Induced photoelectron circular dichroism onto an achiral chromophore

Etienne Rouquet, Madhusree Roy Chowdhury, Gustavo A. Garcia, Laurent Nahon (), Jennifer Dupont, Valéria Lepère, Katia Le Barbu-Debus and Anne Zehnacker ()
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Etienne Rouquet: Synchrotron SOLEIL, L’Orme des Merisiers, Départementale 128
Madhusree Roy Chowdhury: Synchrotron SOLEIL, L’Orme des Merisiers, Départementale 128
Gustavo A. Garcia: Synchrotron SOLEIL, L’Orme des Merisiers, Départementale 128
Laurent Nahon: Synchrotron SOLEIL, L’Orme des Merisiers, Départementale 128
Jennifer Dupont: Université Paris-Saclay
Valéria Lepère: Université Paris-Saclay
Katia Le Barbu-Debus: Université Paris-Saclay
Anne Zehnacker: Université Paris-Saclay

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract An achiral chromophore can acquire a chiral spectroscopic signature when interacting with a chiral environment. This so-called induced chirality is documented in electronic or vibrational circular dichroism, which arises from the coupling between electric and magnetic transition dipoles. Here, we demonstrate that a chiroptical response is also induced within the electric dipole approximation by observing the asymmetric scattering of a photoelectron ejected from an achiral chromophore in interaction with a chiral host. In a phenol–methyloxirane complex, removing an electron from an achiral aromatic π orbital localised on the phenol moiety results in an intense and opposite photoelectron circular dichroism (PECD) for the two enantiomeric complexes with (R) and (S) methyloxirane, evidencing the long-range effect (~5 Å) of the scattering chiral potential. This induced chirality has important structural and analytical implications, discussed here in the context of growing interest in laser-based PECD, for in situ, real time enantiomer determination.

Date: 2023
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DOI: 10.1038/s41467-023-42002-1

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