Enantiomeric Discrimination by Surface-Enhanced Raman Scattering-Chiral Anisotropy of Chiral Nanostructured Gold Films.,Angewandte Chemie International Edition

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Enantiomeric Discrimination by Surface-Enhanced Raman Scattering-Chiral Anisotropy of Chiral Nanostructured Gold Films.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-05-18 , DOI: 10.1002/anie.202006486
Zexi Liu ₁ , Jing Ai ₁ , Prashant Kumar ₂ , Enming You ₃ , Xiong Zhou ₄ , Xi Liu ₄ , Zhongqun Tian ₃ , Petr Bouř ₅ , Yingying Duan ₁ , Lu Han ₁ , Nicholas A Kotov ₂ , Songyuan Ding ₃ , Shunai Che _{1,

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Affiliation

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.

中文翻译：

通过手性纳米结构金膜的表面增强拉曼散射-手性各向异性对映体鉴别。

据报道，表面拉曼散射-手性各向异性（SERS-ChA）效应结合了常规拉曼散射光谱仪配备的手性纳米结构金膜（CNAF）的手性识别能力和表面拉曼散射增强能力。对于特定的对映体，CNAF提供了显着更高的拉曼散射增强因子（EFs），并且SERS强度与对映体过量（ee）值成正比。除具有介晶种的分子外，所有测试的对映异构体均显示出高SERS-ChA不对称因子（g），介于1.34和1.99之间，与极性，大小，生色团，浓度和ee无关。该效应可能归因于与对映异构体相关的感应电和磁偶极与CNAF的手性等离激元模式之间的选择性共振耦合。

更新日期：2020-05-18

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