A Calix[3]acridan‐Based Host–Guest Cocrystal Exhibiting Efficient Thermally Activated Delayed Fluorescence

作者：Zhou HeYe; Zhang DaWei; Li Meng; Chen ChuanFeng

来源：Angewandte Chemie, 2022, 134(15).

DOI：10.1002/ANGE.202117872

• Charge Transfer
• Cocrystal
• Host–Guest Interactions
• Macrocycles
• Thermally Activated Delayed Fluorescence

A supramolecular strategy to construct thermally activated delayed fluorescence (TADF) materials through host–guest charge transfer interactions was proposed. Consequently, a new class of macrocycle namely calix[3]acridan was conveniently synthesized in 90?% yield. The host–guest cocrystal formed by calix[3]acridan and 1,2‐dicyanobenzene exhibited efficient TADF properties due to intense intermolecular charge transfer interactions. Moreover, the spatially separated highest occupied molecular orbital and lowest unoccupied molecular orbital resulted in a very small singlet–triplet energy gap of 0.014?eV and hence guaranteed an efficient reverse intersystem crossing for TADF. Especially, a high photoluminescence quantum yield of 70?% was achieved, and it represents the highest value among the reported intermolecular donor–acceptor TADF materials.(#br)A novel supramolecular strategy to construct thermally activated delayed fluorescence (TADF) materials has been developed, which has led to the convenient synthesis...

• 单位
  中国科学院; 中国科学院大学