The focus of my research is on the fundamental and applied chemistry of technetium. The radioelement 99Tc is an important byproduct of the nuclear industry and 99mTc is the predominant isotope in nuclear medicine. I believe that the study of fundamental chemistry of 99Tc permit to learn more on the chemistry of the transitions transition elements, permit the development of new 99mTc radiopharmaceuticals, and to explore possibilities for 99Tc waste storage forms. In this context, I am particularly interested in the synthesis, characterizations, electronic structures and spectroscopic properties of: technetium solid state compounds (binary halides  and  oxides,  alloys ,  sulfides)  which  can  be used as waste forms, multiple metal-metal bonded complexes and low valents molecular Tc complexes coordinated to ligand of potential interest in medicine applications.