期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 33, 页码 10640-10645出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201805967
关键词
aggregation-induced emission; carboranes; chrysene; excimers; intramolecular charge transfer
资金
- EPRSC [EP/G037515/1, EP/L016702/1]
- AWE
- EPSRC UK National Mass Spectrometry Facility at Swansea University
- Marie Sklodowska-Curie Actions Innovative Training Networks [H2020-MSCA- ITN-2014 INFORM -675867]
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.
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