Colorimetric and fluorimetric chemosensor based on upper rim-functionalized calix[4]arene for selective detection of fluoride ion

A new colorimetric and fluorescent chemosensor for fluoride anion based on calix [4] arene bearing four sulfonamide-fluorenone subunits on the upper rim was conveniently synthesized. It showed a remarkable color change as well as the fluorescence quenching upon addition of F- even in the presence of a wide range of anions in DMSO. The binding property of L with F- was studied by a combination of various spectroscopic techniques, such as absorption and emission titration, Job's plot and H-1 NMR titration. It is anticipated that this design with functional group attached to upper rim of calix[4]arene platform can provide a new approach for the development of F- chemosensor. (C) 2020 Elsevier B.V. All rights reserved.

Automated summary

A new colorimetric and fluorescent chemosensor based on calix[4]arene with sulfonamide-fluorenone subunits shows remarkable color change and fluorescence quenching in the presence of fluoride anion. The binding property with F- was studied using various spectroscopic techniques, and this design with functional group attached to upper rim of calix[4]arene platform offers a new approach for the development of F- chemosensor.