Transfer and Amplification of Chirality Within the “Ring of Fire” Observed in Resonance Raman Optical Activity Experiments

0508865 - ÚOCHB 2020 RIV DE eng J - Journal Article
Li, G. - Kessler, Jiří - Cheramy, J. - Wu, Tao - Poopari, M. R. - Bouř, Petr - Xu, Y.
Transfer and Amplification of Chirality Within the “Ring of Fire” Observed in Resonance Raman Optical Activity Experiments.
Angewandte Chemie - International Edition. Roč. 58, č. 46 (2019), s. 16495-16498. ISSN 1433-7851. E-ISSN 1521-3773
R&D Projects: GA ČR(CZ) GA18-05770S; GA MŠMT(CZ) LTC17012; GA MŠMT(CZ) EF16_019/0000729
Institutional support: RVO:61388963
Keywords : chirality transfer * light scattering * nickel complexes * quantum plasmons * resonance Raman optical activity
OECD category: Physical chemistry
Impact factor: 12.959, year: 2019
Method of publishing: Limited access
https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201909603

We report extremely strong chirality transfer from a chiral nickel complex to solvent molecules detected as Raman optical activity (ROA). Electronic energies of the complex were in resonance with the excitation‐laser light. The phenomenon was observed for a wide range of achiral and chiral solvents. For chiral 2‐butanol, the induced ROA was even stronger than the natural one. The observations were related to so‐called quantum (molecular) plasmons that enable a strong chiral Rayleigh scattering of the resonating complex. According to a model presented here, the maximal induced ROA intensity occurs at a certain distance from the solute, in a three‐dimensional “ring of fire”, even after rotational averaging. Most experimental ROA signs and relative intensities could be reproduced. The effect might significantly increase the potential of ROA spectroscopy in bioimaging and sensitive detection of chiral molecules.
Permanent Link: http://hdl.handle.net/11104/0299663