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

• Record Type: Journal Article
• Authors: Kogashi, Kanako; Matsuno, Taisuke; Sato, Sota; Isobe, Hiroyuki
• Is Part Of: Angewandte Chemie. Volume 131:Number 22(2019)
• Page Start: 7463
• Page End: 7467
• Publication Date: 2019-04-30
• Subjects: Chiralität -- Makrocyclen -- Nanoröhren -- Zirkulardichroismus -- Zylinder; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201902893
• Languages: English
• ISSNs: 0044-8249

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 : Schrumpfen nach Maß : Ein Verfahren zur Verengung von starren Zylindercycloarylenen wurde entwickelt. Die chiroptischen Eigenschaften sind weitenabhängig, und das magnetische Übergangsdipolmoment hängt vom Radius eines ringstromartigen Kreises ab, der von lokalen elektrischen Übergangsdipolmomenten auf dem Zylinder erzeugt wird.