1. Fluorene-based conjugates with geminal donor-acceptor: synthesis, photophysical properties and theoretical studies.
- Author
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Majumder, Riya, Jana, Debabrata, and Ghorai, Binay K
- Subjects
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TRIPHENYLAMINE , *FLUORESCENCE spectroscopy , *THIN films , *CHEMICAL synthesis , *REDUCED instruction set computers , *FLUORENE - Abstract
We report six new 2,6-disubstituted fluorene-based conjugated molecules carrying orthogonal triphenylamine and pyridine moiety as donor-acceptor units at the C-9 position. The geminal donor-acceptor is connected to the fluorene core by σ-conjugation. Optical/solvatochromic studies, investigated by UV-VIS absorption and fluorescence spectroscopy, show blue emission with good quantum yield (40–70%) in solution and in thin film state for the synthesized compounds. In microsecond order, the derivatives give a shorter delayed lifetime (both in solution and thin films), facilitating reverse intersystem crossing (RISC). TD-DFT studies for all the derivatives show minimal singlet-triplet splitting in the gas phase (close to 0.2 eV), and the high thermal stability confirmed by the compound's TGA method (320–398 °C) makes them very useful in the optoelectronic market. D-σ-π-σ-A based blue emitters carrying orthogonal triphenylamine and pyridine moiety as donor-acceptor unit at C-9 position were synthesized. Optical/solvatochromic studies, investigated by UV-VIS absorption and fluorescence spectroscopy, show blue emission with good quantum yield (40–70%) in solution and in thin film state for the synthesized compounds. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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