期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 28, 期 29, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202200458
关键词
conformation transition; dual emission; mechanochromism; polymorph prediction; triplet emission
资金
- National Natural Science Foundation of China [22171163]
- Fundamental Research Funds for the Central Universities [2232021A-06]
- Hubei Provincial Education Department [D20211202]
- 111 Project [D20015]
This study presents a rational design strategy for the development of high-contrast stimulus-responsive phenothiazine derivatives with dual emissions and mechanochromism. The designed derivatives exhibit significant emission differences under mechanical force and also demonstrate aggregation-induced emission. These materials show promise for applications in encryption and anti-counterfeiting.
The development of high-contrast stimulus-responsive materials with excited triplet emission is of great significance for anti-counterfeiting, sensor and memory applications, but remains a challenge. Here, we report a strategy for the rational design of stimulus-responsive phenothiazine derivatives with triplet-related dual emissions and high-contrast mechanochromism guided by Polymorph Prediction. The designed phenothiazine derivatives have the characters of simple structures, a facile synthetic procedure, and a good crystalline nature. We found that the crystals of those derivatives with the potential to form both quasi-axial (ax) and quasi-equatorial (eq) conformations could undergo conformation transition and show significant emission difference (Delta lambda(em)>100 nm) under mechanical force. Meanwhile, all these phenothiazine derivatives exhibit aggregation-induced emission and emit room-temperature phosphorescence or thermally activated delayed fluorescence. The significant luminescent change of these materials under different stimuli gives them promise for applications in encryption and anti-counterfeiting.
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