Abstract
A photoredox-catalyst- and template-free sunlight-induced molecular dimerization of a vinylpyridine-functionalized tetraarylaminoborane (TAAB) has been accomplished for the first time. The reaction is quantitative, highly regioselective, and thermally irreversible. The presence of the propeller-shaped TAAB framework allows selective photodimerization of one of the two vinyl pyridine units. Monomer 1 and photodimer 2 exhibit distinct photophysical properties with delayed fluorescence (DF) both in solution and the solid state, which was confirmed by steady-state and time-resolved luminescence studies. Quantum mechanical calculations were performed to support the experimental observations. Our new approach using [2+2] cycloaddition chemistry paves the way for the development of highly sought-after deep-blue DF materials.
| Original language | English |
|---|---|
| Pages (from-to) | 16806-16810 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 57 |
| Issue number | 51 |
| DOIs | |
| State | Published - 17 Dec 2018 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
Funding
Authors thank the science and engineering research board (SERB), India and Indian Institute of Science, Bangalore for financial support.
| Funders |
|---|
| Indian Institute of Science |
| Science and Engineering Research Board |
Keywords
- aminoboranes
- boron
- delayed fluorescence
- photodimerization
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