Patent ID: 8658562

Claim:
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 Al 3+ or a coordination complex including metal ion Al 3+ ; and at least an organic precursor of the ligand L, L being a di-, tri-, or tetracarboxylate ligand of formula R 0 (COO − ) q where R 0 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 R 0 radical being optionally substituted by one or more groups independently selected from the group including C 1-10 alkyl, C 2-10 alkene, C 2-10 alkyne, C 3-10 cycloalkyl, C 1-10 heteroalkyl, C 1-10 haloalkyl, C 6-10 aryl, C 3-20 heterocyclic, C 6-10 arylC 1-10 alkyl, C 3-10 heteroarylC 1-10 alkyl, F, Cl, Br, I, —NO 2 , —CN, —CF 3 , —CH 2 CF 3 , —OH, —CH 2 OH, —CH 2 CH 2 OH, —NH 2 , —CH 2 NH 2 , —NHCHO, —COOH, —CONH 2 , —SO 3 H, —PO 3 H 2 , 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.