engleski

Ni-MOF-74 and its different phases ; structural, magnetization and ESR studies

The metal-organic frameworks (MOFs) are the subject of intensive research due to their promising applications in gas separation, ion exchange, sensors and catalysts.[1] However, exploring the magnetism of MOFs is a rather difficult task due to complexity of magnetic interactions.[2] Here we present a multi-frequency high-field electron spin resonance (HF-ESR) study, as well as X-band ESR and magnetization research, of magnetic properties of Ni-MOF-74 (Ni-MOF). Furthermore, we compare these results with those of a non-porous 1:1 (Ni:ligand) intermediate complex (Ni-INT) detected and isolated during the synthesis of the Ni-MOF material. Beside this, we investigate the properties of Ni-MOF when the pores or the coordination sphere of the metal sites were changed by removing the labile coordinated ligands (Ni-MOF-desolvated) and also the properties of the amorphous Ni-MOF with collapsed MOF architecture and non-existence of long-range ordering (Ni-MOF-amorph).

MOF ; ESR spectroscopy

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