期刊
NATURE COMMUNICATIONS
卷 9, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-07609-9
关键词
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资金
- European Research Council (ERC) under the European Unions Horizon 2020 research and innovation program [682978 - EXCITERS, 654148 - LASERLAB-EUROPE]
- French National Research Agency [ANR-14-CE32-0014 MISFITS]
- Region Nouvelle Aquitaine through RECHIRAM
- EPSRC [EP/M001644/1]
- Royal Society's Paul Instrument Fund [PI170043]
- EPSRC [1786238] Funding Source: UKRI
The fast and accurate analysis of chiral chemical mixtures is crucial for many applications but remains challenging. Here we use elliptically-polarized femtosecond laser pulses at high repetition rates to photoionize chiral molecules. The 3D photoelectron angular distribution produced provides molecular fingerprints, showing a strong forward-backward asymmetry which depends sensitively on the molecular structure and degree of ellipticity. Continuously scanning the laser ellipticity and analyzing the evolution of the rich, multi-dimensional molecular signatures allows us to observe real-time changes in the chemical and chiral content present with unprecedented speed and accuracy. We measure the enantiomeric excess of a compound with an accuracy of 0.4% in 10 min acquisition time, and follow the evolution of a mixture with an accuracy of 5% with a temporal resolution of 3 s. This method is even able to distinguish isomers, which cannot be easily distinguished by mass-spectrometry.
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