Dynamically Securing the Data by^(1)O_(2)Sensitization of Fluorescent Composites with a High Latency and Uncrackable Features  

作　　者：Yuanyuan Chen Jiamao Chen Huacan Wu Yifan Liu Donghui Wang Weiguo Huang 

机构地区：[1]College of Chemistry and Materials Science,Fujian Normal University,Fuzhou,Fujian,350002 China [2]State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,155 Yangqiao West Road,Fuzhou,Fujian,350002 China [3]University of Chinese Academy of Sciences,19A Yuquan Road,Beijing,100049 China

出　　处：《Chinese Journal of Chemistry》2024年第14期1651-1658,共8页中国化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(22275193 and 52303355);the Natural Science Foundation of Fujian Province(2021J06034);Self-deployment Project Research Program of Haixi Institutes,Chinese Academy of Science,CXZX-2022-GH09(E255KF0101);Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences(E055AJ01);the STS Project of Fujian-CAS(Grant No.:2023T3027).

摘　　要：Dynamic fluorescent materials play a crucial role in secure inks for data encryption;however,they are still plagued by issues such as photodegradation,poor latency,and susceptibility to unauthorized access.Herein,we propose a photochemically modulated dynamic fluorescent encryption system based on^(1)O_(2)sensitization of fluorescent composites,comprising a^(1)O_(2)-sensitive fluorophore(F2)and non-emissive polymers.After UV irradiation,in-situ generated^(1)O_(2)from the polymer effectively binds with F2 to form endoperoxides(F2EPO),resulting in a significant redshift in emission,up to 150 nm.The^(1)O_(2)concentration is closely related to the irradiation time,rendering different fluorescent colors in a time-gated fashion.Moreover,the emission of F2EPO can be regulated by polymer chemical structure,molecular weight,and crosslinking density.Relying on these merits,we develop a dynamic data encryption method with various non-emissive polymers as the data storage media,UV light irradiation as the data encoder,and F2 as the data decoder.UV light irradiation of diverse polymer solutions generates^(1)O_(2)at different concentrations,effectively encoding the data,which remains invisible under both UV and natural lights.The addition of F2 to these irradiated polymer solutions produces different redshifted fluorescence,enabling secure data decryption.Attributing to the non-emissive nature of the polymers,time-gated readout fashion,excellent latency of^(1)O_(2),and subtle interactions between^(1)O_(2)and F2,this data encryption is nearly undecipherable.This work offers an advantage data encryption approach beyond the reach of conventional fluorophores.

关 键 词：Dynamic fluorescent materials Photochemically modulation ^(1)O_(2)-sensitive fluorophore High latency Data encryption Fluorescence PHOTOCHEMISTRY Singlet oxygen 

分 类 号：O657.3[理学—分析化学] TB33[理学—化学]