Overcoming Crystallinity Limitations of Aluminium Metal-Organic Frameworks by Oxalic Acid Modulated Synthesis

Overcoming Crystallinity Limitations of Aluminium Metal-Organic Frameworks by Oxalic Acid Modulated Synthesis

Canossa, S. (TU Delft ChemE/Catalysis Engineering; Universiteit Antwerpen)
Gonzalez Nelson, A.M. (TU Delft ChemE/Catalysis Engineering; Dutch Polymer Institute)
Shupletsov, Leonid (External organisation)
del Carmen Martin, Maria (External organisation)
van der Veen, M.A. (TU Delft ChemE/Catalysis Engineering)

2020

A modulated synthesis approach based on the chelating properties of oxalic acid (H₂C₂O₄) is presented as a robust and versatile method to achieve highly crystalline Al-based metal-organic frameworks. A comparative study on this method and the already established modulation by hydrofluoric acid was conducted using MIL-53 as test system. The superior performance of oxalic acid modulation in terms of crystallinity and absence of undesired impurities is explained by assessing the coordination modes of the two modulators and the structural features of the product. The validity of our approach was confirmed for a diverse set of Al-MOFs, namely X-MIL-53 (X=OH, CH₃O, Br, NO₂), CAU-10, MIL-69, and Al(OH)ndc (ndc=1,4-naphtalenedicarboxylate), highlighting the potential benefits of extending the use of this modulator to other coordination materials.

aluminium
chelates
crystal growth
metal-organic frameworks
modulated synthesis

http://resolver.tudelft.nl/uuid:88f48e9e-1892-4213-b9b1-4fd853f7ac9b

https://doi.org/10.1002/chem.201904798

0947-6539

Chemistry: A European Journal, 26 (16), 3564-3570

Institutional Repository

journal article

© 2020 S. Canossa, A.M. Gonzalez Nelson, Leonid Shupletsov, Maria del Carmen Martin, M.A. van der Veen