期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 1, 页码 210-214出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201307855
关键词
amino acids; chirality; circular dichroism; origins of life; photochemistry
资金
- French National Centre of Space Research Fellowship (CNES)
- International Max Planck Research School at MPS for a PhD scholarship
- Agence Nationale de la Recherche [ANR-07-BLAN-0293, ANR-12-IS07-0006]
- I3 Integrated Activity on Synchrotron and Free Electron Laser Science (IA-SFS) [RII3-CT-2004506008]
- European Community [226716]
- Agence Nationale de la Recherche (ANR) [ANR-07-BLAN-0293] Funding Source: Agence Nationale de la Recherche (ANR)
Circularly polarized light (CPL) is known to be a true chiral entity capable of generating absolute molecular asymmetry. However, the degree of inducible optical activity depends on the of the incident CPL. Exposure of amorphous films of rac-alanine to tunable CPL led to enantiomeric excesses (ee) which not only follow the helicity but also the energy of driving electromagnetic radiation. Postirradiation analyses using enantioselective multidimensional GC revealed energy-controlled eevalues of up to 4.2%, which correlate with theoretical predictions based on newly recorded anisotropy spectra g(). The tunability of asymmetric photochemical induction implies that both magnitude and sign can be fully controlled by CPL. Such stereocontrol provides novel insights into the wavelength and polarization dependence of asymmetric photochemical reactions and are highly relevant for absolute asymmetric molecular synthesis and for understanding the origins of homochirality in living matter.
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