Highly Efficient and Selective Recognition of Dicyanoaurate(I) by a Bambusuril Macrocycle in Water

• Autoři: RANDO Carola; VAZQUEZ GONZALVEZ Julian; SOKOLOV Jan; KOKAN Zoran; NEČAS Marek; ŠINDELÁŘ Vladimír
• Rok publikování: 2022
• Druh: Článek v odborném periodiku
• Časopis / Zdroj: Angewandte Chemie International Edition
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• www: https://onlinelibrary.wiley.com/doi/10.1002/anie.202210184
• Doi: https://doi.org/10.1002/anie.202210184
• Klíčová slova: Anion Binding; Bambusurils; Dicyanoaurate; Gold Extraction; Host-Guest Complexes
• Popis: Dicyanoaurate(I) anion, [Au(CN)(2)](-), plays a central role in the current industrial production of gold, as its extraction from crude ore samples represents the most money-consuming step. Herein, we present the strongest host-guest recognition of dicyanoaurate anion using the bambusuril receptor in water, a highly competitive solvent. The micromolar stability of such a complex facilitated the up to date most efficient supramolecular stripping of dicyanoaurate from activated carbon at ambient temperature. Thermodynamic characteristics of bambusuril binding with [Au(CN)(2)](-) differing from binding of other inorganic chaotropic anions are rationalized, as well as the bambusuril selectivity for [Au(CN)(2)](-) over [Ag(CN)(2)](-).

Související projekty

• CETOCOEN Excellence
• CETOCOEN Excellence
• Monofunkcializované bambusurily a jejich supramolekulární vlastnosti