The synthesis and characterization of 22-membered diazapentathia macrocycles and investigation of their ion extraction capability from aqueous media

Abstract

Two new macrocyclic ligands, (5) and (6), containing nitrogen-sulfur donor atoms were designed and synthesized in a multi-step reaction sequence. Ion extraction capability of macrocycles (5) and (6) were investigated involving solvent extraction of metal picrates such as Ag + , Hg 2+ , Cd 2+ , Zn 2+ , Cu 2+ , Ni 2+ , Mn 2+ , Co 2+ and Pb 2+ from aqueous phase to the organic phase. The metal picrate extractions were carried out at 25 ± 0.1°C and extractions were measured by u.v.-visible spectrometry. The extractability and selectivity of the mentioned metal picrates were evaluated depending on the organic solvents used for extraction. The extraction constant (log K ex ) and the complex composition of each metal complex were determined using spectroscopic methods.

Synthesis and characterization of monoazathiacrown ethers as ionophores for polymeric membrane silver-selective electrodes

“…Furthermore, many studies have indicated that the ionic additives can improve the electrode response and for monovalent cations the optimal number of anionic sites is usually 50 mol% relative to the ionophore [25]. The results in Table 4 show that the amounts of the ionophore and NaTFPB in a molar ratio of 4:1 present the best results, which is consistent with the fact that compound 16 forms a sandwich complex with silver ion [18].…”

“…Monoazathiacrown ethers 15-22 were synthesized as described before [18]. A solution of 9-11 (0.5 mmol) in DMF (50 mL) and that of 2,2 -thiodiethanethiol (12), benzene-1,2-dithiol (13) or ethane-1,2-dithiol (14) (0.5 mmol) in DMF (50 mL) were added simultaneously to a solution of DMF (50 mL) containing 2 mmol anhydrous Na 2 CO 3 .…”

Synthesis and metal ion binding properties of thiaaza crown macrocycles

“…The structures of novel compounds were characterized by a combination of elemental analysis and 1 H NMR, 13 C NMR, MS spectral data. Compound 1 was synthesized according to reported procedures [12].…”

“…Compound (1) was synthesized in our laboratory according to the procedure described previously [12]. Chloroacetylchloride was purchased from Lanchester.…”

Novel metal-free and metallophthalocyanines containing four 21-membered pentathiadiaza macrocycles: synthesis, characterization, and study of aggregation properties

“…18 Macrocycles that contain sulfur atoms as donor atoms show unusual coordinating behavior and have high abilities to form complexes with some transition metal ions. 19 The synthesis of macrocycles with sulfur donor atoms and their * Correspondence: zekigok@osmaniye.edu.tr attachment to the phthalocyanine skeleton is rare in the literature due to the laborious and time-consuming synthetic procedure and toxic chemicals.…”