Triazole-naphthalene based fluorescent chemosensor for highly selective naked eye detection of carbonate ion and real sample analyses

Abstract

Herein, the design and synthesis of triazole-naphthalene hybrid for selective colorimetric and fluorometric sensing of carbonate ion has been reported. The probe has been thoroughly characterized by 1H and 13C NMR and HRMS spectroscopy. CK exhibits an excellent selectivity and sensitivity towards carbonate ions over other anions by changes in both UV–Vis absorption spectra and emission spectra. The limit of detection of carbonate ion in absorbance and emission spectra has 7.2 nM and 1.8 μM respectively. The plausible sensing was confirmed with the help of the Job's plot, FTIR, NMR titration and theoretical studies. Also, naked eye detection method of carbonate from colorless to yellow color is the most conspicuous application of probe CK. The receptor CK providing valuable practical sensor for environmental analyses of carbonate ion. Further, we mimic new logic gate circuit by using the sensing performance of carbonate ion with probe.