Synthesis, characterization and sensor applications of a new 1,4-naphthoquinone derivative molecule

In this study, a new naphthoquinone derivative molecule was synthesized with a very high yield (99.0%), and its sensor properties were investigated. The characterization of the synthesized molecule was carried out using spectroscopic methods such as ¹H-, ¹³C-NMR and FT-IR. Polymer membrane potentiometric sensors were prepared using this molecule as an ionophore, and these newly prepared sensors exhibited selective behavior toward barium(II) ions. The one of barium(II)-selective potentiometric sensors developed had a low detection limit of 3.51 × 10⁻⁶ mol L⁻¹ in a wide concentration range of 1.0 × 10⁻¹–1.0 × 10⁻⁵ mol L⁻¹ and had also a near-Nernstian behavior. The proposed barium(II) selective sensor was shown to have good reproducibility, fast response time (< 5 s), wide pH working range (5.0–10.0) and low cost production. Besides, it could detect barium(II) ions in various water samples with high recoveries; and based on its advantages, it can be proposed as a new alternative in the analysis of barium(II) ions.