Effect of Modulation and Functionalization of UiO-66 Type MOFs on Their Surface Thermodynamic Properties and Lewis Acid–Base Behavior

In this study, we investigated the surface thermodynamic properties of four MOF structures UiO-66 series, by employing seven molecular models, a thermal model, and three other methods using inverse gas chromatography (IGC) technique at infinite dilution. We first determined effect modulation an acid (e.g., formic acetic acid) on hand, studied functionalization organic linker amine group (NH2) their dispersive component energy Lewis acid–base properties. found that all MOFs presented amphoteric character with strong acidity whose acidity/basicity ratio is greater than 1 models in IGC. Moreover, introduction modulator such as or synthesis these increased number structural defects therefore MOFs. Similarly, NH2 leads to increase basicity constant functionalized while remaining smaller constant. addition, use acids modulators groups functional resulted Finally, comparing results obtained different based increasing order each MOF, it was clear model more exact precise values others. Our findings pave way for design development new catalysts structures.