The MOF samples were prepared in triplicate (except for MOF-5). All compounds were weighed on an analytical balance (Mettler Toledo XS105), so that the molar amount could be computed without having to take into account densities and density changes. Subsequently, the MAF-6 and ZIF-8 samples were dissolved in a D2O + D2SO4 solution containing the internal standard, maleic acid (Table ). The presence of sulfuric acid disrupts the interaction between the metal nodes and the linker molecules. Clear solutions were obtained through shaking, vortex and sonication. The same analysis protocol was followed for the calibration curve. The final calculated ratio was corrected using the calibration curve. For MOF-5, solutions were made in DMSO-d6 and we had to add approximately 2.8 g DMSO-d6 and 0.7 g D2SO4 to obtain a clear solution. The TGA curve of MAF-6 (Figure ) initially slopes down slowly, from 100 % of the initial mass at room temperature to 97 % at 350 °C, before the onset of the loss of linker around 380 °C. Around 590 °C the curve levels indicating that only ZnO remains. The mass of this residue is 31 % of the total sample mass. For the qNMR analysis, MAF-6 was digested in deuterated sulfuric acid (D2SO4) and dissolved in D2O. A clear solution was obtained, indicating all its constituents are brought in solution. Three different samples were prepared as well as a five point calibration series of increasing mass of EtImH in the same stock solution, containing maleic acid as internal calibration standard (Table ). The 1 H NMR spectrum in Figure shows a clear separation of the signals of interest, allowing for accurate integration. The measured ratio of the integration areas of the calibration samples and the maleic acid signal was plotted versus the expected ratio for all three signals of interest: the imidazole aromatic protons and the quartet and triplet signals associated with the ethyl substituent (Figure ). Regression results are presented in Table .