Again, the fluorescence after the first UV/blue cycle was less than in the initial solution (Figure ) due to a lower fraction of trans-AzoDiGua in the photostationary state compared to the pure trans solution before irradiation. By exploiting the co-assembly between ATP and AzoDiGua, we could achieve both photoswitchable and aggregation-induced fluorescence of ATP/AzoDiGua aggregates leading to, the best of our knowledge, the first photoswitchable micro-meter sized ATP-based assembly.