Open AccessRaman optical activity of chiral trans-2, 3-epoxybutane molecule
Author(s) -
赵彦牧,
王培杰,
方炎,
吴国祯
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.240201
Subject(s) - raman spectroscopy , raman optical activity , polarizability , dipole , chirality (physics) , molecule , excited state , molecular physics , bond dipole moment , transition dipole moment , physics , materials science , atomic physics , nuclear magnetic resonance , optics , symmetry breaking , quantum mechanics , spontaneous symmetry breaking , nambu–jona lasinio model
In this article, Raman bond polarizability of trans-2,3-epoxybutane is derived from its Raman intensity, and the charge distribution of its Raman excited virtual state is obtained. The differential bond polarizability is also obtained from its Raman optical activity (ROA) intensity. The Raman chirality is explained via the coupling between the dipole moment induced by the C-H bond around the chiral center and the magnetic dipole moment which is caused by the electronic current generated in the Raman process. Further analysis shows that the differential bond polarizabilities on the two opposite sides of the C-H bond around the chiral center are of opposite sign. This demonstrates the local asymmetry of this chiral molecule. The symmetric and antisymmetric coordinates are also analyzed, and their results are explained via the irreducible representations of C2 group.