Premium
Enantiomeric Discrimination by Surface‐Enhanced Raman Scattering–Chiral Anisotropy of Chiral Nanostructured Gold Films
Author(s) -
Liu Zexi,
Ai Jing,
Kumar Prashant,
You Enming,
Zhou Xiong,
Liu Xi,
Tian Zhongqun,
Bouř Petr,
Duan Yingying,
Han Lu,
Kotov Nicholas A.,
Ding Songyuan,
Che Shunai
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202006486
Subject(s) - raman scattering , enantiomer , raman spectroscopy , chirality (physics) , anisotropy , chemistry , scattering , raman optical activity , materials science , chromophore , analytical chemistry (journal) , molecule , photochemistry , optics , organic chemistry , chiral symmetry breaking , physics , quantum mechanics , nambu–jona lasinio model , quark
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.