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Aggregation-Induced Emission and Circularly Polarized Luminescence Duality in Tetracationic Binaphthyl-Based Cyclophanes

Journal Article · · Angewandte Chemie (International Edition)
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [3];  [4];  [1];  [1];  [1];  [2];  [5];  [1];  [2];  [6]
  1. Northwestern Univ., Evanston, IL (United States)
  2. Univ. of Granada (Spain)
  3. University Burgundy Franche-Comté (France)
  4. Paris Sciences et Lettres (PSL) University (France); Centre National de la Recherche Scientifique-Mixed Organizations (CNRS-UMR), Paris (France); Paris Cité University (France)
  5. Northwestern Univ., Evanston, IL (United States); Northwestern Univ., Chicago, IL (United States)
  6. Northwestern Univ., Evanston, IL (United States); Univ. of New South Wales, Sydney, NSW (Australia); Zhejiang Univ., Hangzhou (China)
Here, we report an approach to the synthesis of highly charged enantiopure cyclophanes by the insertion of axially chiral enantiomeric binaphthyl fluorophores into the constitutions of pyridinium-based macrocycles. Remarkably, these fluorescent tetracationic cyclophanes exhibit a significant AIE compared to their neutral optically active binaphthyl precursors. A combination of theoretical calculations and time-resolved spectroscopy reveal that the AIE originates from limited torsional vibrations associated with the axes of chirality present in the chiral enantiomeric binaphthyl units and the fine-tuning of their electronic landscape when incorporated within the cyclophane structure. Furthermore, these highly charged enantiopure cyclophanes display CPL responses both in solution and in the aggregated state. This unique duality of AIE and CPL in these tetracationic cyclophanes is destined to be of major importance in future development of photonic devices and bio-applications.
Research Organization:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
SC0000989
OSTI ID:
1882762
Alternate ID(s):
OSTI ID: 1882765
OSTI ID: 2419551
Journal Information:
Angewandte Chemie (International Edition), Journal Name: Angewandte Chemie (International Edition) Journal Issue: 40 Vol. 61; ISSN 1433-7851
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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