Realizing high hydrogen evolution activity under visible light using narrow band gap organic photocatalysts

摘要: The design and synthesis of conjugated semiconducting polymers for photocatalytic hydrogen evolution have engendered intense recent interest. However, most reported organic polymer photocatalysts show a relatively broad band gap with weak light absorption ability in the visible region, which commonly leads to low activity under light. Herein, we synthesize three novel dithieno[3,2-b:2′,3′-d]thiophene-S,S-dioxide (DTDO) containing by facile C–H arylation coupling polymerization reaction. resulting range up 700 nm narrow down 1.81 eV due introduction DTDO unit. Benefiting from donor–acceptor structure high content unit, three-dimensional PyDTDO-3 without addition Pt co-catalyst shows an attractive rate 16.32 mmol h−1 g−1 irradiation, is much higher than that