fig6

Figure 6. (A) Crystal structures of OCF-32, OCF-33, and OCF-34 synthesized through the halogen bond^[71]. Copyright 2022, Royal Society of Chemistry; (B) Schematic illustration of the synthesis of OCF-35 with the unique host-in-host structure through the electrostatic interaction; (C) Solid-state ¹³C CP-MAS NMR spectra of OCF-35; (D) FT-IR spectra of OCF-35; (E) N₂ sorption isotherm at 77 K and the NLDFT pore size distribution plot (inset) of OCF-35. (B-E) were reproduced with permission^[72]. Copyright 2022, Nature Publishing Group. OCF: Organic cage-based framework; CP-MAS: cross-polarization magic-angle spinning; NMR: nuclear magnetic resonance; FT-IR: Fourier-transform infrared spectra; NLDFT: nonlocal density functional theory.