氰化
光催化
可见光谱
化学
光化学
多金属氧酸盐
脱氢
分子内力
铈
光催化
催化作用
金属
组合化学
无机化学
材料科学
立体化学
有机化学
光电子学
作者
Kosuke Suzuki,Fei Tang,Yuji Kikukawa,Kazuya Yamaguchi,Noritaka Mizuno
标识
DOI:10.1002/anie.201403215
摘要
Abstract The development of visible‐light‐induced photocatalysts for chemoselective functional group transformations has received considerable attention. Polyoxometalates (POMs) are potential materials for efficient photocatalysts because their properties can be precisely tuned by changing their constituent elements and structures and by the introduction of additional metal cations. Furthermore, they are thermally and oxidatively more stable than the frequently utilized organometallic complexes. The visible‐light‐responsive tetranuclear cerium(III)‐containing silicotungstate TBA 6 [{Ce(H 2 O)} 2 {Ce(CH 3 CN)} 2 (μ 4 ‐O)(γ‐SiW 10 O 36 ) 2 ] (CePOM; TBA=tetra‐ n ‐butylammonium) has now been synthesized; when CePOM was irradiated with visible light ( λ >400 nm), a unique intramolecular Ce III ‐to‐POM(W VI ) charge transfer was observed. With CePOM, the photocatalytic oxidative dehydrogenation of primary and secondary amines as well as the α‐cyanation of tertiary amines smoothly proceeded in the presence of O 2 (1 atm) as the sole oxidant.
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