Wasserfallen Daniel, Kastler Marcel, Pisula Wojciech, Hofer Werner A, Fogel Yulia, Wang Zhaohui, Müllen Klaus
Max-Planck-Institute for Polymer Research, Mainz, Germany.
J Am Chem Soc. 2006 Feb 1;128(4):1334-9. doi: 10.1021/ja056782j.
With the approach presented herein, a large aromatic pi-system is synthesized, which shows extraordinarily high solubility and an effective suppression of aggregation. This was due to a distortion of the aromatic core by bulky tert-butyl groups and the solubilizing effects of alkyl chains in the corona of the aromatic core. Therefore not only the processing and cleaning of the materials with standard laboratory techniques became possible, but moreover the first structure-rich UV/vis and a resolved (1)H NMR spectra for an aromatic system two times larger than hexa-peri-hexabenzocoronene were recorded. The bulk properties in an extruded fiber as well as on the surface showed a columnar self-assembly including a phase in which a homeotropic alignment on a substrate was observed, which turns the material into an interesting candidate for future applications in electronic devices.
采用本文提出的方法，合成了一个大的芳香π体系，该体系表现出极高的溶解度并能有效抑制聚集。这是由于庞大的叔丁基使芳香核发生扭曲，以及芳香核冠层中烷基链的增溶作用。因此，不仅使用标准实验室技术对材料进行加工和清洗成为可能，而且还记录了首个结构丰富的紫外/可见光谱以及比六并苯大二倍的芳香体系的解析¹H NMR光谱。挤出纤维中的本体性质以及表面性质显示出柱状自组装，包括在基底上观察到垂直排列的相，这使该材料成为未来电子器件应用中一个有趣的候选材料。
