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Enhanced C(sp3)–H Selective Oxidation Using Efficient Polyoxometalate-Based Metal–Organic Framework Photocatalysts Synergized with Ir Metalloligands and Polyoxometalates
Chemistry of Materials ( IF 7.2 ) Pub Date : 2024-11-09 , DOI: 10.1021/acs.chemmater.4c02040
Jing Wang, Luoning Li, Yanan Liu, Zelong Yuan, Pengtao Ma, Jingping Wang, Jingyang Niu

Achieving efficient selective visible light-induced oxidation of benzyl C(sp3)–H to more valuable double-bonded compounds holds significant promise for organic synthesis. In this work, we fabricated an example of Ir metalloligand-modified POMOF crystalline material, CI-SiW, which is noteworthy as the first example of POM immobilized in a metalloligand-modified MOF via coordination bonding. Under the excitation of visible light (10 W, λ = 410 nm), CI-SiW can catalyze the efficient oxidation of benzyl C(sp3)–H of isochromane with a turnover number and turnover frequency of 954 and 1740 h–1, respectively. Excitingly, CI-SiW displays the best TOF compared with previous photocatalysts under the same conditions, realizing the maximum yield with the minimum amount of photocatalyst. Furthermore, CI-SiW had good cyclic and structural stability, and a 90.4% yield was still obtained after three reaction cycles.

中文翻译:


使用高效的多金属氧酸盐基金属-有机框架光催化剂与 Ir 金属配体和多金属氧酸盐协同作用的增强型 C(sp3)-H 选择性氧化



实现苄基 C(sp3)-H 高效、选择性可见光诱导氧化为更有价值的双键化合物,为有机合成具有重要前景。在这项工作中,我们制造了一个 Ir 金属配体改性的 POMOF 晶体材料的例子 CI-SiW,这是第一个通过配位键将 POM 固定在金属配体改性的 MOF 中的例子。在可见光 (10 W, λ = 410 nm) 激发下,CI-SiW 可以催化异色棉的苄基 C(sp3)–H 高效氧化,其周转数和周转频率分别为 954 和 1740 h–1。令人兴奋的是,在相同条件下,与以前的光催化剂相比,CI-SiW 显示出最佳的 TOF,以最少的光催化剂量实现了最大的产量。此外,CI-SiW 具有良好的循环和结构稳定性,3 次反应循环后仍获得 90.4% 的产率。
更新日期:2024-11-09
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