Can One Measure Resonance Raman Optical Activity?

0545391 - ÚOCHB 2022 RIV DE eng J - Journal Article
Li, G. - Alshalalfeh, M. - Yang, Y. - Cheeseman, J. R. - Bouř, Petr - Xu, Y.
Can One Measure Resonance Raman Optical Activity?
Angewandte Chemie - International Edition. Roč. 60, č. 40 (2021), s. 22004-22009. ISSN 1433-7851. E-ISSN 1521-3773
R&D Projects: GA ČR(CZ) GA20-10144S; GA MŠMT(CZ) EF16_019/0000729
Institutional support: RVO:61388963
Keywords : chiral Raman spectroscopy * circularly polarized Raman * electronic circular dichroism * finite-lifetime approach * resonance Raman optical activity
OECD category: Physical chemistry
Impact factor: 16.823, year: 2021
Method of publishing: Limited access
https://doi.org/10.1002/anie.202109345

Resonance Raman optical activity (RROA) is commonly measured as the difference in intensity of Raman scattered right and left circularly polarized light, IR−IL, when a randomly polarized light is in resonance with a chiral molecule. Strong and sometimes mono-signate experimental RROA spectra of several chiral solutes were reported previously, although their signs and relative intensities could not be reproduced theoretically. By examining multiple light-matter interaction events which can occur simultaneously under resonance, we show that a new form of chiral Raman spectroscopy, eCP-Raman, a combination of electronic circular dichroism and circularly polarized Raman, prevails. By incorporating the finite-lifetime approach for resonance, the experimental patterns of the model chiral solutes are captured theoretically by eCP-Raman, without any RROA contribution. The results open opportunity for applications of eCP-Raman spectroscopy and for extracting true RROA experimentally.
Permanent Link: http://hdl.handle.net/11104/0322091