Photoexcitation‐Induced Chiral Self‐Assembly for Phosphorescence‐to‐Thermally Activated Delayed Fluorescence Transformation
Phosphorescence and thermally activated delayed fluorescence are currently two important photophysical pathways that have greatly promoted the development of display, sensing, and bioimaging. However, achieving in situ conversion of these two photophysical pathways within the same molecule is extremely challenging. In this study, we covalently bond chiral donor-acceptor-donor' structures into a photoexcitation-induced aggregated molecule, specifically hexathiobenzene, to achieve this goal through light irradiation. Initially, the target molecules predominantly exhibit phosphorescent properties. Upon photoirradiation, chiral self-assembly occurs within the target molecules, which gives rise to a thermally activated delayed fluorescence (TADF)-dominant emission behavior. This TADF emission relies on a self-assembly structure that can effectively prevent oxygen from quenching triplet excitons, resulting in stronger signal intensity and longer photoluminescence lifetime. Consequently, a real time improvement of time-resolved bioimaging can be achieved with the utilization of our strategy, rendering selectively dynamic control of imaging parameters at the desired time- and spatial resolution.
Authors
- Danfeng Ye (ORCID: https://orcid.org/0000-0002-2418-2617)
- Yunhui Wan
- Shan Li (ORCID: https://orcid.org/0000-0002-1005-3216)
- Ziran Tang (ORCID: https://orcid.org/0000-0003-3922-4266)
- Smruti Ranjan Sahoo (ORCID: https://orcid.org/0000-0002-0295-2537)
- Hans Ågren (ORCID: https://orcid.org/0000-0002-1763-9383)
- Zhensheng Tao (ORCID: https://orcid.org/0000-0002-8727-3719)
- Glib Baryshnikov (ORCID: https://orcid.org/0000-0002-0716-3385)
- Haiyan Yang (ORCID: https://orcid.org/0000-0001-7870-1139)
- Xudong Wang (ORCID: https://orcid.org/0000-0002-3402-7995)
- Yulong Shi (ORCID: https://orcid.org/0009-0006-0961-9442)
- Rui Jiang (ORCID: https://orcid.org/0009-0006-3778-471X)
- Liangliang Zhu (ORCID: https://orcid.org/0000-0001-9946-008X)
Institutions
- Linköping University (SE)
- Ningbo University (CN)
- Wrocław University of Science and Technology (PL)
- Uppsala University (SE)
- Ningbo University of Technology (CN)
- Shenzhen University (CN)
- Fudan University (CN)
- First People's Hospital of Yunnan Province (CN)
- State Key Laboratory of Surface Physics
- AGH University of Krakow (PL)
Publication Details
- Journal
- Angewandte Chemie International Edition
- Published
- 2025-10-29
- DOI
- https://doi.org/10.1002/anie.202516591
- Primary Topic
- Luminescence and Fluorescent Materials
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- European Commission
- National Science Council
- Linköpings Universitet
- Vetenskapsrådet
- Tianjin University
- National Supercomputer Centre, Linköpings Universitet