Premium
Raman optical activity of enantiomorphic single crystals
Author(s) -
Lindner M.,
Schrader B.,
Hecht L.
Publication year - 1995
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250260839
Subject(s) - raman spectroscopy , raman optical activity , phonon , degenerate energy levels , dipole , raman scattering , molecular physics , polarization (electrochemistry) , transverse plane , infrared , condensed matter physics , materials science , chemistry , optics , physics , organic chemistry , structural engineering , quantum mechanics , engineering
Conventional Raman and incident circular polarization Raman optical activity (ROA) spectra are presented for the lattice vibrations of enantiomorphic pairs of optically active cubic crystals NaBrO 3 and NaCIO 3 in depolarized right‐angle scattering (65‐145 cm −1 ) and unpolarized backscattering (55‐200 cm −1 ). Since enantiomorphic cubic crystals are also piezoelectric owing to the lack of a centre of inversion, the degeneracy of their triply degenerate polar (infrared and Raman active) F phonons is partially lifted because of long‐range dipole‐dipole interactions. Therefore, non‐degenerate longitudinal and doubly degenerate transverse optical phonons can be separately observed in the ROA spectra.