Caratterizzazione del centro metallico di MOF-5 metallorganic frameworks con XAS/XES

X-Ray Absorption Spectroscopy (XAS) and X-Ray Emission Spectroscopy (XES) were used in order to characterized the chemical and local structural environment of Metal-Organic Frameworks (MOFs), highly porous crystalline compounds. In particular, the analyzed sample were Co2Cln(BTDD)n=2,4 and Post-Synthetic Ion Metathesis (PSIM) metal substituted M-MOF-5 (M = Fe, Nb, Mn). Those materials have possible uses in gas storage and heterogeneous catalysis. The employed technique are element selective probes of local and electronic structure. Those features perfectly suits the characteristics of studied compounds. The founded results highlight the formation of an high degree of disorder in the second coordination shell in studied materials. In particular, for Co2Cl4(BTDD) disorder is found after thermal treatment and for M-MOF-5 (M = Fe, Nb, Mn) a comparison between results obtained in a previous study empathize this defect.