A time-encoded fluorescent Eu-containing polyoxometalate assemblies for logic gate and information encryption

The dynamic control of fluorescence intensity in a time-dependent manner is crucial for enhancing the complexity of dynamic information encryption. In this study, we introduce a new system that combines a pH-responsive microgel with a non-equilibrium Eu-containing polyoxometalate. This system is created through dissipative self-assembly based on urease, enabling precise regulation of fluorescence intensity on a time scale. This intelligent fluorescent system exhibits potential applications in fluorescent ink, enzymatic logic gate and information encryption. Moreover, by simply manipulating the concentration of urease, the lifetime of encoded information can be accurately regulated. These time-encoding characteristics endow Eu-containing polyoxometalate with significant potential for advanced information encryption and data storage.