Zhang Yongfeng, Wang Zhonghao, Su Yan, Zheng Yan, Tang Wenji, Yang Chaolong, Tang Hailong, Qu Lunjun, Li Youbing, Zhao Yanli
School of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China.
Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371.
Research (Wash D C). 2021 Feb 16;2021:8096263. doi: 10.34133/2021/8096263. eCollection 2021.
Developing novel long-lived room-temperature polymer phosphorescence (RTPP) materials could significantly expand their application scope. Herein, a series of RTPP materials based on eight simple vanilla derivatives for security ink application are reported. Attributed to strong mutual hydrogen bonding with polyvinyl alcohol (PVA) matrix, vanilla-doped PVA films exhibit ultralong phosphorescence emission under ambient conditions observed by naked eyes, where methyl vanillate shows the longest emission time up to 7 s. Impressively, when vanilla-doped PVA materials are utilized as invisible security inks, and the inks not only present excellent luminescent emission stability under ambient conditions but also maintain perfect reversibility between room temperature and 65°C for multiple cycles. Owing to the unique RTPP performance, an advanced anticounterfeiting data encoding/reading strategy based on handwriting technology and complex pattern steganography is developed.
开发新型长寿命室温聚合物磷光（RTPP）材料可显著扩大其应用范围。在此，报道了一系列基于八种简单香草衍生物的用于防伪油墨应用的RTPP材料。由于与聚乙烯醇（PVA）基质形成强相互氢键，香草掺杂的PVA薄膜在肉眼可观察的环境条件下表现出超长磷光发射，其中香草酸甲酯的发射时间最长可达7秒。令人印象深刻的是，当香草掺杂的PVA材料用作隐形防伪油墨时，这些油墨不仅在环境条件下具有出色的发光发射稳定性，而且在室温至65°C之间多次循环时保持完美的可逆性。由于独特的RTPP性能，开发了一种基于手写技术和复杂图案隐写术的先进防伪数据编码/读取策略。
