Unraveling the Origin of Multichannel Circularly Polarized Luminescence in a Pyrene-Functionalized Topologically Chiral [2]Catenane.
Angew Chem Int Ed Engl
; : e202407929, 2024 Jun 04.
Article
de En
| MEDLINE
| ID: mdl-38837292
ABSTRACT
Mechanically interlocked molecules (MIMs) are promising platform for developing functionalized artificial molecular machines. The construction of chiral MIMs with appealing circularly polarized luminescence (CPL) properties has boosted their potential application in biomedicine and optical industry. However, there is currently little knowledge about the CPL emission mechanism as well as the emission dynamics of these related MIMs. Herein, we demonstrate that time-resolved circularly polarized luminescence (TRCPL) spectroscopy combined with transient absorption (TA) spectroscopy offers a feasible approach to elucidate the origins of CPL emission in pyrene-functionalized topologically chiral [2]catenane as well as in a series of pyrene-functionalized chiral molecules. For the first time, direct evidence differentiating the chiroptical signals originating from either topological (local state emission) or Euclidean chirality (excimer state emission) in these pyrene-functionalized chiral molecules has been discovered. Our work not only establishes a novel and ideal methodology to study CPL mechanism, but also provides a theoretical foundation for the rational design of novel chiral materials in the future.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
Angew Chem Int Ed Engl
Année:
2024
Type de document:
Article
Pays d'affiliation:
Chine