Unclonable Chameleon Security Inks

镧系配合物由于其独特而强大的光物理特性而被广泛应用于发光安全油墨中，并且它们也很容易被设计成圆偏振发光（CPL）。然而，手性CPL信号尚未被用作先进安全油墨的手段。直到我们最近在CPL测量技术上取得突破，实现了快速、高通量、安全的油墨验证，用于测量CPL的技术一直有些停滞不前。项目描述该项目的合成方面致力于开发混合聚合物封装有机发射器和手性Ln（III）配合物，以创建多层不可克隆的QR码图案。作为项目的一部分，将合成具有累积专业知识的新型cpll活性Ln（III）配合物，以最大化宝石和增加CPB （CPL亮度）。利用商业上可获得的聚合物基质，这种基质已经或将适用于现代“塑料”钞票，作为透明层，光刻手性分离器可以与发光染料配方一起嵌入到钞票中。因此，使用手持式时间分辨探测器，也是该项目的一部分，使用新型偏振Thor实验室相机，“秘密蚀刻偏振器”（大本钟的结构是完美的）与独特的染料混合物配方相结合，可以产生独特的指纹三色安全染料，其中包含3个触觉QR码。将该分离器单元简单地折叠到紫外线照射的钞票上，将导致安全染料的颜色变化，通过时间门控将红色铕成分（独特的手性/光谱指纹和毫秒寿命）从短寿命（ns）有机绿色或蓝色荧光团中分离出来，可以进一步改变为第三种隐藏颜色。这些组合是前所未有的，产生了5层不可克隆的隐藏（肉眼看不见）安全功能。因此，该项目结合了聚合物科学，光刻和有机和手性镧系化合物的染料配方，使其成为一个真正的多学科研究项目。我们新开发的全固态（SS-）CPL光谱仪是CPL光谱的典范转变，使全球研究界和公众能够利用迄今为止未知的CPL优势。这使得这个独特的平台非常受任何对全球商业认证和保护感兴趣的第三方的欢迎。一旦一种合适的染料，将有机短寿命荧光绿色/蓝色发射体与手性（CPL活性）红/绿（铽/铕）长寿命发射体结合在一起，并作为薄层嵌入透明聚合物基质中，就有无限的可能性来创建无限数量的5层安全QR码和认证印章/标识，从而书写智能不可克隆安全认证的下一章。

Project BackgroundLanthanide complexes are widely used in luminescent security inks due to their unique and robust photo-physical properties and they can also easily be engineered to undergo circularly polarised luminescence (CPL). However, chiral CPL signals have not yet been exploited as means in advanced security inks. Until our recent break-through in CPL measurement technology that enables rapid, high-throughput, security ink verification, the technology used to measure CPL has been somewhat stagnant. Project DescriptionThe synthetic aspect of this project is dedicated to develop blended polymer encapsulated organic emitters and chiral Ln(III)complexes to create multi-layered unclonable QR code patterns. Novel CPL-active Ln(III) complexes with cumulative expertise based strategies to maximise gem and increase CPB (CPL brightness) will be synthesized as part of the project. Using a commercially available polymer matrix that is already part or will be suitable to be incorporated into modern 'plastic' banknotes as a transparent layer a lithographically etched chiral separator can be embedded into the banknote alongside the luminescent dye formula. Therefore, using a handheld time resolved detector, also developed as part of this project using a novel polarized Thor labs camera, and the 'secret etched polarizer' (the structure of the Big Ben is perfect) in combination with a unique dye mixture formula can result in a unique fingerprint tri-colour security dye encoding 3 chiroptical QR codes in one. A simple fold over of this separator unit onto the UV illuminated banknote will result in colour change of the security dye that can further be changed to a third hidden colour by time gating the red Europium component (unique chiral/spectral fingerprint and ms lifetime) separating it from the short lived (ns) organic green or blue fluorophores. These combined are unprecedented, resulting in 5 tiers of unclonable hidden (invisible to the naked eye) security feature. This project therefore combines polymer science, lithography and dye formulation of organic and chiral lanthanide emitters rendering it to be a truly multidisciplinary research project.Our newly developed all solid-state (SS-)CPL spectrometer is a paradigm shift in CPL spectroscopy and allows the global research community and the public to harness the so far uncharted benefits of CPL. This renders this unique platform extremely desirable by any third party interested in authentication and protection of global commerce.Once a suitable dye, combining organic short-lived fluorescence green/blue emitters with chiral (CPL active) red/green (Terbium/Europium) long-lived emitters is formulated and embedded into transparent polymer matrix as a thin layer the possibilities are endless to create infinite number of 5 layer security QR codes and authentication stamps/logos allowing the next chapter of intelligent unclonable security authentication to be written.