通过表面增强拉曼散射 - 手性纳米结构金膜的手性各向异性进行对映体鉴别
Enantiomeric Discrimination by Surface-Enhanced Raman Scattering-Chiral Anisotropy of Chiral Nanostructured Gold Films.
作者信息
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
机构信息
School of Chemical Science and Engineering, Tongji University, 1239 Siping Road, Shanghai, 200092, P. R. China.
Department of Chemical Engineering and Biointerfaces Institute, University of Michigan, Ann Arbor, MI, 48019, USA.
出版信息
Angew Chem Int Ed Engl. 2020 Aug 24;59(35):15226-15231. doi: 10.1002/anie.202006486. Epub 2020 Jun 21.
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.
报道了一种表面增强拉曼散射-手性各向异性（SERS-ChA）效应，该效应结合了配备在常规拉曼散射光谱仪中的手性纳米结构金膜（CNAF）上的手性识别和表面拉曼散射增强。CNAF对特定对映体提供了显著更高的拉曼散射增强因子（EF），并且SERS强度与对映体过量（ee）值成正比。除了具有中介体的分子外，所有测试的对映体均表现出高SERS-ChA不对称因子（g），无论极性、尺寸、发色团、浓度和ee如何，其范围在1.34至1.99之间。该效应可能归因于与对映体相关的感应电偶极和磁偶极与CNAF的手性等离子体模式之间的选择性共振耦合。
Zotero 插件