Efficient and simple colorimetric fluoride ion sensor based on receptors having urea and thiourea binding sites |
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Authors: | Jose D Amilan Kumar D Krishna Ganguly Bishwajit Das Amitava |
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Institution: | Central Salt and Marine Chemicals Research Institute, Bhavnagar 364002, Gujarat, India. |
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Abstract: | structure: see text] Novel colorimetric receptors for selective fluoride ion sensing containing anthraquinone as chromogenic signaling subunit and urea (N,N' '-(9,10-dihydro-9,10-dioxo-1,2-anthracenediyl)bisN'-phenyl])/thiourea (N,N' '-(9,10-dihydro-9,10-dihydro-9,10-dioxo-1,2-antrhacenediyl)bisN-phenyl]) binding sites have been reported. These receptors have shown no affinity for other halide ions (Cl-, Br-, and I- ions). Well-defined color change in the visible region of the spectrum was observed upon addition of fluoride ion in DMSO/CH3CN solution of the receptors 1 and 2. |
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