期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 58, 期 46, 页码 16495-16498出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201909603
关键词
chirality transfer; light scattering; nickel complexes; quantum plasmons; resonance Raman optical activity
资金
- NSERC
- CFI of Canada
- Alberta Enterprise and Advanced Education, the University of Alberta, and GAC
- MSMT of the Czech Republic [18-05770S, LTC17012, LM2015085, LM2015042, CZ.02.1.01/0.0/0.0/16 019/0000729]
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.
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