Wu Zhiwei, Yu Weiqin, Luo Fenghao, Jin Yue, Pan Ligou, Deng Qianjun, Wang Qing, Yu Mingguang
Guangdong Key Laboratory for Hydrogen Energy Technologies, Key Laboratory of Digital Decorative Materials for Building Ceramics in Guangdong Province, School of Materials and Energy, Foshan University, Foshan 528000, China.
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China.
Molecules. 2024 Dec 11;29(24):5852. doi: 10.3390/molecules29245852.
Traditional organic light-emitting materials hinder their anti-counterfeiting application in solid state due to their aggregation-caused quenching effect. A facile and straightforward method was reported to introduce AIE molecules into microspheres and manipulate different reaction parameters to prepare AIE microspheres with different morphologies. In this strategy, fluorescent microspheres with spherical, apple-shaped, and hemoglobin-like types were synthesized. Driven by the photocyclization and oxidation of tetraphenylethene, microspheres can be used as an aqueous fluorescence ink with erasable properties. The fluorescent patterns printed by microsphere ink on paper can be irreversibly erased by prolonged exposure to ultraviolet light (365 nm, 60 mw/cm). Moreover, the multi-morphology microspheres can be further arranged for multiple-information encryption and anti-counterfeiting of barcodes and two-dimensional codes, in which double validation was carried out through fluorescence spectroscopy and laser confocal microscopy. This approach provides a new method for more reliable anti-counterfeiting and information encryption.
传统的有机发光材料由于其聚集诱导猝灭效应，阻碍了它们在固态中的防伪应用。据报道，一种简便直接的方法是将聚集诱导发光（AIE）分子引入微球中，并控制不同的反应参数来制备具有不同形态的AIE微球。在该策略中，合成了球形、苹果形和血红蛋白样的荧光微球。在四苯乙烯的光环化和氧化作用下，微球可用作具有可擦除特性的水性荧光油墨。微球油墨在纸上打印的荧光图案通过长时间暴露于紫外光（365nm，60mw/cm）可被不可逆地擦除。此外，多形态微球可进一步用于条形码和二维码的多重信息加密与防伪，其中通过荧光光谱和激光共聚焦显微镜进行双重验证。这种方法为更可靠的防伪和信息加密提供了一种新方法。
