Abstract
N1,N5-bis(pyridin-2-ylmethylene)naphthalene-1,5-diamine (L1) Schiff base conjugate was synthesized by the condensation reaction of 1,5-diamino naphthalene (1,5-DAN) and 2-pyridine carboxaldehyde and spectroscopically evidenced by 1H NMR, 13C NMR and Mass spectrum. The developed Schiff base conjugate was used as a fluorescent chemosensor for the selective recognition of bismuth (Bi3+) ions in the midst of various interfering heavy transition metal ions such as Ag+, Hg2+ and Cu2+ with marked fluorescence enhancement. Based on “switch-on” intramolecular charge transfer (ICT) approach, chemosensor L1 showed specific response towards bismuth ions with a low detection limit of 1.5 × 10−8 M and a high binding constant 7.11 × 105 M−1. Simultaneously, the experimental (Job’s plot, Mass spectrum, and FT-IR) and theoretical (B3LYP-D3/6–311++G(d,p)) analysis were performed for promising the 1:1 binding mode of L1 + Bi3+ complex formation. The chemosensor L1 has been successfully demonstrated in practical applications such as water and food samples, bacterial imaging and logic gate operation producing satisfactory results.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call