Method for hydrothermal preparation of metal-organic framework crystallised porous aluminium carboxylates

A method for hydrothermal preparation of a solid made up of metal-organic frameworks (MOF) of porous and crystallized aluminum carboxylates, including at least the following steps of:

• (i) mixing in an aqueous solvent:
• at least a metal inorganic precursor in the form of a metal Al, a metal salt Al3+ or a coordination complex including metal ion Al3+;
• and
• at least an organic precursor of the ligand L, L being a di-, tri-, or tetracarboxylate ligand of formula R0(COO−)q where R0 represents
• a mono- or poly-cyclic, fused or non fused, aryl radical, including 6 to 50 carbon atoms,
• a mono- or poly-cyclic, fused or non fused, heteroaryl radical including 4 to 50 carbon atoms,
• the R0 radical being optionally substituted by one or more groups independently selected from the group including C1-10 alkyl, C2-10alkene, C2-10alkyne, C3-10cycloalkyl, C1-10heteroalkyl, O1-10 haloalkyl, C6-10aryl, C3-20heterocyclic, C6-10arylC1-10alkyl, C3-10heteroarylC1-10 alkyl, F, Cl, Br, I, —NO2, —CN, —CF3, —CH2CF3, —OH, —CH2OH, —CH2CH2OH, —NH2, —CH2NH2, —NHCHO, —COOH, —CONH2, —SO3H, —PO3H2,
• q=2 to 4;
• (ii) adjusting the pH of the mixture to a pH comprised between 0.2 and 2.9;
• (iii) heating the mixture obtained in (ii) at a temperature higher than 130° C. so as to obtain said solid.