The last two decades have received a huge expansion in the field of crystal polymeric porous materials also known as Metal-Organic Frameworks (MOF). These versatile materials dominate mainly due to their surface area and pore volume with various pore topologies, accessible cages and their potential applications in different fields, such as heterogenous catalysis [1], gas storage and gas separation materials [2] or drug delivery systems. Despite their great advantages, these materials also have certain disadvantages. From an industrial point of view, the main disadvantage is the hydrolytic lability, which is compensated by drying the used reactants, gases or solvents, which increases the production costs. Several methods are known to increase the hydrolytic resistance of MOF materials, but they often lead to pore occupancy and potentially decrease the sorption capacity of gases [3].

In this work we focus on increasing the hydrolytic resistance of MOF-type materials using a synthetic method that includes a completely new synthesis of MOF materials from a series of new, hydrophobic fluorinated ligands. Their hydrophobic effect is ensured by the aromatic skeleton of the ligand and the fluorine atoms bound to it. Two series of MOF complexes with non-fluorinated ligand as a reference material and fluorinated derivative were prepared. The first ligand represents biphenyl-4,4'-dicarboxylic acid (H₂BPDC), with which MOF complexes have been successfully prepared using Zn²⁺, Ba²⁺, Ce³⁺, Fe³⁺, Cr³⁺, La³⁺, Yb³⁺ and Zr⁴⁺ salts. The second ligand represents 3,3',5,5'-tetrafluorobiphenyl-4,4'-dicarboxylic acid (H₂4FBPDC), with which MOF complexes have been prepared using Ce³⁺ and La³⁺ salts and all prepared MOF complexes were subjected to IR, TG and SXRD measurements confirming their composition. Experimental results confirm the increased stability of fluorinated derivatives compared to reference complexes.