Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 61, Issue 19, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202202381
Keywords
Donor-Acceptor Systems; Pillararenes; Supramolecular Chemistry; Through-Space Charge Transfer; White-Light Emission
Categories
Funding
- National Key Research and Development Program of China [2021YFA0910100]
- National Natural Science Foundation of China [22035006]
- Zhejiang Provincial Natural Science Foundation of China [LD21B020001]
- Starry Night Science Fund of Zhejiang University Shanghai Institute for Advanced Study [SN-ZJU-SIAS-006]
- Fundamental Research Funds for the Central Universities [2021QNA4032]
- Open Fund of Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates and South China University of Technology [2019B030301003]
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The fabrication of single-molecule white-light emission materials through-space charge transfer (TSCT) is a highly studied topic, but preparing ideal materials is still a challenge. This study reports a bifunctional pillar[5]arene with aggregation-induced emission (AIE) property, which achieves intramolecular TSCT emission through its twisted conformation and non-conjugated structure, and triggers emission through the AIE feature and responsiveness to viscosity and polar guests.
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.
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