Tripodal, Squaramide-Based Ion Pair Receptor for Effective Extraction of Sulfate Salt

Autor: Damian Jagleniec, Marcin Wilczek, Jan Romański
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Molecules, Vol 26, Iss 9, p 2751 (2021)
Druh dokumentu: article
ISSN: 26092751
1420-3049
DOI: 10.3390/molecules26092751
Popis: Combining three features—the high affinity of squaramides toward anions, cooperation in ion pair binding and preorganization of the binding domains in the tripodal platform—led to the effective receptor 2. The lack of at least one of these key elements in the structures of reference receptors 3 and 4 caused a lower affinity towards ion pairs. Receptor 2 was found to form an intramolecular network in wet chloroform, which changed into inorganic–organic associates after contact with ions and allowed salts to be extracted from an aqueous to an organic phase. The disparity in the binding mode of 2 with sulfates and with other monovalent anions led to the selective extraction of extremely hydrated sulfate anions in the presence of more lipophilic salts, thus overcoming the Hofmeister series.
Databáze: Directory of Open Access Journals
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