Fig. 5.

Summary of the adaptive accommodations of different guests by 8PN in various host−guest co-crystal structures. a Molecular size of diphenylamine and single-crystal X-ray structure of 8PN-NDP. b Molecular size of N-phenylnaphthalen-2-amine and single-crystal X-ray structure of 8PN-NPNA. c Molecular size of 3-hexylthiophene and single-crystal X-ray structure of 8PN-SC6. d Molecular size of pyrene and single-crystal X-ray structure of 8PN-PY. e single-crystal X-ray structure of 8PN-3PY. Color code for TPE-4pn: green, C; yellow, N; orange, O; gray, H. Color code for guests: pink, C; yellow, H; blue, N; light green, S, except that C atoms of the three pyrene molecules in the unit cell of 8PN-3PY are colored pink, light green, and light blue, respectively, for clarity