Deep Eutectic Solvents (DESs) offer advantages similar to ionic liquid (IL) ones, with easier and more sustainable synthesis; moreover, bio-based DESs often include chiral components, surprisingly underexploited. A proof of concept is now offered of the impressive potential of enantiopure chiral DESs as chiral media for enantioselective electroanalysis. Three chiral DESs, consisting of a molecular salt with bio-based chiral cation [NopolMIm]+ combined with three natural and/or low-cost partners (levulinic acid, glycerol and urea), are introduced and investigated as chiral voltammetry media. Significant potential differences are observed for the enantiomers of a model chiral probe, with a dramatic tuning depending on the achiral DES component, reaching an impressive ~0.5 V in the levulinic acid case (while less efficient appears [NopolMIm]+ as chiral additive in IL). With the same medium good enantiodiscrimination is also observed for aminoacid tryptophan, a quite different probe and of applicative interest. These findings can be considered as a remarkable step further in chiral electroanalysis as well as in the development of task-specific enantioselective media.

Natural-based chiral task-specific deep eutectic solvents: A novel, effective tool for enantiodiscrimination in electroanalysis

Mezzetta A.
Primo
;
Guazzelli L.
Penultimo
;
2021-01-01

Abstract

Deep Eutectic Solvents (DESs) offer advantages similar to ionic liquid (IL) ones, with easier and more sustainable synthesis; moreover, bio-based DESs often include chiral components, surprisingly underexploited. A proof of concept is now offered of the impressive potential of enantiopure chiral DESs as chiral media for enantioselective electroanalysis. Three chiral DESs, consisting of a molecular salt with bio-based chiral cation [NopolMIm]+ combined with three natural and/or low-cost partners (levulinic acid, glycerol and urea), are introduced and investigated as chiral voltammetry media. Significant potential differences are observed for the enantiomers of a model chiral probe, with a dramatic tuning depending on the achiral DES component, reaching an impressive ~0.5 V in the levulinic acid case (while less efficient appears [NopolMIm]+ as chiral additive in IL). With the same medium good enantiodiscrimination is also observed for aminoacid tryptophan, a quite different probe and of applicative interest. These findings can be considered as a remarkable step further in chiral electroanalysis as well as in the development of task-specific enantioselective media.
2021
Arnaboldi, S.; Mezzetta, A.; Grecchi, S.; Longhi, M.; Emanuele, E.; Rizzo, S.; Arduini, F.; Micheli, L.; Guazzelli, L.; Mussini, P. R.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/1103208
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