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Searching for catalysts that are cost-effective, efficient, recyclable and capable of harvesting light for aerobic oxidation reactions remains a challenge for material scientists. Herein, we have designed and developed a task-specified heterogeneous photocatalyst, which was built by a two-step reaction starting from a commercially available compound named benzo[1,2b:4,5-b'] dithiophene-4,8-dione (BDD). Through the molecular engineering strategy integrating an electron-output BDD, the obtained BDD-based conjugated microporous polymer (CMP-BDD) exhibits efficient visible light absorption due to the incorporation of a BDD moiety and an extended π-conjugated structure. Remarkably, the CMP-BDD showed an effective heterogeneous catalytic activity for typical oxidative organic transformations, such as selective oxidation of organic sulfides, and thiocyanation of imidazoheterocycles in the presence of light and oxygen. In addition, the CMP-BDD exhibited good recyclability in the photocatalytic oxidation of thioanisole, which can be used for at least five times without substantial decline in photocatalytic activity, demonstrating its promising potential in industrial applications.

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Although considerable efforts have been devoted to novel ionic porous networks (IPNs), the development of them in a scalable manner to tackle the issues in pollutant treatment by adsorption remains an imminent challenge. Herein, inspired by natural spider webs, a knitting copolymerization strategy is proposed to construct analogue triazolium salt‐based porous networks (IPN‐CSUs). It is not only convenient to incorporate the cationic motifs into the network, but easy to control over the contents of ionic pairs. The as‐prepared IPN‐CSUs displays a high surface area of 924 m2 g−1, a large pore volume of 1.27 cm3 g−1 and abundant ionic sites, thereby exhibiting fast adsorption rate and high adsorption capacity towards organic and inorganic pollutants. The kinetics and thermodynamics study reveal that the adsorption followed a pseudo‐second‐order kinetic model and Langmuir isotherm model correspondingly. Specifically, the maximum adsorption capacity of the IPN‐CSUs is as high as 1.82 mg mg−1 for permanganate ions and up to 0.54 mg mg−1 for methyl orange, which stands out among the previously reported porous adsorbents so far. It is expected that the strategy reported herein can be extended to the development of other potential efficient adsorbents in water purifications.

Facile preparation of ionic porous networks (IPNs) with a large and permanent porosity is highly desirable for CO2 capture and transformation, which remains a challenge. Here we report a one-pot...