Guanosine-Based Supramolecular Hydrogels with Dynamic Time-Dependent Fluorescence for Information Encryption

Dynamic time-dependent fluorescent encrypted hydrogelsprovidea highly secure and sophisticated information security strategy. However,challenges still remain in developing new green encrypted hydrogelswith simple preparation. Herein, a new series of guanosine (G)-basedsupramolecular hydrogels with dynamic time-dependent fluorescencerather than traditional fluorescent materials are exquisitely constructedvia a one-pot reaction for the first time. Typically, their fluorescenceintensity and wavelength can gradually change with the time dimensionof more than 1 year, showing promising potential in information encryption-decryption-destruction.A detailed timescale structure characterization combined with thetransition-state analysis of the self-assembly process revealed thatthe G-quartet-based self-assembly in hydrogels has significant endogenousdynamics, which further affects gelation and time-dependent fluorescencethrough the self-assembly rate. Further combined with the excellentshear thinning, self-healing, and metal ion response properties, thewriting, storage, reading, and & DPRIME;burning after reading & DPRIME;of information can be successfully realized in a long-term dimension.Therefore, this study illustrates that the ingenious use of functionalsupramolecular self-assembly building blocks will be a useful strategyfor the development of dynamic time-dependent fluorescent encryptedhydrogels.