Two novel calixarene-based fluoroionophores were synthesized. Their conformations were confirmed to 1,3-alternate by X-ray crystal structures. From CHEF by blocking the PET mechanism in fluorescence spectra, we observed In3+ and Pb2+ion selectivity over other metal ions. For In3+ion, calix-bis-azacrown-5 showed about 20 times more sensitive than calix-mono-azacrown-5 because the source of the binding selectivity comes from the calixarene framework and azacrown ligand by controlling the fluorescence and PET mechanisms associated with the amine moiety.
ASJC Scopus subject areas
- General Chemistry