Efficient Photocatalytic Oxidation of Aromatic Alcohols over Thiophene‐based Covalent Triazine Frameworks with A Narrow Band Gap,ChemistrySelect

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Efficient Photocatalytic Oxidation of Aromatic Alcohols over Thiophene‐based Covalent Triazine Frameworks with A Narrow Band Gap
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-12-02 , DOI: 10.1002/slct.202004115
Longfei Liao ₁ , Daniel Ditz ₁ , Feng Zeng ₁ , Marcelo Alves Favaro ₁ , Andree Iemhoff ₁ , Kavita Gupta ₁ , Heinrich Hartmann ₂ , Conrad Szczuka _{3,

4} , Peter Jakes ₃ , Peter J. C. Hausoul ₁ , Jens Artz ₁ , Regina Palkovits ₁

Affiliation

Photocatalytic selective oxidation of aromatic alcohols by covalent organic frameworks (COFs) is a sustainable strategy to replace present metal‐based heterogeneous catalytic oxidation systems. Covalent triazine‐based frameworks (CTFs), a subgroup of COFs, possess promising properties as efficient catalysts for photocatalytic oxidation. Sulfur‐containing metal‐free CTFs exhibit a good performance in photocatalysis due to their narrowed band gap, and the fast generated photoelectrons/holes separation and transfer. Here, we report the synthesis of thiophene‐based CTFs under mild conditions for photocatalytic oxidation of aromatic alcohols to the corresponding benzaldehydes using pure oxygen as the oxidant. Full conversion and a selectivity as high as 90 % to benzaldehyde were obtained paving the way for a potential application of these metal‐free photocatalysts in fine chemicals synthesis.

中文翻译：

在具有窄带隙的基于噻吩的共价三嗪骨架上有效地光催化氧化芳香醇

通过共价有机框架（COF）对芳族醇进行光催化选择性氧化是取代现有的基于金属的非均相催化氧化系统的可持续策略。共价三嗪基骨架（CTF）是COF的一个子类，具有作为光催化氧化的有效催化剂的有前途的性能。含硫的无金属CTF由于其带隙较窄以及快速产生的光电子/空穴分离和转移而在光催化方面表现出良好的性能。在这里，我们报道了在纯条件下使用纯氧作为氧化剂，将芳族醇光催化氧化为相应的苯甲醛的噻吩基CTF的合成。

更新日期：2020-12-02

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