Figure captions:
Figure 1. Schematic illustration of the representative porous structures in MOFs: (a) One-dimensional channel, (b) Cage type pore, and (c) Interlayer cavity.
Figure 2. (a, b) The crystal structures and channel shapes of Zn2(bpy)(btec). (c) Comparison of molecular size difference of C2H2 and C2H4 (Color code: Zn, green; O, red; N, light blue; C, gray).
Figure 3. (a) Single-component sorption isotherms of C2H2, C2H4, and CO2 at 298 K for Zn2(bpy)(btec). (b, c) IAST selectivities of C2H2/C2H4(1/99) and C2H2/CO2(50/50) mixtures on some benchmark materials. (d) Adsorption isotherms of C2H2 for Zn2(bpy)(btec) at 288-308 K. (e) C2H4 and CO2 uptakes of different MOF materials at 1 bar and 298 K. (f) Comparison of C2H2/C2H4(1/99) and C2H2/CO2(50/50) IAST selectivities and C2H2-C2H4-CO2uptake ratios of different adsorbents at 1 bar and 298 K.
Figure 4. Experimental breakthrough (298 K, 1 bar) and desorption (333 K, 1 bar) curves for C2H2/C2H4(1/99) (a, b) and C2H2/CO2 (50/50) (c, d) mixtures on Zn2(bpy)(btec).
Figure 5. (a, b) Single-component adsorption isotherms of CH4, C2H2, C2H4, C2H6, C3H4, C3H6, C3H8, CO2, H2, O2, and N2 in Zn2(bpy)(btec) at 298 K. (c, d) Multi-component breakthrough (298 K, 1 bar) and desorption (333 K, 1 bar) curves for CH4/C2H2/C2H4/C2H6/C3H6/C3H8/CO2/H2(30/1/10/25/10/10/1/13) mixtures on Zn2(bpy)(btec).
Figure 6. Calculated C2H2molecule binding sites in Zn2(bpy)(btec) by GCMC simulation. Color code: Zn (green), O (red), N (light blue), C (gray), and C2H2 (blue).
Figure 7. (a) Scale-up synthesis of [Zn2(bpy)(btec)(H2O)2]·2H2O. (b) TG and DSC curves for as-synthesized [Zn2(bpy)(btec)(H2O)2]·2H2O. (c, d) PXRD patterns of [Zn2(bpy)(btec)(H2O)2]·2H2O after different treatment. (e) Comparison of the heat and water stability of some benchmark MOF materials.