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Probing Spin Crossover in a Solution by Paramagnetic NMR Spectroscopy.

Alexander A PavlovGleb L DenisovMikhail A KiskinYulia V NelyubinaValentin V Novikov
Published in: Inorganic chemistry (2017)
Spin transitions in spin-crossover compounds are now routinely studied in the solid state by magnetometry; however, only a few methods exist for studies in solution. The currently used Evans method, which relies on NMR spectroscopy to measure the magnetic susceptibility, requires the availability of a very pure sample of the paramagnetic compound and its exact concentration. To overcome these limitations, we propose an alternative NMR-based technique for evaluating spin-state populations by only using the chemical shifts of a spin-crossover compound; those can be routinely obtained for a solution that contains unknown impurities and paramagnetic admixtures or is contaminated otherwise.
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