Universal Routes to Conjugated Organoboranes and Organoborane Polymers

将三价三坐标硼的空p轨道结合到扩展共轭有机体系中，通常会产生具有强发光和/或半导体行为等有趣特征的材料。这使得有机（光电）电子器件（如有机场效应晶体管（ofet），发光二极管（oled）和光伏电池（opv））的应用成为可能，以及用作某些阴离子，胺或其他生理相关物质的选择性传感材料。在许多应用中，聚合物比分子材料具有许多优点，例如，延长的共轭长度和改进的溶液处理性能。具有感觉能力的发色团在嵌入大分子框架时通常受益于明显的信号放大。然而，共轭有机硼聚合物的发展仍处于起步阶段，这些多功能材料的商业应用前景遥远。其原因似乎是缺乏普遍适用的，有效的合成途径，以这些物种。目前的合成要么效率很低，要么产生剧毒和对环境有害的副产品。该项目旨在开发高效和可持续的合成共轭有机硼烷和有机硼烷聚合物的方法，使其成为普遍适用的方法。亲电引发的途径，如有机催化Si/B交换缩合过程将被探索，这可能是通过高活性硼化中间体进行。这将提供各种新颖的有机硼基材料，具有专门定制的性能和功能。

The incorporation of the vacant p orbital of trivalent, three-coordinate boron into extended conjugated organic systems often leads to materials with intriguing features such as strong luminescence and/or semiconducting behavior. This has enabled applications in organic (opto)electronic devices such as organic field-effect transistors (OFETs), light-emitting diodes (OLEDs), and photovoltaic cells (OPVs), as well as uses as selective sensory materials for certain anions, amines, or other physiologically relevant species. For many applications, polymers bear several advantages over molecular materials, for instance, extended conjugation lengths and improved solution processing properties. Chromophores with sensory ability commonly benefit from pronounced signal amplification when embedded into a macromolecular framework. Nevertheless, the development of conjugated organoboron polymers is still in its infancy and commercial use of these versatile materials is a distant prospect. The reason for this appears to be the lack of generally applicable, efficient synthetic routes to such species. Current syntheses are either poorly efficient and/or produce highly toxic and environmentally harmful by-products. This project aims at the development of highly efficient and sustainable methods for the synthesis of conjugated organoboranes and organoborane polymers to the point where they become generally applicable. Electrophile-initiated routes such as organocatalytic Si/B exchange condensation processes will be explored, which are likely to proceed via highly reactive borocation intermediates. This will provide access to a variety of novel organoborane-based materials with specifically tailored properties and functions.