Cooperative supramolecular polymers with anthracene‒endoperoxide photo-switching for fluorescent anti-counterfeiting.
Cooperative supramolecular polymers with anthracene‒endoperoxide photo-switching for fluorescent anti-counterfeiting.
复制标题
蒽-内过氧化物光开关协同超分子聚合物荧光防伪
DOI：
10.1038/s41467-018-06392-x
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发表时间：
2018-09-28
影响因子：
16.6
通讯作者：
Wang F
中科院分区：
文献类型：
--
作者：
Gao Z;Han Y;Wang F
在现代信息社会中，人们高度追求创新技术来检测和避免伪造。在此，我们报告了光响应性超分子聚合物的建设，对荧光防伪应用，利用多蒽内过氧化物开关性能。由于σ-金属化效应，蒽的光氧化反应在温和的可见光照射下进行，而后向转化反应在室温下自发进行。超分子聚合物通过协同成核-伸长机制形成，通过双组分共组装策略促进荧光共振能量转移过程。荧光共振能量转移效率受到光引发的蒽内过氧化物转化或蒸汽诱导的单体-聚合物转变的精细调节，导致三种不同状态之间的高对比度荧光变化。在此基础上，通过喷墨印刷技术成功制作了双模防伪图案。因此，光致荧光变色分子的协同超分子聚合代表了一种有效的方法，以提高安全可靠性，快速响应，易于操作的高性能防伪材料。
Innovative technologies are highly pursued for the detection and avoidance of counterfeiting in modern information society. Herein, we report the construction of photo-responsive supramolecular polymers toward fluorescent anti-counterfeit applications, by taking advantage of multicycle anthracene‒endoperoxide switching properties. Due toσ-metalation effect, photo-oxygenation of anthracene to endoperoxide is proceeded under the mild visible light irradiation conditions, while the backward conversion occurs spontaneously at room temperature. Supramolecular polymers are formed with cooperative nucleation‒elongation mechanism, which facilitate fluorescence resonance energy transfer process via two-component co-assembly strategy. Fluorescence resonance energy transfer efficiency is delicately regulated by either light-triggered anthracene‒endoperoxide conversion or vapor-induced monomer–polymer transition, leading to high-contrast fluorescent changes among three different states. On this basis, dual-mode anti-counterfeiting patterns have been successfully fabricated via inkjet printing techniques. Hence, cooperative supramolecular polymerization of photo-fluorochromic molecules represents an efficient approach toward high-performance anti-counterfeit materials with enhanced security reliability, fast response, and ease of operation.
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