title: Intramolecular Pancake Bonding in Helical Structures.
abstract: We show that diradicaloid helical conjugated molecules can display strong through-space bonding interactions. These interactions are analogous to π-stacking pancake bonding widely observed for dimers and other aggregates of stable π-conjugated radicals. We show that these multicenter interactions can have a significant stabilizing effect, but they depend in subtle ways on the specific overlap and relative orientations of the radical carrying subunits. The specific through-space interactions between the radicaloid units occur at specific size ranges of the helical molecules.
authors.affiliation: Department of Chemistry and Institute of Soft Matter, Georgetown University, 37thand O Streets, Washington, DC, 20057-1227, USA.|Depertment of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.
authors.forename: Shota
authors.initials: S
authors.lastname: Takamuku
authors.affiliation: Depertment of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.|Center for Spintronics Research Network (CSRN), Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka, 560-8531, Japan.
authors.forename: Masayoshi
authors.identifier: http://orcid.org/0000-0002-3544-1290
authors.initials: M
authors.lastname: Nakano
authors.affiliation: Department of Chemistry and Institute of Soft Matter, Georgetown University, 37thand O Streets, Washington, DC, 20057-1227, USA.
authors.forename: Miklos
authors.identifier: http://orcid.org/0000-0002-7930-3260
authors.initials: M
authors.lastname: Kertesz
keywords: helical structures; pancake bonding; radicals; through-space interactions; π-stacking