Dynamically Securing the Data by 1O2 Sensitization of Fluorescent
Composites with A High Latency and Uncrackable Features
Abstract
Dynamic fluorescent materials used in data encryption suffer from
photodegradation, poor latency, and susceptibility to unauthorized
access. Herein, we propose a photochemically modulated dynamic
fluorescent encryption system based on 1O2 sensitization of fluorescent
composites, comprising a 1O2-sensitive fluorophore (F2) and non-emissive
polymers. After UV irradiation, in-situ generation of 1O2 from the
polymer effectively binds with F2 to form endoperoxides (F2EPO),
resulting in a significant redshift in emission, up to 150 nm. The 1O2
concentration is closely related to the irradiation time, enabling
time-gated encryption with diverse fluorescent colors. Moreover, polymer
properties can be manipulated to further regulate F2EPO emission.
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 1O2 at different
concentrations, effectively encoding the data, which remains invisible
under both UV and natural lights. The addition of F2 to these irradiated
polymer produces different redshifted fluorescence, enabling secure data
decryption. Attributing to the non-emissive polymers, time-gated readout
fashion, excellent latency of 1O2, and subtle interactions between 1O2
and F2, this data encryption is nearly undecipherable.