Academic Journal
Simultaneous Detection of Circularly Polarized Luminescence and Raman Optical Activity in an Organic Molecular Lemniscate
| العنوان: | Simultaneous Detection of Circularly Polarized Luminescence and Raman Optical Activity in an Organic Molecular Lemniscate |
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| المؤلفون: | Palomo, Luis, Favereau, Ludovic, Senthilkumar, Kabali, Stępień, Marcin, Casado-Cordón, Juan, Ramírez-Aguilar, Francisco Javier |
| بيانات النشر: | Wiley |
| سنة النشر: | 2022 |
| المجموعة: | RIUMA - Repositorio Institucional de la Universidad de Málaga |
| مصطلحات موضوعية: | Luz -- Dispersión, Circularly polarized luminescence, Raman optical activity, Oligophenylene, Bicarbazole, Spectroscopic devices |
| الوصف: | Circularly polarized luminescence (CPL) and Raman optical activity (ROA) were observed in a single spectroscopic experiment for a purely organic molecule, an event that had so far been limited to lanthanide-based complexes. The present observation was achieved for [16]cycloparaphenylene lemniscate, a double macrocycle constrained by a rigid 9,9′-bicarbazole subunit, which introduces a chirality source and allows the molecule to be resolved into two configurationally stable enantiomers. Distortion of oligophenylene loops in this lemniscular structure produces a large magnetic transition dipole moment while maintaining the π-conjugation-induced enhancement of the Raman signal, causing the appearance of the CPL/ROA couple. A two-photon mechanism is proposed to explain the population of the lowest-energy excited electronic state prior to the simultaneous emission-scattering event. ; We thank MINECO/FEDER of the Spanish Government (project reference PGC2018-098533-B-100 and PID2021-127127NB-I00) and the Junta de Andalucía, Spain (UMA18FEDERJA057). We also thank the vibrational spectroscopy unit of the Research Central Services (SCAI) of the University of Málaga. Financial support from the National Science Center of Poland (DEC-2015/19/B/ST5/00612, M.S.) is gratefully acknowledged. L.F. thanks Thomas Vives from the Ecole Nationale Supérieure de Chimie of Rennes, the Shimadzu and Chiral Technology companies for their support regarding the separation of the chiral molecule by supercritical fluid chromatography (SFC). Funding for open access charge: Universidad de Málaga/CBUA |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | L. Palomo, L. Favereau, K. Senthilkumar, M. Stępień, J. Casado, F. J. Ramírez, Angew. Chem. Int. Ed. 2022, 61, e202206976; Angew. Chem. 2022, 134, e202206976; https://hdl.handle.net/10630/24807; https://doi.org/10.1002/anie.202206976 |
| DOI: | 10.1002/anie.202206976 |
| الاتاحة: | https://hdl.handle.net/10630/24807 https://doi.org/10.1002/anie.202206976 |
| Rights: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by-nc-nd/4.0/ ; Attribution-NonCommercial-NoDerivatives 4.0 Internacional |
| رقم الانضمام: | edsbas.6D4C4FCB |
| قاعدة البيانات: | BASE |
| DOI: | 10.1002/anie.202206976 |
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