make the present chemosensor ideal for practical applications on real samples.
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