Coordination compounds of organosulfur ligands as precursors of nanostructured materials

Résumé

This work presents the synthesis and characterization of a series of coordination compounds based on metal(II)-organosulfur complexes as precursors of zero- and three-dimensional nanomaterials.On the one hand, thiocarboxylato ligands have been used for the preparation of metal(II) sulfide nanoparticles both in pure form and as homogeneous dispersion within a carbonaceous matrix. Dry thermolysis, the synthetic method chosen to achieve this goal, is a simple, controllable and economical route that allows the scaling of these materials, a requirement that the industrial sector demands.Moreover, 3D nanoporous structures have been obtained by gelation of coordination polymers based on dithioxamidato ligand. The entrapped solvent can be extracted from the gels through a supercritical treatment, consolidating the structure in the form of aerogels: ultralight mesoporous solids in which more than 80% of their volume is made up of air. Throughout the text the reader will have the opportunity to discover the surprising physicochemical properties exhibited by this emerging class of metal-organic materials.