Intermolecular dynamics and paramagnetic properties of Tm-Na heterometallic complex with macrocyclic ligand by 23Na dynamic NMR

Abstract

The temperature dependence of lanthanide-induced shifts (LIS) and chemical exchange rate constants are studied. The analysis of chemical exchange rate constants was carried out using the method of analysis of the bandshape taking into account the temperature change in the LIS. The value of Gibbs free energy for the activation of intermolecular dynamics is ΔG≠(298 K) = 55 ± 2 kJ/mol. Method of analysis of the bandshape taking into account the temperature change in the paramagnetic lanthanide-induced shifts used for estimation the activation energy of intermolecular dynamics ΔG≠(298 K) = 55 ± 2 kJ/mol.