VIBRONIC INTENSITY IN CIRCULAR DICHROISM
Loading...
Date
1973
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
Circular dichroism spectra at ambient and cryogenic temperatures reveal inverse temperature dependence of rotational strength in certain d-d transitions of $M(H_{2}O)^{2+}_{6}$ (M = Fe, Ni, Co, Cu) ions doped into enantiomorphic $\alpha-Zn(H_{2}O)_{6}SeO_{4}$ single crystals. Only those transitions which are magneticdipole allowed in the parent octahedral symmetry are found to show this effect. The phenomenon is not observed when the same metal ions are doped into $Mg(H_{2}O)_{6}SO_{3}$ crystals, where the static distortion of the $MO_{6}$ coordination cluster is much farther from octahedral than the selenate lattice. These observations are discussed and interpreted in terms of the theory of vibronic coupling.
Description
Author Institution: Chemical Laboratory, Duke University