ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Synthesis of a new molecule, its effect on bacterial growth, and its use in potentiometric sensor applications for the selective, reliable and low cost determination of Cr³⁺ ions

Oguz Özbek, Abdulkadir Akyasan, Caglar Berkel, and Kiymet Berkil Akar

Department of Molecular Biology and Genetics, Faculty of Science and Arts, Tokat Gaziosmanpaşa University, Tokat, Turkey

E-mail: oguz.ozbek@gop.edu.tr

Received: 2 September 2025  Accepted: 21 November 2025

Abstract:

In this study, a new molecule, 2,3-dihydronaphtho[2,3-b][1,4]oxathiine-5,10-dione, as an alternative to commercial ionophores, was synthesized. Following the characterization of the synthesized molecule, polymer membrane ionselective sensors were prepared using it as an ionophore. The prepared sensors exhibited very high selectivity against Cr(III) ions among fifteen different cationic species. The newly developed Cr(III)–selective sensors had a very low detection limit of 8.34 × 10⁻⁸ mol L⁻¹ and Nernstian response of 20.4 ± 1.02 mV/decade in a wide concentration range of 1.0 × 10⁻¹–1.0 × 10⁻⁷ mol L⁻¹. The newly proposed sensor had also a wide pH working range (5.0–9.0), very fast response time (7s) and good reproducibility. Besides, the sensor was shown to be able to determine Cr(III) ions in various samples with very high recoveries. Finally, the antimicrobial properties of the newly synthesized molecule against certain bacterial species were investigated using disk diffusion technique, and the growth of particular species was found to be inhibited by this molecule to a certain extent.

Keywords: Ion-selective electrodes; Anti-microbial activity; Potentiometry; Chromium; Ionophore

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-025-04545-z

Chemical Papers 80 (3) 2715–2727 (2026)