N-heterocyclic carbene Pd(II) complex supported on Fe3O4@SiO2: Highly active, reusable and magnetically separable catalyst for Suzuki-Miyaura cross-coupling reactions in aqueous media
作者:Mitat Akkoç、Nesrin Buğday、Serdar Altın、Nadir Kiraz、Sedat Yaşar、İsmail Özdemir
DOI:10.1016/j.jorganchem.2021.121823
日期:2021.6
presence of 2 mg of Fe3O4@SiO2@NHC@Pd-MNPs catalyst (0.0197 mmolg−1, 0.00394 mmol%Pd) at 80 °C in 2-propanol/H2O (1:2). In addition, the magnetic nano Fe3O4@SiO2@NHC@Pd-MNPs catalyst was easily recovered by using an external Nd-magnet and reused for the Suzuki cross-coupling reactions. The catalyst showed strong structural and chemical stability and was reused six times without losing its catalytic activity
制备了新型的磁性纳米Fe 3 O 4 @SiO 2 @ NHC @ Pd-MNPs非均相催化剂,并通过傅里叶变换红外光谱,透射电镜,X射线衍射,X-射线衍射表征。射线光电子能谱(XPS),能量分散X射线分析(EDX),热重分析(TGA),差热分析(DTA)和扫描电子显微镜(SEM)。通过电感耦合等离子体发射光谱法(ICP-OES)分析了钯(Pd)对磁性纳米Fe 3 O 4 @SiO 2 @ NHC @ Pd-MNPs的负载量。磁性纳米Fe 3 O 4 @SiO的催化活性在芳基卤化物与不同取代的芳基硼酸衍生物的Suzuki-Miyaura交叉偶联反应中,研究了2 @ NHC @ Pd-MNPs非均相催化剂。所有偶联反应,得到优异的结果和高TOF(高达76528ħ -1中的2毫克铁的存在下)3 ö 4 @SiO 2 @ NHC @钯催化剂的MNP(0.0197 mmolg -1,0.00394毫摩尔%的Pd)在在2-丙醇/