1180
XCage: A tricyclic octacationic receptor for perylene diimide with picomolar affinity in water, (W. Liu, S. Bobbala, C. L. Stern, J. E. Hornick, Y. Liu, A. E. Enciso, E. A. Scott, J. F. Stoddart), J. Am. Chem. Soc. 2020, 142, 3165–3173.