期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 35, 页码 15226-15231出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202006486
关键词
chiral anisotropy; chiral nanostructured Au film; chiral response; enantiomeric discrimination; surface-enhanced Raman scattering
资金
- National Natural Science Foundation of China [21931008, 21533002, 21975184, 21922304, 21873072, 21673273, 21872163]
- Science foundation of the Shanghai Municipal Science and Technology Commission [19JC1410300]
- MSMT [LTC17012]
- GAR [18-05770S]
A surface-enhanced Raman scattering-chiral anisotropy (SERS-ChA) effect is reported that combines chiral discrimination and surface Raman scattering enhancement on chiral nanostructured Au films (CNAFs) equipped in the normal Raman scattering Spectrometer. The CNAFs provided remarkably higher enhancement factors of Raman scattering (EFs) for particular enantiomers, and the SERS intensity was proportional to the enantiomeric excesses (ee)values. Except for molecules with mesomeric species, all of the tested enantiomers exhibited high SERS-ChA asymmetry factors (g), ranging between 1.34 and 1.99 regardless of polarities, sizes, chromophores, concentrations andee. The effect might be attributed to selective resonance coupling between the induced electric and magnetic dipoles associated with enantiomers and chiral plasmonic modes of CNAFs.
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