Solid Materials with Near‐Infrared‐Induced Fluorescence Modulation,Advanced Optical Materials

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Solid Materials with Near‐Infrared‐Induced Fluorescence Modulation
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2020-09-03 , DOI: 10.1002/adom.202001063
Jaume Ramon Otaegui ₁ , Pau Rubirola ₂ , Daniel Ruiz‐Molina ₂ , Jordi Hernando ₁ , Claudio Roscini ₂

Affiliation

Solid molecular materials modulating their luminescent properties upon irradiation are typically based on photochromic dyes. Despite these are potentially interesting for applications such as anticounterfeiting, bioimaging, optical data storage, and writable/erasable devices, key features are preventing their use in marketable products: the lack of straightforward strategies to obtain near infrared (NIR) radiation‐responding photochromic dyes and the dramatic response modification these molecules suffer in solids. Herein a photochrome‐free approach is reported to achieve solid materials whose luminescence modulation is induced by NIR radiation. This strategy is based on the capacity of phase change materials (PCMs) to modify the emission properties of fluorescent dyes upon photothermally induced interconversion between their solid and liquid states. The preparation of several NIR‐responsive thermofluorochromic materials of high fatigue resistance and nondestructive readout is illustrated and this approach is extended to different commercially available dyes, taking advantage of distinct fluorescence modulation mechanisms, providing, thus, color tunability. The modulation response is straightforwardly tuned by simply varying the irradiation power density, the gold nanoshell concentration, and/or the PCM type. This tunability allows to accomplish NIR‐activated multistate thermofluorochromic materials and fast/slow/irreversible responses in NIR‐writings/drawings of good spatial resolution, which can be of interest for barcodings, anticounterfeiting technologies and (re)writable devices.

中文翻译：

具有近红外诱导荧光调制的固体材料

固体分子材料在辐照时调节其发光性能通常基于光致变色染料。尽管这些在防伪，生物成像，光学数据存储和可写/可擦除设备等应用中可能引起人们的兴趣，但其主要功能却阻止了它们在市售产品中的使用：缺乏获得近红外（NIR）辐射响应光致变色染料的直接策略以及这些分子在固体中遭受的巨大反应修饰。在此，据报道，无光铬方法可实现通过NIR辐射诱导其发光调制的固体材料。该策略基于相变材料（PCM）在光热诱导的固态和液态之间相互转换时修改荧光染料的发射特性的能力。说明了几种具有高耐疲劳性和无损读出的近红外响应热荧光染料的制备，并且该方法利用独特的荧光调制机制扩展到了不同的市售染料，从而提供了颜色可调性。通过简单地改变辐照功率密度，金纳米壳浓度和/或PCM类型即可直接调节调制响应。这种可调性可以完成NIR活化的多态热致变色材料，并在具有良好空间分辨率的NIR书写/绘图中实现快速/缓慢/不可逆的响应，

更新日期：2020-11-04

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