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<p>Two donor–acceptor (D-A)-type conjugated microporous polymers (CMPs), TT-PA and TT-BPA, are successfully synthesized based on thiazolo[5,4-<i>d</i>]thiazole (TzTz) as the acceptor unit. The rigid planar structure of TzTz enables close and effective π-π stacking between polymer layers, which benefits interlayer charge transport and enhances photocatalytic performance. The high density of S and N atoms in the TzTz units can act as Lewis base sites to adsorb O<sub>2</sub> molecules. Subsequently, TzTz transfers the photogenerated electrons to the adsorbed O<sub>2</sub>, generating ·O<sub>2</sub><sup>−</sup>, which facilitates the 2e<sup>−</sup>oxygen reduction reaction (ORR) pathway for the photocatalytic production of H<sub>2</sub>O<sub>2</sub> and the degradation of the pollutant Rhodamine B (RhB). PL, EIS and photocurrent data indicate that TT-PA has a lower charge recombination rate and higher charge separation efficiency, stemming from the appropriate size and electron-withdrawing ability of triphenylamine. Therefore, the combination of TzTz and triphenylamine in TT-PA represents the “golden combination” for achieving the best D-A effect, pore structure and photocatalytic performance due to the optimal D/A ratio. This study provides insights into the design of CMP photocatalysts.</p>

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Thiazolo[5,4-d]thiazole-based CMPs as bifunctional photocatalysts for H2O2 production and organic pollutant degradation

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • Yuting Ren,
  • Mingyue Wang,
  • Shuangjie Zhang,
  • Chunhua Yuan,
  • Jianmei Zhou,
  • Dongmei Li,
  • Zhongzhen Tian

摘要

Two donor–acceptor (D-A)-type conjugated microporous polymers (CMPs), TT-PA and TT-BPA, are successfully synthesized based on thiazolo[5,4-d]thiazole (TzTz) as the acceptor unit. The rigid planar structure of TzTz enables close and effective π-π stacking between polymer layers, which benefits interlayer charge transport and enhances photocatalytic performance. The high density of S and N atoms in the TzTz units can act as Lewis base sites to adsorb O2 molecules. Subsequently, TzTz transfers the photogenerated electrons to the adsorbed O2, generating ·O2−, which facilitates the 2e−oxygen reduction reaction (ORR) pathway for the photocatalytic production of H2O2 and the degradation of the pollutant Rhodamine B (RhB). PL, EIS and photocurrent data indicate that TT-PA has a lower charge recombination rate and higher charge separation efficiency, stemming from the appropriate size and electron-withdrawing ability of triphenylamine. Therefore, the combination of TzTz and triphenylamine in TT-PA represents the “golden combination” for achieving the best D-A effect, pore structure and photocatalytic performance due to the optimal D/A ratio. This study provides insights into the design of CMP photocatalysts.