Narrowing Segments of Helical Carbon Nanotubes with Curved Aromatic Panels. Issue 22 (30th April 2019)

• Record Type: Journal Article
• Authors: Kogashi, Kanako; Matsuno, Taisuke; Sato, Sota; Isobe, Hiroyuki
• Is Part Of: Angewandte Chemie international edition. Volume 58:Issue 22(2019)
• Page Start: 7385
• Page End: 7389
• Publication Date: 2019-04-30
• Subjects: chirality -- circular dichroism -- cylinders -- macrocycles -- nanotubes; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201902893
• Languages: English
• ISSNs: 1433-7851

Abstract

Abstract: Rigid molecular cylinders with a 1 nm diameter were synthesized by assembling arylene panels with Pt‐mediated macrocylization. Chrysenylene panels that previously participated in tetrameric macrocyclization were contorted by the addition of two benzo groups on the sides to form dibenzochrysenylene, which allowed for a reduction in the numbers of participating panels to three. Consequently, narrowed cyclochrysenylene congeners were obtained. The narrowed chiral cylinders possessed width‐dependent chiroptical properties. The magnetic transition dipole moment was dictated by the radius of a ring‐current‐like circle that was formed by local electric transition dipole moments on the cylinder. Abstract : Shrink to fit : A method to make rigid cylinder cycloarylenes more narrow was devised. Width‐dependent chiroptical properties were revealed. The magnetic transition dipole moment was dictated by the radius of a ring‐current‐like circle that was formed by local electric transition dipole moments on the cylinder.