Mokhtar Mohamed, Alzhrani Ghalia, Aazam Elham S, Saleh Tamer S, Al-Faifi Sulaiman, Panja Subir, Maiti Debabrata
Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
Chemistry Department, Faculty of Science, University of Jeddah, P.O. Box 80329, Jeddah, 21589, Saudi Arabia.
Chemistry. 2021 Jun 16;27(34):8875-8885. doi: 10.1002/chem.202100018. Epub 2021 May 17.
Herein, we report the synthesis of nickel-layered double hydroxide amalgamated Y-zeolite (NiLDH@YZ) hybrids and the evaluation of the synergistic effect of various NiLDH@YZ catalysts and mechanochemical agitation on Glaser homocoupling reactions. Nitrogen adsorption-desorption experiments were carried out to estimate the surface area and porosity of NiLDH@YZ hybrids. The basicity and acidity of these hybrids were determined by CO -TPD and NH -TPD experiments respectively and this portrayed good acid-base bifunctional feature of the catalysts. The NiLDH@YZ-catalyzed mechanochemical Glaser coupling reaction achieved best yield of 83 % for the 0.5NiLDH@0.5YZ hybrid after 60 min of agitation, which revealed the highest acid-base bifunctional feature compared to all the investigated catalysts. The developed catalyst has proven itself as a robust and effective candidate that can successfully be employed up to four catalytic cycles without significant loss in catalytic activity, under optimized reaction conditions. This work demonstrated a new strategy for C-C bond formation enabled by the synergy between mechanochemistry and heterogeneous catalysis.
在此，我们报告了镍层状双氢氧化物与Y型沸石（NiLDH@YZ）杂化物的合成，以及各种NiLDH@YZ催化剂和机械化学搅拌对格拉泽均偶联反应的协同效应评估。进行了氮吸附-脱附实验以估算NiLDH@YZ杂化物的表面积和孔隙率。分别通过CO -TPD和NH -TPD实验测定了这些杂化物的碱度和酸度，这表明催化剂具有良好的酸碱双功能特性。在搅拌60分钟后，对于0.5NiLDH@0.5YZ杂化物，NiLDH@YZ催化的机械化学格拉泽偶联反应实现了83%的最佳产率，这表明与所有研究的催化剂相比，其具有最高的酸碱双功能特性。在优化的反应条件下，所开发的催化剂已证明自身是一种强大而有效的候选催化剂，可成功用于多达四个催化循环，而催化活性无显著损失。这项工作展示了一种通过机械化学与多相催化之间的协同作用实现C-C键形成的新策略。
