Abstract
Innovative fluorescence security technologies for paper-based information are still highly pursued nowadays because data leakage and indelibility have become serious economic and social problems. Herein, we report a novel transient bio-fluorochromic supramolecular co-assembly mediated by a hydrolytic enzyme (ALP: alkaline phosphatase) towards rewritable security printing. A co-assembly based on the designed tetrabranched cationic diethynylanthracene monomer tends to be formed by adding adenosine triphosphate (ATP) as the biofuel. The resulting co-assembly possesses a time-encoded bio-fluorochromic feature, upon successively hydrolyzing ATP with ALP and re-adding new batches of ATP. On this basis, the dynamic fluorescent properties of this time-encoded co-assembly system have been successfully enabled in rewritable security patterns via an inkjet printing technique, providing fascinating potential for fluorescence security materials with a biomimetic mode.
Highlights
Paper document security is of paramount importance even in the electronic information world, because the widespread medium for documentation is still paper.[1,2,3,4,5,6,7] Developing innovative con dentiality methods for genuine documents is in great demand.[8,9,10] In this respect, researchers are interested in utilizing uorescent security inks to achieve this goal, because of their visibility only under UV light.[11,12,13,14,15] most of the reported uorescent inks are poor in complexity and tunability, which are relatively easy to replicate
A co-assembly based on the designed tetrabranched cationic diethynylanthracene monomer tends to be formed by adding adenosine triphosphate (ATP) as the biofuel
The structure of desired monomer 1 is shown in Fig. 1, which contains two sets of symmetrical propyl ammonium salt groups that are linked to the periphery of the 9,10-bis(phenylethynyl) anthracene unit via amide bonds
Summary
Paper document security is of paramount importance even in the electronic information world, because the widespread medium for documentation is still paper.[1,2,3,4,5,6,7] Developing innovative con dentiality methods for genuine documents is in great demand.[8,9,10] In this respect, researchers are interested in utilizing uorescent security inks to achieve this goal, because of their visibility only under UV light.[11,12,13,14,15] most of the reported uorescent inks are poor in complexity and tunability, which are relatively easy to replicate. Zhao Gao,a Shuai Qiu,a Fei Yan,a Shuyi Zhang,a Feng Wang b and Wei Tian *a We report a novel transient bio-fluorochromic supramolecular co-assembly mediated by a hydrolytic enzyme (ALP: alkaline phosphatase) towards rewritable security printing.
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