Highly Efficient and Selective Recognition of Dicyanoaurate(I) by a Bambusuril Macrocycle in Water
| Autoři | |
|---|---|
| Rok publikování | 2022 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Angewandte Chemie International Edition |
| Fakulta / Pracoviště MU | |
| Citace | |
| www | https://onlinelibrary.wiley.com/doi/10.1002/anie.202210184 |
| Doi | http://dx.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)](-). |
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