The overall goal of f-Char is to improve the understanding of the coordination chemistry of actinide and lanthanide ions with so-called soft donor ligands (here: primarily ligands coordinating via nitrogen atoms). In particular, subtle differences in the interaction of such ligands with the chemically similar actinide or lanthanide ions will be further characterised and quantified. Another essential aspect of the project is the training and education of young scientists in the field of nuclear safety research and nuclear chemistry in general and in actinide chemistry topics in particular. Thus, the project makes an important contribution to the establishment, further development and maintenance of scientific-technical competence in nuclear safety research.