“…This lack of understanding can be ascribed to the complexity of the chemistry taking place during crystallization, where DMF can also play a major role in the process of SBU formation, as already demonstrated for other MOFs [147,171,172], by virtue of its coordinative character. As a matter of fact, several zirconium complexes featuring DMF as a ligand are known to exist [173][174][175][176]. A contribution might come from the mechanistic studies previously carried out on molecular clusters [141,177,178], although these are usually synthesized in rather different conditions and are soluble in many solvents, which makes them much easier to be characterized insitu.…”