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Selective separation of hexachloroplatinate(IV) dianions based on exo-binding with cucurbit[6]uril, (H. Wu, Y. Wang, L. O. Jones, W. Liu., L. Zhang, B. Song, X.-Y. Chen, C. L. Stern, G. C. Schatz, J. F. Stoddart), Angew. Chem. Int. Ed. 2021, 60, 17587–17594.