Cuboctahedron-based indium–organic frameworks for gas sorption and selective cation exchange

Abstract

[Me₂NH₂]₃[In₃(BTB)₄]·2DMF·2DMA·28H₂O (InOF-9) is an anionic indium–organic framework based on nanosized cuboctahedrons, which is sustained by tetrahedral [In(COO)₄] nodes and 3-connected tricarboxylates. Although InOF-9 is structurally unstable when exposed to air, it exhibits excellent gas sorption capacity through a supercritical carbon dioxide activation process and selectively encapsulates guest methylene blue cations.