title: Optically active oligomer units in aggregates of a highly unsaturated, optically inactive carotenoid phospholipid.
abstract: Enantiomers of glycerophospholipids show low or no optical activity. Accordingly, optical activity was not observed with the R enantiomer of a highly unsaturated carotenoyl lysophospholipid in solution. In spite of this, strong Cotton effects are detected in water. The amphiphilic carotenoid-phospholipid monomers associate to form aggregates, whose optical activity is attributed to oligomeric entities. These small helical assemblies cannot exist independently. Yet, the calculated octamer represents the simplest repeating primary unit that sufficiently expresses the absorption properties and supramolecular optical activity.
authors.affiliation: Norges Teknisk Naturvitenskapelige Universitet (NTNU) Institutt for Kjemi, Trondheim, Norway.
authors.forename: Bente Jeanette
authors.initials: BJ
authors.lastname: Foss
authors.forename: Hans-Richard
authors.initials: HR
authors.lastname: Sliwka
authors.forename: Vassilia
authors.initials: V
authors.lastname: Partali
authors.forename: Christian
authors.initials: C
authors.lastname: Köpsel
authors.forename: Bernhard
authors.initials: B
authors.lastname: Mayer
authors.forename: Hans-Dieter
authors.initials: HD
authors.lastname: Martin
authors.forename: Ferenc
authors.initials: F
authors.lastname: Zsila
authors.forename: Zsolt
authors.initials: Z
authors.lastname: Bikadi
authors.forename: Miklos
authors.initials: M
authors.lastname: Simonyi
mesh_terms: D002794:Choline / Q000031:analogs & derivatives* / Q000737:chemistry*; D008246:Lysophospholipids / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure
chemical_list: D008246:Lysophospholipids; D002794:Choline