Journal
CHEMPHOTOCHEM
Volume 3, Issue 6, Pages 347-355Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cptc.201900068
Keywords
azobenzenes; chirality; circularly polarized light; enantiomeric excess; photochromism
Categories
Funding
- JSPS [18K14270, 240142]
- Grants-in-Aid for Scientific Research [18K14270] Funding Source: KAKEN
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The introduction of asymmetry into molecular systems by external chiral stimuli greatly contributes to our understanding of the intriguing homochirality which exists in biomolecules. Circularly polarized light (CPL) is a well-known chiral physical force (right- or left-handed), which can influence the enantiomeric equilibrium of racemic chiral compounds via preferential interaction with one of the enantiomers. As a light absorption moiety in the chiral system, photochromic molecules best contribute to the enhancement of spectral characteristics, which is highly desirable for the experimental observation of CPL-based enantioselective reactions. In this Minireview, CPL-directed enantioselective photochromism, with an emphasis on several azobenzene derivatives, will be discussed. We briefly discuss the recent examples of chiral amplification methods that utilize CPL chiral forces along with a short perspective for future directions.
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