For example, the [Pd2L4] 4+ cage reveal a prominent peak at 4.7 Å, indicative of a conserved interaction between the cage and the triflate counterion (Figure ). Notably, Lusby and coworkers showed that this counterion exhibits strong binding affinity to the [Pd2L4] 4+ cavity. 102 Similar results were observed for the [Zn3L3] 6+ and [Fe5L5] 10+ knots, indicating a strong binding interaction at 5.7 Å and 7.7 Å, respectively. Indeed, the authors showed that the [Fe5L5] 10+ knot is capable of extracting chloride traces from solvent and glassware. and Figure for further details).