Figure 4

Up: Energy-dispersive X-ray spectroscopy (EDX) of [Zr-UiO-66-PDC-SO₃H]Cl and Zr-UiO-66-PDC. Down: Elemental mapping analysis of [Zr-UiO-66-PDC-SO₃H]Cl. The structures of the compounds were drawn using Chem Office 12.0 (Cambridge Soft).