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Medientyp:
E-Artikel
Titel:
Significance of Vibronic Coupling that Shapes Circularly Polarized Luminescence of Double Helicenes
Beteiligte:
Mori, Tadashi
Erschienen:
Wiley, 2024
Erschienen in:Angewandte Chemie International Edition
Sprache:
Englisch
DOI:
10.1002/anie.202319702
ISSN:
1433-7851;
1521-3773
Entstehung:
Anmerkungen:
Beschreibung:
<jats:title>Abstract</jats:title><jats:p>The circularly polarized luminescence (CPL) spectra of <jats:italic>S</jats:italic>‐ and <jats:italic>X</jats:italic>‐shaped double helicenes exhibit distinct vibrational structures and overall shape variations. In this study, we conducted an in‐depth investigation into the vibronic effects influencing the CPL spectra of two double helicenes, namely <jats:bold>DPC</jats:bold> and <jats:bold>DNH</jats:bold>. Employing state‐of‐the‐art computations utilizing the FC‐HT<jats:sub>1</jats:sub>|VH model at the CAM−B3LYP/def2‐TZVP level, we unveiled the paramount impact of Franck–Condon (FC), Herzberg‐Teller (HT), and Duschinsky effects on their chiroptical responses. Our research underscores the pivotal role of structural deformations associated with the S<jats:sub>1</jats:sub>‐to‐S<jats:sub>0</jats:sub> electronic transition in molding CPL spectra and wavelength‐dependent dissymmetry (<jats:italic>g</jats:italic>) factor values, as well as the significance of HT effects in shaping and enhancing CPL responses. This extensive investigation not only advances our comprehension of the vibronic characteristics in configurationally distinct double helicenes but also offers valuable insights for the design of chiral molecules featuring controllable or finely‐tunable CPL responses.</jats:p>