Charge-tunable indium–organic frameworks built from cationic, anionic, and neutral building blocks.

By using the same ligand, 2,5-furandicarboxylic acid (FDA), and varying synthetic conditions (especially the In3+/FDA ratio), it is possible to access three unique building blocks of indium, demonstrating charge-switching from a positive trimer to a negative monomer and leading to the synthesis of In-MOFs with tunable framework charge. [ABSTRACT FROM AUTHOR]