title: An electrochemically controllable nanomechanical molecular system utilizing edge-to-face and face-to-face aromatic interactions.
abstract: [formula: see text] A new molecular system, 2,11-dithio[4,4]metametaquinocyclophane containing a quinone moiety, was designed and synthesized. As the quinone moiety can readily be converted into an aromatic pi-system (hydroquinone) upon reduction, the nanomechanical molecular cyclophane system exhibits a large flapping motion like a molecular flipper from the electrochemical redox process. The conformational changes upon reduction and oxidation are caused by changes of nonbonding interaction forces (devoid of bond formation/breaking) from the edge-to-face to face-to-face aromatic interactions and vice versa, respectively.
authors.affiliation: National Creative Research Initiative Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, San 31, Hyojadong, Namgu, Pohang 790-784, Korea.
authors.forename: Heon Gon
authors.initials: HG
authors.lastname: Kim
authors.forename: Chi-Wan
authors.initials: CW
authors.lastname: Lee
authors.forename: Sunggoo
authors.initials: S
authors.lastname: Yun
authors.forename: Byung Hee
authors.initials: BH
authors.lastname: Hong
authors.forename: Young-Ok
authors.initials: YO
authors.lastname: Kim
authors.forename: Dongwook
authors.initials: D
authors.lastname: Kim
authors.forename: Hyejae
authors.initials: H
authors.lastname: Ihm
authors.forename: Jung Woo
authors.initials: JW
authors.lastname: Lee
authors.forename: Eun Cheol
authors.initials: EC
authors.lastname: Lee
authors.forename: P
authors.initials: P
authors.lastname: Tarakeshwar
authors.forename: Su-Moon
authors.initials: SM
authors.lastname: Park
authors.forename: Kwang S
authors.initials: KS
authors.lastname: Kim