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Enantiomeric Discrimination by Surface‐Enhanced Raman Scattering–Chiral Anisotropy of Chiral Nanostructured Gold Films

Year: 2020
Type: article
Abstract: 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 and ee. 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.
DOI: 10.1002/anie.202006486
Authors: Zexi Liu, Jing Ai, Prashant Kumar, Enming You, Xiong Zhou, Xi Liu, Zhongqun Tian, Petr Bouř, Yingying Duan, Lu Han, Nicholas A. Kotov, Songyuan Ding, Shunai Che
Institutions: Tongji University, University of Michigan, Xiamen University, Czech Academy of Sciences, Czech Academy of Sciences, Institute of Organic Chemistry and Biochemistry, Shanghai Jiao Tong University, State Key Laboratory of Metal Matrix Composites
Language: English
Open Access status: green
OpenAlex ID: W3027390436
FWCI: 11.19
Cites: 32
Cited by: 156
Related to: 10