期刊
CHEM
卷 7, 期 6, 页码 1544-1556出版社
CELL PRESS
DOI: 10.1016/j.chempr.2021.02.019
关键词
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资金
- National Natural Science Foundation of China [22025503, 21790361, 21871084, 21672060]
- Shanghai Municipal Science and Technology Major Project [2018SHZDZX03]
- Fundamental Research Funds for the Central Universities
- Programme of Introducing Talents of Discipline to Universities [B16017]
- Program of Shanghai Academic/Technology Research Leader [19XD1421100]
- Shanghai Science and Technology Committee [17520750100]
- Marie Sklodowska-Curie Action [838280]
- Marie Curie Actions (MSCA) [838280] Funding Source: Marie Curie Actions (MSCA)
This study demonstrates the reversible switching of molecular emission by modulating conformation-adaptive fluorescent systems in mechanically interlocked structures, providing a new approach for controlling molecular emission.
Tuning molecular emission by chemicalmeans has long been a fundamental topic, because the emerging methodologies and mechanisms of this topic usually bring a lot of opportunities in many multi-disciplinary applications. Here, we demonstrate the reversible switching of a conformation-adaptive fluorophore, 9,14-diphenyl-9,14-dihydrodibenzo[ a,c]phenazine (DPAC), by incorporating this fluorescent unit into a mechanically interlocked [2]catenane. Taking advantage of the mechanical bond of [2]catenane, the conformational freedom of the DPAC-macrocycle can be modulated by the co-conformational state of the [2]catenane, thus enabling the reversible switching of the fluorescent properties of DPAC. Owing to the mechanically interlocked structure, this fluorescent molecular system can be switched in a dual-mode (wavelength or intensity), visually recognizable, and highly reversible manner. This work provides a distinctmechanism of switchingmolecular emission by modulating conformation-adaptive fluorescent systems in mechanically interlocked structures.
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