Process for the preparation of metal-organic frameworks

Process for the preparation of metal-organic frameworks having maximum particle diameters of 500 nm, wherein a solution containing metal ions is mixed with a bidentate or multidentate ligand compound to form metal-ligand complexes, the solution is heated to initiate crystal growth, then all resulting solid particles having a diameter of >20 nm are separated off, the solution is cooled at a rate of at least 10 K/min, the particle size of the frameworks present in the solution is monitored, and a growth inhibitor is added to the solution on reaching a particle size in the range of up to 500 nm.