Fluorescent mode XAFS measurements of structure changes of new complex porous compounds in the act of annealing in vacuum

Dehydration process in recently synthesized porous inorganic salts formed by large cluster anions [Re6X8(CN)6]4− (XS, Se) and transition metal cations and containing water molecules has been investigated. Desolvation process of the complex Co(DMF)6[Mo6Br8(NCS)6] containing cluster Mo anions and cations with dimethylformamide molecules has been studied. Co K, Mo K and Re L3 XAFS measurements of these new complicated compounds before and after annealing in vacuum at the temperature up to 250°C were performed. Changes of electronic and spatial structure of these compounds under the heating process have been established and adequate structural models of the amorphous compounds obtained were suggested and discussed.