Thieno[3,4-c][1,2,5]Thiadiazole-Based Organic Conjugated Molecules with Visible and Near-Infrared Dual Emissions for Luminescent Anti-Counterfeiting Applications,Advanced Functional Materials

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Thieno[3,4-c][1,2,5]Thiadiazole-Based Organic Conjugated Molecules with Visible and Near-Infrared Dual Emissions for Luminescent Anti-Counterfeiting Applications
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-07-21 , DOI: 10.1002/adfm.202205494
Yufeng Li ₁ , Jiangman Sun ₁ , Mingxing Chen ₂ , Shushu Miao ₁ , Ming Liu ₁ , Yongjie Ma ₁ , Guan Wang ₁ , Xinggui Gu _{1,

3} , Ben Zhong Tang ₄

Affiliation

Luminescence materials have gained extensive attention in anti-counterfeiting owing to their unique superiorities. Visible-near infrared (vis-NIR) dual emission that combines naked-eye visible light and concealed NIR light would provide a promising strategy for improving the covertness and secure anti-counterfeiting effect. Here, two organic conjugated materials 4,4′-(thieno[3,4-c][1,2,5]thiadiazole-4,6 diyl)bis(N,N-bis(4-(aldehyde)phenyl)aniline) (TTD-TPA-CHO) and 4,4′-(thieno[3,4-c][1,2,5]thiadiazole-4,6 diyl)bis(N,N-bis(phenyl)aniline) (TTD-TPA) based on thieno[3,4-c][1,2,5]thiadiazole (TT) have been developed, exhibiting vis-NIR dual emissions by manipulating the charge transfer states. With the aid of self-healing technique, stretchable and highly transparent TTD-TPA-CHO and TTD-TPA containing self-healing PDMS films are efficiently prepared to fabricate dual-mode anti-counterfeiting patterns for demonstrating the anti-counterfeiting applications. Under UV light, the luminescent patterns in visible region can be read out by the naked eye, while the concealed information could be accessed by NIR detection devices. These results evidently suggest the important role of vis-NIR dual emission in enhancing the stealth of encrypted information and the security level of anti-counterfeiting. Hopefully, this work would promote the further development of vis-NIR dual-emission organic conjugated materials in anti-counterfeiting techniques.

中文翻译：

Thieno[3,4-c][1,2,5]噻二唑基有机共轭分子具有可见和近红外双重发射，用于发光防伪应用

发光材料以其独特的优势在防伪领域受到广泛关注。结合裸眼可见光和隐藏式近红外光的可见-近红外（vis-NIR）双发射将为提高隐蔽性和安全防伪效果提供有希望的策略。这里，两种有机共轭材料 4,4'-(thieno[3,4-c][1,2,5]thiadiazole-4,6 diyl)bis(N,N-bis(4-(aldehyde)phenyl)aniline ) (TTD-TPA-CHO) 和 4,4'-(thieno[3,4-c][1,2,5]thiadiazole-4,6 diyl)bis(N,N-bis(phenyl)aniline) (基于噻吩并[3,4-c][1,2,5]噻二唑（TT）的TTD-TPA）已经被开发出来，通过操纵电荷转移状态表现出vis-NIR双发射。借助自愈技术，可拉伸且高度透明的 TTD-TPA-CHO 和 TTD-TPA 含有自修复 PDMS 薄膜，可有效制备双模防伪图案，以展示防伪应用。在紫外光下，可见光区的发光图案可以用肉眼读出，而隐藏的信息可以通过近红外探测装置获取。这些结果清楚地表明了vis-NIR双重发射在增强加密信息的隐蔽性和防伪安全级别方面的重要作用。希望这项工作能够促进可见近红外双发射有机共轭材料在防伪技术中的进一步发展。可见区域的发光图案可以用肉眼读取，而隐藏的信息可以通过近红外检测设备获取。这些结果清楚地表明了vis-NIR双重发射在增强加密信息的隐蔽性和防伪安全级别方面的重要作用。希望这项工作能够促进可见近红外双发射有机共轭材料在防伪技术中的进一步发展。可见区域的发光图案可以用肉眼读取，而隐藏的信息可以通过近红外检测设备获取。这些结果清楚地表明了vis-NIR双重发射在增强加密信息的隐蔽性和防伪安全级别方面的重要作用。希望这项工作能够促进可见近红外双发射有机共轭材料在防伪技术中的进一步发展。

更新日期：2022-07-21

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