Synthesis and characterization of some benzothioate derivatives and investigation of extractions with Cr3+, Co2+, Cu2+, Mn2+, Fe3+, Zn2+ ions

Abstract

The biological importance of thiol compounds has increased the interest in these compounds in recent years. Thioester, thioether and disulfide compounds obtained from thiol compounds selectively bind metals such as gold, silver, iron, mercury, cadmium, zinc. Therefore, the complexes obtained have many usage areas such as luminescence, solar cells and panels, catalyst systems, adsorbents, photovoltaic cells, etc. In this study, ortho/meta/para-chloro-aromatic benzothioate derivatives (L1-L3) containing disulfide bonds were synthesized by thioesterification reaction. Characterizations were carried out by FT-IR, 1 H-NMR, 13 C-NMR and LC-MS/MS techniques. The complexes of synthesized benzothioate derivatives and Cr 3+ , Co 2+ , Cu 2+ , Mn 2+ , Fe 3+ , Zn 2+ ions were determined by liquid-liquid extraction (dichloromethane:water (1:1)). Extraction equilibrium constants Kext, KD, Ext%, ΔG o ext values were determined. L1 and L2 ligand extracted the most Cr 3+ ion (Ext%: 47.84% and 78.96%, respectively), and L3 ligand extracted the most Fe 3+ ion (Ext%: 98.95%).