Abstract
Mannich Base (MB) based (β-Amino carbonyl compound) (4) was synthesized by adopting one pot Mannich reaction by taking 3,4-dihydroxybenzaldehyde, aniline and acetophenone as starting materials and the product was characterized using analytical techniques such as FT-IR, NMR, mass spectrometry, UV-Visible spectroscopy. The compound 4 utilized as colorimetric sensor for selective sensing of F- ions. The particular sensing of F- is obviously noticeable to the naked eye with a dissimilar colour variation. The F- detection mechanism has been examined by UV-visible and 1H NMR titration experimentations. The 1H NMR titration data describes the deprotonation of OH and N-H protons by F- as a noticeable stage in the detection. Furthermore, the studies was also carried out for reproduction of deprotonated 4 using trifluoroacetic acid as protonating agent. In addition, Boolean logic gates were fabricated for demonstrating the fluoride sensing mechanism and compound 4 in methyl cellulose biofilm was also been made and effectively used for film based detection of fluoride ion.
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