Hermes Jens Peter, Sanders Fabian, Peterle Torsten, Mayor Marcel
Department of Chemistry, University of Basel, St. Johannsring 19, CH-4056 Basel.
Chimia (Aarau). 2011;65(4):219-22.
Gold nanoparticles (Au NPs) have many potential applications including nanoelectronics, catalysts and sensors. These future devices depend on stable and monodisperse NPs and their directed assembly. Herein we review our efforts to develop oligomeric thioether ligands able to direct the synthesis of Au NPs and their surface functionalization. A screening of different oligomeric thioethers indicates that the NPs become more stable and monodisperse with increasing length of the thioether oligomer. The heptameric benzylic thioether 4 stabilizes monodisperse NPs with a diameter of 1 nm and excellent long-term stability in solution. It is further monofunctionalized with a central protected acetylene. After NP formation in the presence of the ligands we utilize the peripheral functionality to interlink the NPs. A mild oxidative diacetylene coupling protocol is used to covalently bind these 'artificial molecules'. This wet-chemical procedure leads to the formation of hybrid organic-inorganic superstructures.
金纳米颗粒（Au NPs）有许多潜在应用，包括纳米电子学、催化剂和传感器。这些未来的器件依赖于稳定且单分散的纳米颗粒及其定向组装。在此，我们回顾了我们为开发能够指导金纳米颗粒合成及其表面功能化的低聚硫醚配体所做的努力。对不同低聚硫醚的筛选表明，随着硫醚低聚物长度的增加，纳米颗粒变得更加稳定且单分散。七聚苄基硫醚4能稳定直径为1纳米且在溶液中具有出色长期稳定性的单分散纳米颗粒。它进一步用中心受保护的乙炔进行单官能化。在配体存在下形成纳米颗粒后，我们利用外围官能团将纳米颗粒相互连接。采用温和的氧化二乙炔偶联方案将这些“人工分子”共价结合。这种湿化学方法导致形成有机 - 无机杂化超结构。
