Molecular Spoked Wheels: Synthesis and Self-Assembly Studies on Rigid Nanoscale 2D Objects
作者:A. Vikas Aggarwal、Stefan-S. Jester、Sara Mehdizadeh Taheri、Stephan Förster、Sigurd Höger
DOI:10.1002/chem.201203444
日期:2013.4.2
We present the efficient synthesis of a new molecular spoked‐wheel structure (MSW‐3). Two derivatives with diameters of approximately 4 nm have been prepared. By highlighting the importance of pseudo‐high‐dilution conditions during cyclization, we were able to access the compounds on a several hundred milligram scale. In addition to the standard characterization (NMR spectroscopy, MS), we describe
我们提出了一种新的分子辐轮结构(MSW-3)。已经制备了两种直径约4nm的衍生物。通过强调在环化过程中假高稀释条件的重要性,我们能够以几百毫克的规模使用这些化合物。除了标准表征(NMR光谱,MS)之外,我们还通过与适当的模型生色团进行比较来描述荧光MSW的光学性质的详细研究。此外,还通过光和X射线散射实验对溶液中的结构进行了全面研究。扫描隧道显微镜(STM)揭示了分子在高取向热解石墨上的二维组织,并强调了辐条轮结构。通过小角度X射线散射测量的这些分子的直径与STM获得的直径非常吻合,并且与分子建模的结果相符。这证实了辐条的刚性作用,从而产生了形状持久的纳米级扁圆形有机化合物。