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- Title
Temperature‐Induced Sign Inversion of Circularly Polarized Luminescence of Binaphthyl‐Bridged Tetrathiapyrenophanes.
- Authors
Takaishi, Kazuto; Yoshinami, Fumiya; Sato, Yoshihiro; Ema, Tadashi
- Abstract
D2‐symmetric (R)‐binaphthyl‐bridged pyrenophanes containing thioether bonds were synthesized. The pyrenophanes exhibited the temperature‐induced sign inversion of circularly polarized luminescence (CPL) while maintaining the emission wavelength and reversibility. The Δglum value reached 0.02, and the FL quenching by heat was negligible. The sign inversion of CPL originates from the inversion of intramolecular excimer chirality associated with excitation dynamics. The two pyrenes form a kinetically trapped left‐handed twist excimer at low temperatures, while they form a thermodynamically favored right‐handed twist excimer at high temperatures. The thioether linkers can impart flexibility suitable for the inversion of chirality of the excimers.
- Subjects
EXCIMERS; LOW temperatures; HIGH temperatures; CHIRALITY; LUMINESCENCE; CHIRALITY of nuclear particles
- Publication
Chemistry - A European Journal, 2024, Vol 30, Issue 32, p1
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202400866