Conversion of invisible metal-organic frameworks to luminescent perovskite nanocrystals for confidential information encryption and decryption

Nature Communications
Congyang ZhangLiang Li

Abstract

Traditional smart fluorescent materials, which have been attracting increasing interest for security protection, are usually visible under either ambient or UV light, making them adverse to the potential application of confidential information protection. Herein, we report an approach to realize confidential information protection and storage based on the conversion of lead-based metal-organic frameworks (MOFs) to luminescent perovskite nanocrystals (NCs). Owing to the invisible and controlled printable characteristics of lead-based MOFs, confidential information can be recorded and encrypted by MOF patterns, which cannot be read through common decryption methods. Through our conversion strategy, highly luminescent perovskite NCs can be formed quickly and simply by using a halide salt trigger that reacts with the MOF, thus promoting effective information decryption. Finally, through polar solvents impregnation and halide salt conversion, the luminescence of the perovskite NCs can be quenched and recovered, leading to reversible on/off switching of the luminescence signal for multiple information encryption and decryption processes.

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Citations

Jul 27, 2018·Chemical Society Reviews·Yuanjing CuiGuodong Qian
Feb 12, 2019·Angewandte Chemie·Debabrata SamantaTapas Kumar Maji
May 3, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Shaowen XieJie Zheng
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Jan 15, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Jin-Ping GaoXian-Ming Zhang
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Apr 21, 2021·ACS Applied Materials & Interfaces·Yunhuan YuanWeiwei Zhao
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May 18, 2021·Chemical Science·Loredana ProtesescuMircea Dincă
Jun 12, 2021·Nature Communications·Zhifang ShiQixi Mi

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Methods Mentioned

BETA
transmission
scanning electron microscopy
transmission electron microscopy
X-ray
Fluorescence

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