The simple heating (120 °C) of Pd(OAc)2 in 1-butyronitrile-3-methylimidazolium-N-bis(trifluoromethane sulfonyl)imide ((BCN)MI·NTf2) under reduced pressure leads to the formation of stable and small-sized Pd(0)-NPs (diameter: 7.3 ± 2.2 nm). These metal nanoparticles were characterised by means of TEM, HRTEM and XPS analysis techniques. Moreover, the potential for partial hydrogenation of alkynes in multiphase systems was evaluated. The hydrogenation of internal alkynes at 25 °C and under 1 bar of hydrogen yields Z-alkenes (up to 98% selectivity). Application of higher hydrogen pressure (4 bar) in these reactions always led to the formation of alkanes without the detection of any alkenes. TOF values were attained up to 1282 h−1 with a good recyclability of the system which does not lose its activity for at least 4 runs.
在减压条件下,将Pd(OAc)2在1-
丁腈-3-甲基
咪唑铵-N-双(三
氟甲磺酰)
氟化物((
BCN)MI·NTf2)中简单加热至120°C,导致形成稳定且小尺寸的Pd(0)-纳米颗粒(直径:7.3 ± 2.2 nm)。这些
金属纳米颗粒通过透射电子显微镜(
TEM)、高分辨率透射电子显微镜(HR
TEM)和X射线光电子能谱(XPS)分析技术进行了表征。此外,评估了在多相体系中部分氢化
炔烃的潜力。在25°C和1 bar
氢气压力下,对内部
炔烃进行氢化反应可获得Z-烯烃(最高98%的选择性)。在这些反应中施加更高的
氢气压力(4 bar)始终导致
烷烃的形成,而未检测到任何烯烃。反应的TOF值达到了1282 h−1,且该体系表现出良好的可回收性,在至少进行4次反应后仍保持其活性。