NMR spectroscopy of paramagnetic metal complexes: current state

NMR spectroscopy of paramagnetic metal complexes was long considered a challenging area of research due to signal broadening and difficulties in spectral interpretation. However, modern theoretical and experimental developments have transformed this physicochemical method into an indispensable tool, particularly for the design of functional molecular materials. This review offers the first comprehensive view of paramagnetic NMR spectroscopy, combining a detailed analysis of the physical foundations and experimental techniques with a summary of modern theories and approaches. Particular attention is given to the method′s potential for establishing the structure, electronic structure, and magnetic properties of complexes, determining the parameters of magnetic interactions critical for the creation of single-molecule magnets, spin switches, and other precursors to future functional materials. The synergistic effect of combining NMR spectroscopy with magnetometry and EPR is emphasized, allowing one to overcome the problem of overparameterization and obtain reliable data on the electronic structure of the complex. <br> The bibliography includes 157 references.