期刊
CHINESE JOURNAL OF CHEMISTRY
卷 40, 期 3, 页码 337-342出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cjoc.202100668
关键词
Dyes; pigments; Fluorescence; Gels; Information encryption; Stimuli responsiveness
资金
- National Natural Science Foundation of China [52103246, 51873223, 51773215, 21774138]
- National Key Research and Development Program of China [2018YFC0114900, 2018YFB1105100]
- China Postdoctoral Science Foundation [2020M671828, 2021TQ0341]
- Natural Science Foundation of Ningbo [202003N4361, 2021J203]
- Key Research Program of Frontier Science, Chinese Academy of Sciences [QYZDB-SSW-SLH036]
- Sino-German Mobility Program [M-0424]
- K. C. Wong Education Foundation [GJTD-2019-13]
- Medical and Health Research Project of Zhejiang Province [2021429693]
In this study, a smart fluorescent organohydrogel was fabricated, which can achieve dynamic color variation and has a higher level of anti-counterfeiting security. By adjusting the composition of the materials, various organohydrogels with different properties can be obtained, serving as an effective platform for encrypting and decrypting secret information.
Comprehensive Summary Smart fluorescent patterns enable dynamic color variation under external stimuli, showing a much higher security level in the field of anti-counterfeiting. However, there is still lacking of a simple and convenient way to achieve dynamic fluorescence changes. Herein, a fluorescent organohydrogel made up of a poly(N,N-dimethylacrylamide-co-isopropylacrylamide) (p(DMA-NIPAM)) hydrogel network and a poly(lauryl methacrylate) (PLMA) organogel network was fabricated via a two-step interpenetrating technique. The former network bears naphthalimide moieties (DEAN, green fluorescent monomer) and the later contains 6-acrylamidopicolinic acid (6APA, fluorescent ligand), leading to emitting green fluorescence. When Eu3+ was introduced and coordinated with 6APA, the organohydrogel displays red fluorescence, which can further emit yellow after applying thermal stimulus. Furthermore, by adjusting the proportion of comonomers, various organohydrogels can be obtained, which can be programmed and act as an effective platform for the encryption and decryption of secret information.
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