Department of Chemistry, Josip Juraj Strossmayer University of Osijek, Cara Hadrijana 8/A, HR-31000 Osijek, Croatia.
Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovića 6, SRB-21000 Novi Sad, Serbia.
Molecules. 2021 Oct 10;26(20):6115. doi: 10.3390/molecules26206115.
Efficient Lewis-acid-catalyzed direct conversion of aldehydes to 1,2-diketones in the liquid phase was enabled by using newly designed and developed ceria-zirconia-based high-entropy oxides (HEOs) as the actual catalysts. The synergistic effect of various cations incorporated in the same oxide structure (framework) was partially responsible for the efficiency of multicationic materials compared to the corresponding single-cation oxide forms. Furthermore, a clear, linear relationship between the Lewis acidity and the catalytic activity of the HEOs was observed. Due to the developed strategy, exclusively diketone-selective, recyclable, versatile heterogeneous catalytic transformation of aldehydes can be realized under mild reaction conditions.
通过使用新设计和开发的基于氧化铈-氧化锆的高熵氧化物（HEOs）作为实际催化剂，实现了醛在液相中高效的路易斯酸催化直接转化为 1,2-二酮。在相同的氧化物结构（骨架）中掺入多种阳离子的协同效应部分解释了多价阳离子材料相对于相应的单阳离子氧化物形式的效率。此外，还观察到路易斯酸度和 HEOs 催化活性之间存在清晰的线性关系。由于采用了这种策略，仅在温和的反应条件下，就能实现醛的二酮选择性、可回收、多功能的多相催化转化。
