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Article Dans Une Revue Nature Communications Année : 2023

Induced photoelectron circular dichroism onto an achiral chromophore

Résumé

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.
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Dates et versions

hal-04239788 , version 1 (12-10-2023)

Identifiants

Citer

Etienne Rouquet, Madhusree Roy Chowdhury, Gustavo A Garcia, Laurent Nahon, Jennifer Dupont, et al.. Induced photoelectron circular dichroism onto an achiral chromophore. Nature Communications, 2023, 14 (1), pp.6290. ⟨10.1038/s41467-023-42002-1⟩. ⟨hal-04239788⟩
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