Two Spectroscopies in One: Interference of Circular Dichroism and Raman Optical Activity.

ABSTRACT: Previously, we and other laboratories have reported an unusual and strong Raman optical activity (ROA) induced in solvents by chiral dyes. Various theories of the phenomenon appeared, but they were not capable of explaining fully the observed ROA band signs and intensities. In this work, an analysis based both on the light scattering theory and dedicated experiments provides a more complete understanding. For example, double-cell magnetic circular dichroism and magnetic ROA experiments with copper-porphyrin complex show that the induced chirality is observed without any contact of the solvents with the complex. The results thus indicate that a combination of electronic circular dichroism (ECD) with the polarized Raman scattering is responsible for the effect. The degree of circularity of s

SUBMITTER: Wu T 

PROVIDER: S-EPMC7894312 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature