Papers › Climbing the rotational ladder to chirality
Climbing the rotational ladder to chirality
Alec Owens, Andrey Yachmenev, Sergei N. Yurchenko, Jochen Küpper
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Molecular chirality is conventionally understood as space-inversion-symmetry breaking in the equilibrium structure of molecules. Less well known is that achiral molecules can be made chiral through extreme rotational excitation. Here, we theoretically demonstrate a clear strategy for generating rotationally-induced chirality (RIC): An optical centrifuge rotationally excites the phosphine molecule (PH₃) into chiral cluster states that correspond to clockwise (R-enantiomer) or anticlockwise (L-enantiomer) rotation about axes almost coinciding with single P-H bonds. Application of a strong dc electric field during the centrifuge pulse favors the production of one rotating enantiomeric form over the other, creating dynamically chiral molecules with permanently oriented rotational angular momentum. This essential step toward characterizing RIC promises a fresh perspective on chirality as a fundamental aspect of nature.
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