揭示 Pd(II)-共价有机聚酰亚胺骨架在铃木偶联反应中的潜力：合成、表征和催化效率的研究,Applied Organometallic Chemistry

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揭示 Pd(II)-共价有机聚酰亚胺骨架在铃木偶联反应中的潜力：合成、表征和催化效率的研究
Applied Organometallic Chemistry ( IF 3.7 ) Pub Date : 2023-12-19 , DOI: 10.1002/aoc.7333
Farid Moeinpour ₁

Affiliation

在这项研究中，通过将 Pd(II) 固定在由共价有机聚酰亚胺框架 (PI-COF) 组成的基质上，构想出一种高效的多相 Pd 催化系统。使用透射电子显微镜（TEM）、扫描电子显微镜（SEM）、N ₂吸附分析（Brunauer-Emmett-Teller [BET]）、傅里叶变换红外（FT-IR）、热重分析等技术对合成的催化剂进行了全面表征(TGA) 和电感耦合等离子体原子发射光谱 (ICP-AES)。随后，在铃木反应的背景下探索了这种固定化钯催化剂的催化活性。在正常大气压下，在水中于 70°C 反应长达 1 小时，以良好至优异的收率 (>90%) 生成联芳基化合物。更重要的是，反应过程中 Pd(II) 的浸出可以忽略不计（约 0.5 ppm），这在制备生物活性物质时至关重要。 PI-COF 上 Pd(II) 离子的负载量为 0.49 mmol/g。该催化剂表现出优异的性能，在环境友好的反应条件下与苯基硼酸反应时，对催化多种芳基卤（不包括芳基氯）具有显着的功效。值得注意的是，该催化剂表现出强大的可回收性，在 5 个反应周期中保持其催化活性，没有任何显着下降。

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Unveiling the potential of Pd(II)-covalent organic polyimide framework in Suzuki coupling reactions: A study on synthesis, characterization, and catalytic efficiency

In this research, a highly effective heterogeneous Pd catalytic system was conceived by immobilizing Pd(II) onto a substrate composed of covalent organic polyimide frameworks (PI-COF). The synthesized catalyst underwent comprehensive characterization using techniques such as transmission electron microscopy (TEM), scanning electron microscopy (SEM), N₂ adsorption analysis (Brunauer–Emmett–Teller [BET]), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA), and inductively coupled plasma atomic emission spectroscopy (ICP-AES). Subsequently, the catalytic activity of this immobilized Pd catalyst was explored in the context of the Suzuki reaction. The reactions at 70°C up to 1 h under a normal atmosphere in water result in biaryls at good to excellent yields (>90%). More importantly, the leaching of Pd(II) during the reaction process could be negligible (about 0.5 ppm), which is crucially important when preparing bioactive species. The loading of Pd(II) ions on the PI-COF was 0.49 mmol/g. The catalyst exhibited exceptional performance, demonstrating remarkable efficacy in catalyzing a wide range of aryl halides (excluding aryl chlorides) when reacted with phenylboronic acid under environmentally friendly reaction conditions. Notably, the catalyst exhibited robust recyclability, retaining its catalytic activity throughout 5 reaction cycles without any significant decrease.

更新日期：2023-12-19

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