Pillararene-Induced Intramolecular Through-Space Charge Transfer and Single-Molecule White-Light Emission

Authors：Li, Qi; Wu, Yitao; Cao, Jiajun; Liu, Yang; Wang, Zeju; Zhu, Huangtianzhi^*; Zhang, Haoke^*; Huang, Feihe^*

Source：Angewandte Chemie - International Edition, 2022, 61(19): e202202381.

DOI：10.1002/anie.202202381

• Donor-Acceptor Systems
• Pillararenes
• Supramolecular Chemistry
• Through-Space Charge Transfer
• White-Light Emission

The fabrication of single-molecule white-light emission (SMWLE) materials has become a highly studied topic in recent years and through-space charge transfer (TSCT) is emerging as an important concept in this field. However, the preparation of ideal TSCT-based SMWLE materials is still a big challenge. Herein, we report a bifunctional pillar[5]arene (TPCN-P5-TPA) with a linear donor-spacer-acceptor structure and aggregation-induced emission (AIE) property. The bulky pillar[5]arene between the donor and acceptor induces a twisted conformation and a non-conjugated structure, resulting in intramolecular TSCT. In addition, the AIE feature and pillar[5]arene cavity endow TPCN-P5-TPA with responsiveness to viscosity and polar guests, by which the TSCT emission is triggered. The combination of blue locally-excited state emission and yellow TSCT emission of TPCN-P5-TPA generates SMWLE. Therefore, we provide a new and versatile strategy for the construction of TSCT-based SMWLE materials.

• Institution
  浙江大学; 郑州大学