fig1

Figure 1. (A) FT-IR spectra of PAF-336 and HBPT; (B) FT-IR spectra of PAF-337 and DMOBPP; (C) Solid-state ¹³C CP-MAS and 2D ¹H-¹³C HETCOR NMR of PAF-336; (D) Solid-state ¹³C CP-MAS NMR of PAF-337; (E) N₂ adsorption isotherms of PAF-336 and PAF-337. FT-IR: Fourier transform-infrared; HBPT: 2,3,6,7,14,15-hexa(4′-bromophenyl)triptycene; DMOBPP: 6,13-dimethoxy-2,3,9,10,18,19,24,25-octa(4′-bromophenyl)pentiptycene; CP-MAS: cross-polarization magic-angle spinning; HETCOR: heteronuclear correlation spectroscopy; NMR: nuclear magnetic resonance.