Institute of Inorganic Chemistry, RWTH Aachen University , Landoltweg 1, 52056 Aachen, Germany.
J Am Chem Soc. 2017 Apr 26;139(16):5692-5695. doi: 10.1021/jacs.7b01835. Epub 2017 Apr 14.
Conjugated organoboranes have emerged as attractive hybrid materials for optoelectronic applications. Herein, a highly efficient, environmentally benign catalytic B-C bond formation method is presented that uses organosilicon compounds, dibromoboranes, and the metal-free organocatalyst MeSiNTf. This Si/B exchange approach has been successfully applied to the synthesis of arylborane molecules 4a-c, oligomers 8a,b, and polymers 8a',b'. Photophysical investigations, supported by TD-DFT calculations, reveal highly effective π-conjugation in thienyl- and furylborane species; the latter are also highly emissive.
有机硼化合物已成为光电应用中极具吸引力的混合材料。在此，本文提出了一种高效、环保的催化 B-C 键形成方法，该方法使用有机硅化合物、二溴硼烷和无金属有机催化剂 MeSiNTf。这种 Si/B 交换方法已成功应用于芳基硼烷分子 4a-c、齐聚物 8a,b 和聚合物 8a',b'的合成。基于 TD-DFT 计算的光物理研究表明，噻吩基和呋喃基硼化物具有高效的π 共轭；后者也具有很强的发光性。
