Covalent Triazine Framework Nanoparticles via Size-Controllable Confinement Synthesis for Enhanced Visible-Light Photoredox Catalysis.,Angewandte Chemie International Edition

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Covalent Triazine Framework Nanoparticles via Size-Controllable Confinement Synthesis for Enhanced Visible-Light Photoredox Catalysis.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-07-22 , DOI: 10.1002/anie.202007358
Wei Huang ₁ , Niklas Huber ₁ , Shuai Jiang ₁ , Katharina Landfester ₁ , Kai A I Zhang _{1,

2}

Affiliation

For metal‐free, organic conjugated polymer‐based photocatalysts, synthesis of defined nanostructures is still highly challenging. Here, we report the formation of covalent triazine framework (CTF) nanoparticles via a size‐controllable confined polymerization strategy. The uniform CTF nanoparticles exhibited significantly enhanced activity in the photocatalytic formation of dibenzofurans compared to the irregular bulk material. The optoelectronic properties of the nanometer‐sized CTFs could be easily tuned by copolymerizing small amounts of benzothiadiazole into the conjugated molecular network. This optimization of electronic properties led to a further increase in observed photocatalytic efficiency, resulting in total an 18‐fold enhancement compared to the bulk material. Full recyclability of the heterogeneous photocatalysts as well as catalytic activity in dehalogenation, hydroxylation and benzoimidazole formation reactions demonstrated the utility of the designed materials.

中文翻译：

通过尺寸可控限制合成共价三嗪框架纳米颗粒增强可见光光氧化还原催化。

对于不含金属的有机共轭聚合物光催化剂，合成特定的纳米结构仍然具有很大的挑战性。在这里，我们报告了通过尺寸可控的受限聚合策略形成共价三嗪骨架（CTF）纳米颗粒。与不规则的块状材料相比，均匀的 CTF 纳米粒子在光催化形成二苯并呋喃方面表现出显着增强的活性。通过将少量苯并噻二唑共聚到共轭分子网络中，可以轻松调节纳米级 CTF 的光电特性。这种电子特性的优化导致观察到的光催化效率进一步提高，与块体材料相比总共提高了 18 倍。多相光催化剂的完全可回收性以及脱卤、羟基化和苯并咪唑形成反应中的催化活性证明了所设计材料的实用性。

更新日期：2020-07-22

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