Studies of complexation properties of receptors based on functionalized calix[4]arenes with various complexation centers

• Published in: Russian chemical bulletin Vol. 63; no. 7; pp. 1606 - 1609
• Main Authors: Geide, I. V., Kulyashova, A. E., Prokhorova, P. E., Morzherin, Yu. Yu
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-07-2014
• Subjects: Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Full Articles; Inorganic Chemistry; Organic Chemistry; extraction; complexation; calixarene; ligand; transition metals
• ISSN: 1066-5285; 1573-9171
• DOI: 10.1007/s11172-014-0641-4

Heterophase extraction was used to study complexation properties of ligands on the calix[4]arene platform with separated and unseparated complexation centers with transition metal salts (Ni
2+
, Co
2+
, Fe
2+
, Mn
2+
, Cu
2+
). Calixarenes containing
N
-alkylcarboxamide substituents at the lower rim exhibit higher affinity to binding of transition metal sulfates (extraction degree
E
= 30–60%) than calixarenes containing ester moieties at the lower rim and
N
-alkylsulfonamide moieties at the upper rim. The opposite pattern was observed for calixarenes containing unsubstituted amide fragments. For Fe
2+
, Ni
2+
, and Mn
2+
sulfates, the extraction degree exceeded 50%.