Heterogeneous visible light photocatalysis for selective organic transformations

Heterogeneous visible light photocatalysis for selective organic transformations

2014 | Lang, Xianjun; Chen, Xiaodong; Zhao, Jincai
The article "Heterogeneous Visible Light Photocatalysis for Selective Organic Transformations" by Xianjun Lang, Xiaodong Chen, and Jincai Zhao reviews the advancements in visible-light-induced selective organic transformations using heterogeneous photocatalysis. The review is divided into three sections based on the type of photocatalyst: metal oxides (TiO₂, Nb₂O₅, ZnO), plasmonic photocatalysts (nanostructured Au, Ag, Cu supported on metal oxides), and polymeric graphitic carbon nitride (g-C₃N₄). Each section discusses specific reactions and their conditions, highlighting the advantages and limitations of each photocatalyst type. Metal oxides, such as TiO₂, Nb₂O₅, and ZnO, are efficient photocatalysts under UV irradiation but have low selectivity. However, visible light irradiation can improve selectivity by forming surface complexes with heteroatom-containing substrates, enabling reactions like the oxidation of alcohols and amines. Plasmonic photocatalysts, such as Au, Ag, and Cu nanoparticles, can be supported on metal oxides to enhance stability and performance. These catalysts can facilitate various reactions, including the oxidation of alcohols, amines, and the epoxidation of alkenes, under visible light irradiation. Polymeric graphitic carbon nitride (g-C₃N₄) is a metal-free photocatalyst with a medium band gap and high structural stability. It can function as a visible light photocatalyst for selective redox reactions, such as the oxidation of alcohols and amines, and the functionalization of sp³ C–H bonds adjacent to N-atoms. The review also discusses the potential of combining photocatalysis with other catalytic processes, such as organocatalysis, to overcome limitations and achieve more creative synthetic methodologies. Overall, the review highlights the potential of heterogeneous visible light photocatalysis for environmentally friendly and energy-efficient organic transformations, emphasizing the importance of selecting appropriate photocatalysts and reaction conditions to achieve high selectivity and efficiency.The article "Heterogeneous Visible Light Photocatalysis for Selective Organic Transformations" by Xianjun Lang, Xiaodong Chen, and Jincai Zhao reviews the advancements in visible-light-induced selective organic transformations using heterogeneous photocatalysis. The review is divided into three sections based on the type of photocatalyst: metal oxides (TiO₂, Nb₂O₅, ZnO), plasmonic photocatalysts (nanostructured Au, Ag, Cu supported on metal oxides), and polymeric graphitic carbon nitride (g-C₃N₄). Each section discusses specific reactions and their conditions, highlighting the advantages and limitations of each photocatalyst type. Metal oxides, such as TiO₂, Nb₂O₅, and ZnO, are efficient photocatalysts under UV irradiation but have low selectivity. However, visible light irradiation can improve selectivity by forming surface complexes with heteroatom-containing substrates, enabling reactions like the oxidation of alcohols and amines. Plasmonic photocatalysts, such as Au, Ag, and Cu nanoparticles, can be supported on metal oxides to enhance stability and performance. These catalysts can facilitate various reactions, including the oxidation of alcohols, amines, and the epoxidation of alkenes, under visible light irradiation. Polymeric graphitic carbon nitride (g-C₃N₄) is a metal-free photocatalyst with a medium band gap and high structural stability. It can function as a visible light photocatalyst for selective redox reactions, such as the oxidation of alcohols and amines, and the functionalization of sp³ C–H bonds adjacent to N-atoms. The review also discusses the potential of combining photocatalysis with other catalytic processes, such as organocatalysis, to overcome limitations and achieve more creative synthetic methodologies. Overall, the review highlights the potential of heterogeneous visible light photocatalysis for environmentally friendly and energy-efficient organic transformations, emphasizing the importance of selecting appropriate photocatalysts and reaction conditions to achieve high selectivity and efficiency.
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Understanding Heterogeneous visible light photocatalysis for selective organic transformations.