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Binaphthyl‐Bridged Pyrenophanes: Intense Circularly Polarized Luminescence Based on a D2 Symmetry Strategy.
- Source :
- Angewandte Chemie; 7/4/2022, Vol. 134 Issue 27, p1-6, 6p
- Publication Year :
- 2022
-
Abstract
- A series of D2‐symmetric macrocycles composed of alternately linked pyrene and binaphthyl moieties (binaphthyl‐bridged pyrenophanes) have been synthesized. Among them, a pyrenophane possessing ether linkers at the 2,7‐positions of the pyrenes exhibited intense circularly polarized luminescence (CPL) with a |glum| value of 0.053. This value is by far the highest for excimers and was not sensitive to temperature, solvent, or concentration. The CPL originated from a twisting pyrene excimer, with the (R)‐binaphthyl moieties producing a left‐handed twist excimer, which exhibited (−)‐CPL. The electric and magnetic transition dipole moments are perfectly parallel, which is the best relationship for strong CPL. [ABSTRACT FROM AUTHOR]
- Subjects :
- ELECTRIC dipole transitions
LUMINESCENCE
MAGNETIC dipole moments
EXCIMERS
SYMMETRY
Subjects
Details
- Language :
- English
- ISSN :
- 00448249
- Volume :
- 134
- Issue :
- 27
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie
- Publication Type :
- Academic Journal
- Accession number :
- 157665866
- Full Text :
- https://doi.org/10.1002/ange.202204609