It is proposed to study first the possibility of certain aza-ligands to coordinate metal atoms. With tridentate pyrazolic ligands, transition metal complexes may exhibit catalytic behavior. The ligands have the ability to link the metal ions via the Nsp3 central and both Nsp2 of pyrazole rings; chelating substituents (R1,R2) help to control the metal ions electronic density.

In the development of conducting materials for molecular electronics, many bis-tridentate ligands have been prepared. Their use as chelating agents for the preparation of new vanadium(IV) bis-(tridentate ligands) complexes could provide a new family of materials with original properties.

These bis(tridentate) ligands should form bimetallic or even polymetallic systems with a variety of metal ions, among which paramagnetic ones such as Ru(III) and V(IV). In the case of vanadium, EPR can be useful to determine the ground state delocalization and help understand the nature of the metal-ligand interaction. The final goal is to prepare polymetallic chains exhibiting conductivity and magnetic properties.