Publication details
Highly Efficient and Selective Recognition of Dicyanoaurate(I) by a Bambusuril Macrocycle in Water
| Authors | |
|---|---|
| Year of publication | 2022 |
| Type | Article in Periodical |
| Magazine / Source | Angewandte Chemie International Edition |
| MU Faculty or unit | |
| Citation | |
| web | https://onlinelibrary.wiley.com/doi/10.1002/anie.202210184 |
| Doi | http://dx.doi.org/10.1002/anie.202210184 |
| Keywords | Anion Binding; Bambusurils; Dicyanoaurate; Gold Extraction; Host-Guest Complexes |
| Description | 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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