The development of advanced materials for information encryption with time-dependent features is essential to meet the increasing demand on encryption security. Here, the information encryption materials are developed based on pyrene-based multicolour fluorescence supramolecular systems with time-dependent dynamic fluorescent signals. Time-dependent fluorescence is achieved by controlling the transient supramolecular assembly of pyrene derivatives or the polymer network. By taking advantage of the tuneable fluorescence, time-dependent information encryption materials are developed, showing multiple pieces of information on a time scale, and the correct information can be identified only at a specified time. This work provides an inspiring point for the design of information encryption materials with higher security requirements.

Pyrene-based dynamic fluorescent system for information encryption

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