Abstract
The synthesis of a highly twisted chrysene derivative incorporating two electron deficient o-carboranyl groups is reported. The molecule exhibits a complex, excitation-dependent photoluminescence, including aggregation-induced emission (AIE) with good quantum efficiency and an exceptionally long singlet excited state lifetime. Through a combination of detailed optical studies and theoretical calculations, the excited state species are identified, including an unusual excimer induced by the presence of o-carborane. This is the first time that o-carborane has been shown to induce excimer formation ab initio, as well as the first observation of excimer emission by a chrysene-based small molecule in solution. Bis-o-carboranyl chrysene is thus an initial member of a new family of o-carboranyl phenacenes exhibiting a novel architecture for highly-efficient multi-luminescent fluorophores.
Original language | English |
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Pages (from-to) | 10640-10645 |
Number of pages | 6 |
Journal | Angewandte Chemie - International Edition |
Volume | 57 |
Issue number | 33 |
DOIs | |
Publication status | Published - 13 Aug 2018 |
Keywords
- Aggregation-induced emission
- Carboranes
- Chrysene
- Excimers
- Intramolecular charge transfer
- intramolecular charge transfer
- chrysene
- carboranes
- aggregation-induced emission
- excimers