Figure 1.

The family of isostructural HUMs reported herein and their single-crystal X-ray structures, single-component adsorption isotherms, and isosteric heats of adsorption

(A) Schematic illustration of the building blocks and pcu network topology of M′FSIX-pypz-M and NbOFFIVE-pypz-M.

(B) C₂H₂ binding site in SIFSIX-21-Ni viewed across diagonally opposite F atoms of SiF₆^2- pillars.

(C) The ultramicropore in SIFSIX-21-Ni viewed along the crystallographic b axis.

(D) C₂H₂ and CO₂ isotherms of SIFSIX-21-Ni, NbOFFIVE-3-Ni, and TIFSIX-4-Ni at 298 K.

(E) C₂H₂ and CO₂ isotherms of SIFSIX-21-Cu, NbOFFIVE-3-Cu, and TIFSIX-4-Cu at 298 K.

(F) Comparative bar diagram of isosteric heat of adsorptions (C₂H₂ and CO₂). (Color codes in Figures 1A–1C: C, gray; N, blue; Si, yellow; F, light green; Ni, cyan.)