Rapid naked eye sensing of fluoride by calix[4]arene upper rim tetra functionalized pentafluorophenyl hydrazone

ISSN
11440546
Date Issued
2023-06-29
Author(s)
Nehra, Anita
Malik, Apoorva
Sharma, Pragati R.
Bandaru, Sateesh
Sharma, Rakesh K.
DOI
10.1039/d3nj02254d
Abstract
A neutral electron-deficient, pentafluorophenyl hydrazone-functionalized calix[4]arene, R, showed naked eye detection of fluoride among 19 anions. The formation of R + F− was evidenced by UV-vis, 1H & 19F NMR and ESI-MS studies. Variable temperature NMR studies revealed the formation of HF2−. DFT and TD-DFT studies demonstrate strong binding interactions between the R and F−