Curved Nanographenes as Stoppers in a [2]Rotaxane with Two-Photon Excited Emission.
Marcos D CodesalArthur H G DavidCarla I M SantosMaria J Álvaro-MartinsErmelinda M S MaçôasAraceli G CampañaVictor BlancoPublished in: The Journal of organic chemistry (2024)
Heptagon-containing distorted nanographenes are used as stoppers for the capping of a [2]rotaxane through a Michael-type addition reaction to vinyl sulfone groups. These curved aromatics are bulky enough to prevent the disassembly of the rotaxane but also give emissive and nonlinear (two-photon absorption and emission) optical properties to the structure.