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

0533908 - ÚOCHB 2021 RIV DE eng J - Článek v odborném periodiku
Wu, Tao - Li, G. - Kapitán, J. - Kessler, Jiří - Xu, Y. - Bouř, Petr
Two Spectroscopies in One: Interference of Circular Dichroism and Raman Optical Activity.
Angewandte Chemie - International Edition. Roč. 59, č. 49 (2020), s. 21895-21898. ISSN 1433-7851. E-ISSN 1521-3773
Grant CEP: GA ČR(CZ) GA18-05770S; GA ČR(CZ) GA20-10144S; GA ČR(CZ) GJ19-05974Y; GA MŠMT(CZ) LTC17012; GA MŠMT(CZ) EF16_019/0000729
Institucionální podpora: RVO:61388963
Klíčová slova: chirality transfer * electronic circular dichroism * magnetic circular dichroism * polarized Raman scattering * resonance Raman optical activity
Obor OECD: Physical chemistry
Impakt faktor: 15.336, rok: 2020
Způsob publikování: Open access
https://doi.org/10.1002/anie.202011146

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 solvent vibrational bands is a principal molecular property participating in the event. The insight and the possibility to predict the chirality transfer promise future applications in spectroscopy, chemical analysis and polarized imaging.
Trvalý link: http://hdl.handle.net/11104/0312436