A coumarin based ICT probe for fluoride in aqueous medium with its real application.

摘要: A new coumarin based hydrazone (receptor 1) synthesized by modifying one of our earlier reported receptor detected fluoride ion selectively through naked eye in aq. DMSO (5:95, v/v). It was also able to detect a toothpaste sample. The addition 1 equiv. as its tetrabutylammonium salt the 5 x 10(-5) M solution produced red color while similar acetate faint pink color. dihydrogenphosphate and variety other anions were not produce any significant change with under experimental conditions. corresponding UV-vis measurements showed bathochromic shifting 455 nm band 514 484 for acetate, respectively. non-linear fittings titration data 1:1 binding equation yielded association constants 10(5):1 ratio (1)H NMR titrations studies shade further light on their mode 1. quantum mechanical calculations time dependant density functional theory (TD-DFT) using basis set b3lyp/6-311g** supported findings nicely.