نوع مقاله : مقاله پژوهشی
چکیده تصویری
موضوعات
عنوان مقاله English
نویسندگان English
In this study, the effect of solvent type, salt of metal core, and heat-treatment on the efficiency, coordination strength, and organic content of magnesium-based metal-organic frameworks was investigated by elemental analysis and Fourier transform infrared spectroscopy. Different metal-organic frameworks were synthesized using different sources of metal core and solvents. The formation of MOF was confirmed by FT-IR, EDX, UV-Vis., and SEM. The organic content of the samples was determined by elemental analysis, revealed that the MOF organic content is dependent on the solvent type and heat-treatment, but is independent of the metal source. The coordination strength of Mg-O was investigated with FT-IR, showed that the solvent type and metal salt significantly affect the efficiency and strength of Mg-O coordination. Metal-core salts and solvents that cannot play a competitive role in the coordination, increase the efficiency. The coordination bonding in the aprotic solvent was evaluated to be stronger than the protic solvent due to its role in stabilizing the mediators of the coordination process. The heat-treatment reduces the organic content of the MOF through the removal of the coordinated solvent and also leads to some degree of ligand re-dimerization. Overall, the results of the present study can open a new gate in the engineering of metal-organic frameworks.
کلیدواژهها English