title: Dynamic chiral selection and amplification using photoresponsive organogelators.
abstract: The ability to select, amplify, and lock dynamic equilibria is of great interest into understanding and applying chiral systems in Nature. The dynamic equilibrium between P and M helicity of a nonchiral diarylethene switch 3 could selectively be coaggregated in the gel state by complementary chiral switches 1 and 2 (that itself is also subjected to the same equilibrium between P and M helicity). Enantiomeric excess as high as 94% was observed during this dual task for 1 and 2 (arranging itself and 3 in only one conformation during aggregation). Interestingly, opposite chiral induction was observed, although the conformation of both 1 and 2 is R.
authors.affiliation: Laboratory of Organic Chemistry, Stratingh Institute, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
authors.forename: Jaap J D
authors.initials: JJ
authors.lastname: de Jong
authors.forename: Theodora D
authors.initials: TD
authors.lastname: Tiemersma-Wegman
authors.forename: Jan H
authors.initials: JH
authors.lastname: van Esch
authors.forename: Ben L
authors.initials: BL
authors.lastname: Feringa
mesh_terms: D005030:Ethylenes / Q000138:chemical synthesis* / Q000737:chemistry / Q000528:radiation effects*; D005782:Gels / Q000138:chemical synthesis / Q000737:chemistry / Q000528:radiation effects; D006860:Hydrogen Bonding; D015394:Molecular Structure; D008970:Molecular Weight; D010777:Photochemistry
chemical_list: D005030:Ethylenes; D005782:Gels