Fig. 1. (a) Synthesis of PAF-1–ET. (b) Solid-state ¹³C NMR spectra of PAF-1–CH₂Cl and PAF-1–ET illustrating new ¹³C chemical shifts arising from the –CH₂OCH₂CH₂SCH₃ group in PAF-1–ET (73, 48, 39, and 17 ppm) compared with a shift at 43 ppm for the –CH₂Cl group in PAF-1–CH₂Cl. (c) Nitrogen adsorption isotherms of PAF-1, PAF-1–CH₂Cl, and PAF-1–ET measured at 77 K. Closed and open symbols represent adsorption and desorption results, respectively.