CO2 diffusion is an important physical phenomenon that influences the CO2 capture performance of porous solid adsorbents. Following on from earlier studies that measured CO2 diffusion in MOFs with pulsed-field gradient NMR (PFG NMR) methods, we explored CO2 diffusion in the material Zn2(dobdc) (dobdc 4-= 2,5-dioxidobenzene-1,4-dicarboxylate). Similar to the M2(dobpdc) materials discussed above, this material features one-dimensional hexagonal channels in an ordered lattice (Figure ). The Zn(II) ions have a vacant coordination site, which is the primary binding site for CO2. The one-dimensional pores of this material, and the lack of connectivity between different pores in the crystal structure, should result in a significant diffusion anisotropy, i.e. CO2 self-diffusion along the pores (D//) is anticipated to be much faster than diffusion between pores D ⊥ .