HOMO AND HETEROMETALLIC SOLUBLE COORDINATION POLYMERS CONTAINING AN OXALATE LIGAND AND METHOD FOR OBTAINING SPINELS FROM SAME

摘要

The invention relates to homo and heterometallic soluble coordination polymers containing an oxalate ligand and to a method for obtaining spinels from same. The homo and heterometallic coordination polymers, which contain at least one oxalate ligand, are characterised in that they also contain at least one organic molecule capable of stabilising expanded metal complex structures through the formation of supramolecular interactions such that the polymer is substantially soluble in water and insoluble in organic solvents. Said polymers, when in the solid state, can generate spinel-type metal oxides or other mixed oxides following a thermal oxidation treatment including steps comprising: the preparation of an alcoholic solution of a metal complex containing at least one oxalate ligand and a metal salt, the precipitation of the metal complex and the metal salt with a cryptand-type molecule through the formation of a coordination polymer that is soluble in water and insoluble in organic solvents, the separation of the precipitate obtained in the previous step, and the heating of same in an oxidant atmosphere to a temperature of at least 350ºC until the spinel or mixed oxide has formed.