An aggregation-induced emission (AIE) based smart singlet oxygen (O) generation system has been successfully fabricated based on supramolecular host-guest assembly. The controllable O generation can be achieved by conveniently changing the molar ratio between the macrocyclic host (WP5) and the guest molecule (TPEPY). Moreover, reversible control of O generation and fluorescence emission of supramolecular nanoassemblies can be achieved via adding Fe and EDTA, which allows qualitatively monitoring the singlet oxygen generation efficiency by the naked eye.
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