Unraveling the Origin of Multichannel Circularly Polarized Luminescence in a Pyrene‐Functionalized Topologically Chiral [2]Catenane

Author:

Wang Xueli1,Wu Peicong1,Wang Yu2,Cui Tong1,Jia Menghui1,He Xiaoxiao1,Wang Wei2,Pan Haifeng1,Sun Zhenrong1,Yang Hai‐Bo23,Chen Jinquan14ORCID

Affiliation:

1. State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai 200241 China

2. Shanghai Key Laboratory of Green Chemistry and Chemical Processes & Shanghai Frontiers Science Center of Molecule Intelligent Syntheses & Chang-Kung Chuang Institute School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China

3. Institute of Eco-Chongming Shanghai 202162 China

4. Collaborative Innovation Center of Extreme Optics Shanxi University Taiyuan Shanxi 030006 China

Abstract

AbstractMechanically interlocked molecules (MIMs) are promising platforms 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 the optical industry. However, there is currently little knowledge about the CPL emission mechanism or 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 approach to study CPL mechanism, but also provides a theoretical foundation for the rational design of novel chiral materials in the future.

Funder

National Natural Science Foundation of China

East China Normal University

Publisher

Wiley

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