Fig. 2: Pore size distributions of MOF channels.

a The 1D MIL-53(MP) channels of ~5.2 × 8.9 Å in diameter. b The Al-TCPP channel composed of ~8 Å 1D channels and ~6 Å 2D interlayer spaces. c The 3D porous UiO-66 channel composed of ~12 Å octahedral cavities, ~9 Å tetrahedral cavities, and ~6 Å triangular windows.