Abstract

AbstractA synthetic and modification method to obtain water‐compatible, visible‐light‐active, conjugated, microporous polyazulene networks as pure organic, highly stable, reusable, and heterogeneous photocatalysts in aqueous medium by a simple protonation method was investigated. The water compatibility and photocatalytic activity of the hydrophilic polyazulenes were demonstrated in the photoreduction reaction of CrVI to CrIII for heavy‐metal‐contaminated waste‐water treatment. Furthermore, a light‐induced cascade reaction mechanism with the use of additional abundant metal cations such as FeIII or CuII as co‐catalysts was also described. This design strategy could offer a clean and cost‐effective solution to obtain water‐compatible, pure organic, photoactive polymers with a broader potential for other applications in aqueous media under sustainable and environmentally friendly conditions.

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