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A Thorium Metal‐Organic Framework with Outstanding Thermal and Chemical Stability
Journal article

A Thorium Metal‐Organic Framework with Outstanding Thermal and Chemical Stability

Korey P Carter, J. August Ridenour, Mark Kalaj and Christopher L Cahill
Chemistry : a European journal, Vol.25(29), pp.7114-7118
05/23/2019
DOI: 10.1002/chem.201901610
PMID: 30970154
url
https://www.osti.gov/biblio/1510096View
Open Access

Abstract

A new thorium metal‐organic framework (MOF), Th(OBA)2, where OBA is 4,4′‐oxybis(benzoic) acid, has been synthesized hydrothermally in the presence of a range of nitrogen‐donor coordination modulators. This Th‐MOF, described herein as GWMOF‐13, has been characterized by single‐crystal and powder X‐ray diffraction, as well as through a range of techniques including gas sorption, thermogravimetric analysis (TGA), solid‐state UV/Vis and luminescence spectroscopy. Single‐crystal X‐ray diffraction analysis of GWMOF‐13 reveals an interesting, high symmetry (cubic Ia3‾ d) structure, which yields a novel srs‐a topology. Most notably, TGA analysis of GWMOF‐13 reveals framework stability to 525 °C, matching the thermal stability benchmarks of the UiO‐66 series MOFs and zeolitic imidazolate frameworks (ZIFs), and setting a new standard for thermal stability in f‐block based MOFs. Strong and stable: A new thorium metal‐organic framework (MOF), Th(OBA)2, where OBA is 4,4′‐oxybis(benzoic) acid, has been synthesized hydrothermally in the presence of a range of nitrogen‐donor coordination modulators. TGA analysis reveals framework stability to 525 °C, setting a new standard for thermal stability in f‐block based MOFs.
 actinides carboxylate ligands metal-organic frameworks X-ray diffraction

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