title: Evidence of strong hydration and significant tilt of amphiphilic [2]rotaxane molecules in Langmuir films studied by synchrotron X-ray reflectivity.
abstract: Surface sensitive X-ray techniques have been used to elucidate the structures of amphiphilic [2]rotaxane and dumbbell monolayers at the air/water interface. The [2]rotaxanes were found to adopt highly hydrated tilted and/or folded conformations on the water surface largely due to the hydrophilic nature of their tetracationic ring component. This conformation was less pronounced in monolayers of the dumbbell precursors. Increasing the surface pressure resulted in an expansion of [2]rotaxane monolayers in the vertical direction and decreased hydration.
authors.forename: Kasper
authors.initials: K
authors.lastname: Nørgaard
authors.forename: Jan O
authors.initials: JO
authors.lastname: Jeppesen
authors.forename: Bo W
authors.initials: BW
authors.lastname: Laursen
authors.forename: Jens B
authors.initials: JB
authors.lastname: Simonsen
authors.forename: Markus J
authors.initials: MJ
authors.lastname: Weygand
authors.forename: Kristian
authors.initials: K
authors.lastname: Kjaer
authors.forename: J Fraser
authors.initials: JF
authors.lastname: Stoddart
authors.forename: Thomas
authors.initials: T
authors.lastname: Bjørnholm