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Control of π‐Electron Rotation in Chiral Aromatic Molecules by Nonhelical Laser Pulses
Author(s) -
Kanno Manabu,
Kono Hirohiko,
Fujimura Yuichi
Publication year - 2006
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200602479
Subject(s) - degenerate energy levels , ring (chemistry) , electron , excited state , laser , molecule , enantiomer , angular momentum , rotation (mathematics) , chirality (physics) , atomic physics , current (fluid) , physics , chemistry , stereochemistry , optics , quantum mechanics , mathematics , organic chemistry , geometry , nambu–jona lasinio model , chiral symmetry breaking , thermodynamics , quark
Turning on the ring current : π Electrons in a chiral aromatic molecule, such as dichloro(3,6)pyrazinophanes (see scheme), can be rotated along the aromatic ring by linearly polarized laser pulses. Selective generation of an (approximate) angular momentum eigenstate consisting of optically allowed, quasi‐degenerate π‐electronic excited states is responsible for the rotation. The direction of the photoinduced ring current is controllable in each enantiomer.