Two novel anionic indium–tetracarboxylate frameworks: Syntheses, structures and photoluminescent properties

Abstract Two unusual indium–organic frameworks, InMOF- 1 and InMOF- 2 , have been successfully obtained by solvothermal reaction of trivalent indium ions and two flexible aromatic tetracarboxylate ligands. These compounds were characterized by single-crystal X-ray diffraction, IR spectroscopy, and powder X-ray diffraction (PXRD) measurement. In virtue of tetrahedral tri-positive and tetra-negative building blocks, their frameworks both exhibit anionic feature and are isomorphous in topology: twofold interpenetrating dia three-dimensional (3D) frameworks. Additionally, their solid-state photoluminescent properties have also been further investigated.