Dual Channel of Time-Coded Fluorescence Materials Constructed by Europium-Dynamic Covalent Surfactant and Carbon...

With the increasingly prominent role of information security in data confidentiality, a variety of information encryption strategies have emerged. Herein, a dual-channel information encryption strategy based on lanthanide ions and carbon quantum dots (CQDs) is proposed, which significantly enhances the security of information encryption. In this system, a luminescent lanthanide material is prepared through lanthanide ions and dynamic covalent bond surfactants. With further introduction of CQDs, the significant difference in excitation wavelengths between lanthanide ions and CQDs (365 nm for CQDs and 254 nm for Eu³⁺/Tb³⁺) enables the realization of excitation wavelength-channel information encryption. Owing to the chemical reaction and coordination effects at specific pH levels regulated by the hydrolysis time of d-(+)-gluconic acid δ-lactone (δ-GL), the fluorescence intensity exhibits time-dependent tunability, thus achieving the time-gated channel information encryption strategy. Decryption requires the simultaneous acquisition of wavelength and time keys, providing a novel strategy for the development of intelligent and high-security dynamic encryption materials.