Abstract
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, induced ROA was even stronger than the natural one. The observations were related to quantum (molecular) plasmon enabling a strong chiral Rayleigh scattering on the resonating complex. According to a simple model, maximal induced ROA intensity occurs at a certain distance from the solute, 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.
Citation
ID:
22925
Ref Key:
li2019transferangewandte