One-step versatile room temperature synthesis of metal(IV) carboxylate MOFs.

The development of room temperature green syntheses of robust MOFs is of great interest to meet the demand of the sustainable chemistry and is a pre-requisite for the incorporation of functional but fragile compounds in water stable MOFs. However, only few ambient conditions routes to produce metal(IV) based MOFs have been reported and most of them suffer from a very low yield and/or multiple steps that preclude their use for most applications. We report here a new versatile one-step synthesis of a series of highly porous M 6 oxoclusters based MOFs (M= Zr, Hf, Ce) at room temperature, including 8 or 12-connected micro/mesoporous solids with different functionalized organic ligands. The resulting compounds show varying degrees of defectivity, particularly for 12-connected phases, while maintaining the chemical stability of the parent MOFs. We propose first insights for the efficient MOF preparation based on In-situ kinetics observations. Remarkably, the synthetic versatility not only allows an efficient room temperature synthesis with a high space-time yield, but also gives possibility to tune the particle size, which therefore paves the way for their practical use.