Lemniscular [16]Cycloparaphenylene: A Radially Conjugated Figure-Eight Aromatic MoleculeClick to copy article linkArticle link copied!
- Kabali SenthilkumarKabali SenthilkumarWydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, PolandMore by Kabali Senthilkumar
- Mateusz KondratowiczMateusz KondratowiczWydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, PolandMore by Mateusz Kondratowicz
- Tadeusz LisTadeusz LisWydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, PolandMore by Tadeusz Lis
- Piotr J. ChmielewskiPiotr J. ChmielewskiWydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, PolandMore by Piotr J. Chmielewski
- Joanna CybińskaJoanna CybińskaWydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, PolandPORT − Polski Ośrodek Rozwoju Technologii, ul. Stabłowicka 147, 54-066 Wrocław, PolandMore by Joanna Cybińska
- José L. ZafraJosé L. ZafraDepartamento Química Física, Universidad de Málaga, Andalucia-Tech Campus de Teatinos s/n, 29071 Málaga, SpainMore by José L. Zafra
- Juan Casado*Juan Casado*[email protected]Departamento Química Física, Universidad de Málaga, Andalucia-Tech Campus de Teatinos s/n, 29071 Málaga, SpainMore by Juan Casado
- Thomas VivesThomas VivesUniversité Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR UMR 6226, F-35000 Rennes, FranceMore by Thomas Vives
- Jeanne CrassousJeanne CrassousUniversité Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226, F-35000 Rennes, FranceMore by Jeanne Crassous
- Ludovic FavereauLudovic FavereauUniversité Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) UMR 6226, F-35000 Rennes, FranceMore by Ludovic Favereau
- Marcin Stępień*Marcin Stępień*[email protected]Wydział Chemii, Uniwersytet Wrocławski, ul. F. Joliot-Curie 14, 50-383 Wrocław, PolandMore by Marcin Stępień
Abstract
A cycloparaphenylene-based molecular lemniscate (CPPL) was obtained in a short synthesis involving masked p-phenylene equivalents. The strained figure-eight geometry of CPPL is sustained by the incorporated 9,9′-bicarbazole subunit, which also acts as a stereogenic element. The shape of the distorted [16]cycloparaphenylene nanohoop embedded in CPPL is accurately approximated with a Booth lemniscate. The structure of CPPL, investigated using NMR and Raman spectroscopic methods, revealed strain-dependent features, consistent with the variable curvature of the ring. The electronic and optical properties of CPPL combine features more characteristic of smaller cycloparaphenylenes, such as a reduced optical bandgap and red-shifted fluorescence. CPPL was resolved into enantiomers, which are configurationally stable and provide strong chiroptical responses, including circularly polarized luminescence.
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