Journal
SCIENCE CHINA-CHEMISTRY
Volume 65, Issue 8, Pages 1538-1543Publisher
SCIENCE PRESS
DOI: 10.1007/s11426-022-1255-1
Keywords
room-temperature phosphorescence; radical emission; supramolecular self-assembly; anti-counterfeiting
Categories
Funding
- National Key R&D Program of China [2020YFA0709900]
- National Natural Science Foundation of China [21975120, 62134007, 21875104, 21973043]
- Talented of Nanjing Tech University [201983]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX21-1101]
- China National Postdoctoral Program for Innovative Talents [BX20200278]
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This study demonstrates a strategy for dynamic RTP through reversible transformation of radicals, showing excellent reversibility and repeatability, with potential applications for round-the-clock anti-counterfeiting and tag.
Room-temperature phosphorescence (RTP) with a dynamic feature endows organic luminescent materials with promising application in optoelectronic fields. However, it remains a formidable challenge to obtain dynamic RTP materials. Herein, we reported a strategy for dynamic RTP via reversible transformation of radicals under external stimuli. RTP gradually disappeared with continuous UV-light irradiation owing to the conversion of NDIA to NDIA(center dot-) in NDIA/PVA film, which can be recovered by oxidation with oxygen. Regarding the excellent reversibility and repeatability, the potential applications for round-the-clock anti-counterfeiting and tag were first demonstrated. This finding not only outlines a principle to synthesize new RTP materials with dynamic behavior, but also expands the scope of applications of dynamic RTP materials.
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