Preferential Solvation of an Asymmetric Redox Molecule
نویسندگان
چکیده
The fundamental correlations between solubility and solvation structure for the electrolyte system comprising N-(ferrocenylmethyl)-N,N-dimethyl-N-ethylammonium bistrifluoromethylsulfonimide (Fc1N112-TFSI) dissolved in a ternary carbonate solvent mixture is analyzed using combined NMR relaxation and computational methods. Probing the evolution of the solvent−solvent, ion−solvent and ion−ion interactions with an increase in solute concentration provides a molecular level understanding of the solubility limit of the Fc1N112TFSI system. An increase in solute concentration leads to pronounced Fc1N112-TFSI contact-ion pair formation by diminishing solvent−solvent and ion−solvent type interactions. At the solubility limit, the precipitation of solute is initiated through agglomeration of contaction pairs due to overlapping solvation shells.
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