title: Electron Delocalization in Perylene Diimide Helicenes.
abstract: We report two new helicenes derived from the double fusion of an acene with two perylene diimide (PDI) subunits. These PDI-helicene homologs exhibit very different structural and electronic properties, despite differing by only a single ring in the link between the PDI units. The shorter inter-PDI link brings the two PDI subunits closer together, and this results in the collision of their respective π-electron clouds. This collision facilitates intramolecular through-space electronic delocalization when the PDI-helicene is reduced.
authors.affiliation: Chemistry Department, Columbia University, New York, NY, 10027, USA.
authors.forename: Nathaniel J
authors.initials: NJ
authors.lastname: Schuster
authors.affiliation: Chemistry Department, Columbia University, New York, NY, 10027, USA.
authors.forename: Daniel W
authors.initials: DW
authors.lastname: Paley
authors.affiliation: Chemistry Department, Columbia University, New York, NY, 10027, USA.
authors.forename: Steffen
authors.initials: S
authors.lastname: Jockusch
authors.affiliation: Chemistry Department, Columbia University, New York, NY, 10027, USA.
authors.forename: Fay
authors.initials: F
authors.lastname: Ng
authors.affiliation: Chemistry Department, Columbia University, New York, NY, 10027, USA. mls2064@columbia.edu.
authors.forename: Michael L
authors.initials: ML
authors.lastname: Steigerwald
authors.affiliation: Chemistry Department, Columbia University, New York, NY, 10027, USA. cn37@columbia.edu.
authors.forename: Colin
authors.initials: C
authors.lastname: Nuckolls
keywords: chirality; helicenes; mixed-valence compounds; perylene diimide; π-π interactions