ИСТИНА

The title ligand was introduced in synthetic practice in 2000 by the group of Claudio Pettinari [1] and since that time it was extensively used for the preparation of variety of complexes with d-elements and selected lanthanides. Two main type of complexes were obtained for this ligand – neutral tris complexes (1) and anionic tetrakis complexes (2), bearing cation on the outer sphere of complex. In some cases free acids with H3O+ or(H5O5) + cations were isolated. The coordination polyhedron for Ln3+ in tetrakis complexes is represent by virtually perfect square antiprism, and such environment is favorable for manifestation of SMM properties. Unfortunately, known synthetic pathways to these complexes are unreliable and often led to unpredictable result. We have investigated complicated temperature-depended equilibrium between tris and tetakis species in solutions and elaborated direct pathways to both types of complexes. Besides, some interesting aspects of crystal structures and luminescent properties of lanthanide complexes with different composition will be discussed in the report.