This communication reports the synthesis of new intrinsically electroactive N-alkyl imidazolium ionic liquids useful for the investigation of charge transport phenomena in undiluted semisolid redox media. The redox site chosen is ferrocene, but the overall approach should be general for designing imidazolium-based molten salts. The ferrocene is attached to imidazolium with several structural variations, and preliminary voltammetry of a melt is presented.
我们提出了一种原位还原策略,以制备由高度分散的贵金属支撑的介孔二氧化硅。首先,设计并合成了具有二茂铁基作为还原性疏水端基的两亲性分子。接下来,我们将其用作结构导向剂以自组装成中孔二氧化硅。然后残留在中孔通道中的两亲物可以原位将金或钯盐还原成相应的金属纳米粒子。最后,通过煅烧除去两亲物。通过XRD和TEM证实了介孔结构和高度分散的Au或Pd纳米颗粒。XPS证明了两亲物的还原性,并通过循环伏安法和热力学计算进一步证实。BET分析表明,介孔催化剂的比表面积超过900 m 2 g -1。与通过传统浸渍方法制备的催化剂相比,该催化剂在4-硝基苯酚的还原和Suzuki反应中显示出显着更高的催化活性。