Photoactive conjugated microporous polymers (CMPs) as heterogeneous photocatalysts provide a sustainable alternative to classical metal-based semiconductor photosensitizers. However, previously reported CMPs are typically synthesized through metal catalyzed coupling reactions, which bears product separation, but also increases the price of materials. Herein, a new type of sp² carbon linked DCM-CMPs are successfully designed and synthesized by organic base catalyzed Knoevenagel reaction using 2,6-Dimethyl-4H-pyran-4-ylidene-malononitrile and aromatic polyaldehydes as monomers. The new polymers feature inherent porosity, excellent stability, and fully π-conjugated skeleton with broad visible-light absorption. They effectively induce the synthesis of benzimidazole compounds under light irradiation, and exhibit wide substrate adaptability with outstanding recyclability.

中文翻译：

---

2-吡喃-4-亚基丙二腈基共轭微孔聚合物作为有机合成用无金属多相光催化剂


光活性共轭微孔聚合物（CMP）作为异质光催化剂，为传统金属基半导体光敏剂提供了可持续的替代品。然而，先前报道的CMP通常是通过金属催化的偶联反应合成的，这会带来产物分离的问题，但也增加了材料的价格。在此，以2,6-二甲基-4H-吡喃-4-亚基-丙二腈和芳香族多醛为原料，通过有机碱催化Knoevenagel反应，成功设计并合成了一种新型sp ² 碳连接的DCM-CMPs。单体。新型聚合物具有固有的孔隙率、优异的稳定性和具有广泛可见光吸收的全π共轭骨架。它们在光照射下有效诱导苯并咪唑化合物的合成，并表现出广泛的底物适应性和出色的可回收性。