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Published on: August 22, 2018
Synthesis of J-aggregating dibenz[a,j]anthracene-based macrocycles
Julian M W Chan1, Jonathan R Tischler, Steve E Kooi
1Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
New fluorescent macrocycles form J-aggregates, exhibiting enhanced optical properties. These J-aggregates show potential for optoelectronic devices due to high luminescence efficiency.
Area of Science:
- Organic Chemistry
- Materials Science
- Photophysics
Background:
- Dibenz[a,j]anthracene derivatives are explored for optoelectronic applications.
- J-aggregates offer unique optical properties, including red-shifted absorption and emission.
Purpose of the Study:
- Synthesize novel fluorescent macrocycles based on 1,3-butadiyne-bridged dibenz[a,j]anthracene.
- Investigate the photophysical properties and J-aggregate formation of these macrocycles.
- Evaluate their potential for optoelectronic devices.
Main Methods:
- Multistep synthesis involving functionalized dibenz[a,j]anthracene building blocks.
- Modified Glaser coupling under high-dilution conditions for macrocyclization.
- Photophysical studies including absorption, emission spectroscopy, and quantum efficiency measurements.
Main Results:
- Successful synthesis of fluorescent macrocycles with 1,3-butadiyne bridges.
- Observation of J-aggregate formation in thin films and solid solutions.
- Characterization of J-aggregates with red-shifted spectra, enhanced absorption, narrowed linewidths, and low Stokes shifts.
- Achieved high luminescence quantum efficiency (up to 92%) after annealing.
Conclusions:
- A new class of J-aggregates based on fluorescent macrocycles has been developed.
- These J-aggregates exhibit promising spectral features and high luminescence efficiency.
- The synthesized macrocycles hold potential for applications in optoelectronic devices.
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