Molecular conformation modulating luminescence switching between delayed fluorescence and room-temperature phosphorescence
文献类型：期刊论文
| 作者 | Y. Wen; S. Xiao; H. Liu; X. Tian; J. De; T. Lu; Z. Yang; D. Zou; Y. Lv; S.-T. Zhang |
| 刊名 | Journal of Materials Chemistry C
 |
| 出版日期 | 2021 |
| 卷号 | 9期号:48页码:17511-17517 |
| ISSN号 | 20507534 |
| DOI | 10.1039/d1tc02265b |
| 英文摘要 | A new pure organic donor-acceptor molecule, (4-chlorophenyl)(5H-dibenzo[b,f]azepin-5-yl)methanone (IS-CBZ), was designed and synthesized, which demonstrates near ultraviolet (NUV) delayed fluorescence (DF) and dual emission of NUV DF and yellow room-temperature phosphorescence (RTP) in two crystals (B-crystal and Y-crystal), respectively. These two kinds of luminescence (DF and RTP) can be reversibly switched by external stimuli, such as grinding and heating/fuming, accompanied by reversible phase transition between two crystalline states. The experimental and theoretical studies reveal that this switchable luminescence between DF and RTP originates from a single-molecule conformational change in different molecular packings, mainly involving the twist angle () between the donor and acceptor units. Thisfundamentally modulates the energy difference between the lowest singlet state (S1) and the high-lying triplet state (T2), ES1-T2, which determines the luminescence switching between DF and RTP. This work not only provides a new donor-acceptor architecture for pure organic multifunctional materials with mechanochromic luminescence (MCL) and mechanoluminescence (ML) properties, but also suggests a novel strategy to design stimuli-responsive materials with a unique luminescence switching between DF and RTP by tuning T2 The Royal Society of Chemistry 2021. |
| URL标识 | 查看原文 |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/65432]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 GB/T 7714 | Y. Wen,S. Xiao,H. Liu,et al. Molecular conformation modulating luminescence switching between delayed fluorescence and room-temperature phosphorescence[J]. Journal of Materials Chemistry C,2021,9(48):17511-17517. |
| APA | Y. Wen.,S. Xiao.,H. Liu.,X. Tian.,J. De.,...&Q. Su and B. Yang.(2021).Molecular conformation modulating luminescence switching between delayed fluorescence and room-temperature phosphorescence.Journal of Materials Chemistry C,9(48),17511-17517. |
| MLA | Y. Wen,et al."Molecular conformation modulating luminescence switching between delayed fluorescence and room-temperature phosphorescence".Journal of Materials Chemistry C 9.48(2021):17511-17517. |
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