Fig. 1. (a) Synthesis of ligand L2 and assembly to cage [Pd2L24]; (i) adamantone, TiCl3, LiAlH4, NEt3, THF; (ii) [Pd(CH3CN)4](BF4)2, CD3CN, 70 °C, 15 min (in contrast, ligand L1 assembles to the interpenetrated double-cage [3BF4@Pd4L18]; (iii) [Pd(CH3CN)4](BF4)2, CD3CN, 70 °C, 12 h). Addition of a guest G to [Pd2L24] leads to the formation of a host–guest complex [G@Pd2L24]. (b) Structures of various guest molecules encapsulated by coordination cage [Pd2L24].
