Enantiomer Recognition by the Difference in Adsorption Rates on the Surfaces of Chiral Crystals.

Autor: Belonogov E; Department of Analytical Chemistry, Ufa University of Science and Technology, Ufa, Russia., Ermolaeva E; Department of Analytical Chemistry, Ufa University of Science and Technology, Ufa, Russia., Zinoviev I; Department of Analytical Chemistry, Ufa University of Science and Technology, Ufa, Russia., Zhang ZH; Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou, Jiangsu, China., Guskov V; Department of Analytical Chemistry, Ufa University of Science and Technology, Ufa, Russia.
Jazyk: angličtina
Zdroj: Chirality [Chirality] 2024 Sep; Vol. 36 (9), pp. e23717.
DOI: 10.1002/chir.23717
Abstrakt: The chirality of biopolymers remains one of the mysteries of Life. For such objects, the phenomenon of supramolecular chirality (SMC) is vital. Enantiomers can be recognized by the adsorption on surfaces with SMC. However, the mechanisms of such chiral recognition are still unknown. In this work, the adsorption kinetics of menthol test enantiomers on the surfaces of γ-glycine and NiSO 4 •6H 2 O chiral crystals was studied. It was found that the difference in adsorption was observed in nonequilibrium state more often than in equilibrium. If the enantioselectivity in equilibrium state was observed, the enantioselectivity coefficient α at nonequilibrium conditions was higher. The maximum α in nonequilibrium state was 2.44 for γ-glycine crystals and 2.12 for NiSO 4 •6H 2 O crystals. Even if no differences in adsorption were observed under adsorption-desorption equilibrium conditions, a significant enantioselectivity at nonequilibrium conditions was found. This has proved the possibility of chiral recognition on surfaces with SMC by the differences in adsorption rates. Such novel chiral recognition mechanism can provide enhanced enantioselectivity in adsorption, catalysis, chromatographic separation, and chemical sensing.
(© 2024 Wiley Periodicals LLC.)
Databáze: MEDLINE
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