Fig. 3: DFT-D calculated host-guest interactions of NTU-98.

a C2 hydrocarbons located at the small cage center, b at the cage corner N site, and c at the cage corner O site. Color code: Zn, light green; C, gray; O, red; N, blue; H, white; C2H2: orange; C2H4: dark green; C2H6, purple; The green and yellow dashed lines indicate hydrogen bonding and C-H…π interaction, respectively.