荧光
尿素酶
化学
自愈水凝胶
尿素
水溶液中的金属离子
纳米技术
金属
组合化学
材料科学
生物化学
计算机科学
高分子化学
有机化学
量子力学
物理
作者
Xiaoxia Le,Hui Shang,Yan Huang,Jiawei Zhang,Wei Lü,Mingjie Liu,Liping Wang,Guangming Lu,Qunji Xue,Tao Chen
标识
DOI:10.1002/anie.202011645
摘要
Abstract The improper handling of decrypted information can lead to the leakage of confidential data. Thus, there is increasing interest in the development of self‐erasing decrypted data. Herein, we report a urease‐containing fluorescent hydrogel for multistage information security protection. Information can be input into the fluorescent hydrogel, which is based on the protonated 4‐(N,N‐dimethylaminoethylene) amino‐N‐allyl‐1,8‐naphthalimide (DEAN‐H + ) and doped with urease, using metal ions, such as Zn 2+ that coordinate with DEAN. Upon exposure to urea, urease produces NH 3 , which reduces the fluorescence of the hydrogel. In the presence of urea, metal‐coordinated hydrogel fluorescence decreases more slowly than the fluorescence of the hydrogel alone, revealing the information. The displayed information is then automatically erased within a few minutes. This work opens up a new insights in designing and fabricating information storage materials.
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