Crystal structure, morphology and sorption behaviour of porous indium-tetracarboxylate framework materials

Abstract

In this report, two totally new indium-tetracarboxylate framework isomers based on the same starting tetracarboxylate ligand are presented, namely, [Me₂NH₂][In(BPTC)]·Guest (InOF-12) and [Hdabco][In(BPTC)]·Guest (InOF-13). Their corresponding crystal structures essentially originated from the guest templates and were then fully characterized and solved by single crystal X-ray diffraction analysis. Through low pressure gas capacity comparison, it is noted that desolvated InOF-12 exhibits a better performance and its H₂ isotherm reaches a high uptake capacity value of 1.32 wt% at 77 K and 1.0 bar, and a high carbon dioxide uptake of 82.2 cm³ g⁻¹ (3.67 mmol g⁻¹) at 273 K and 1.0 bar, while InOF-13 has a lower value of 80.4 cm³ g⁻¹ (3.59 mmol g⁻¹) under the same conditions.