Conjugated polymers with thiophene-fused thiaborin units and their strong intermolecular interactions
Conjugated polymers with thiophene-fused thiaborin units and their strong intermolecular interactions
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DOI：
10.1038/s41428-022-00726-9
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发表时间：
2022-11
期刊：
影响因子：
2.8
通讯作者：
Yohei Adachi;Mitsuru Sakabe;T. Nomura;J. Ohshita
中科院分区：
文献类型：
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作者：
Yohei Adachi;Mitsuru Sakabe;T. Nomura;J. Ohshita
硼掺杂p−π*共轭聚合物已被研究作为光电和传感器材料。P−π*共轭聚合物通常具有体积庞大的芳基，可以在动力学上稳定硼中心，而体积庞大的芳基取代基在固态下禁止分子间相互作用，从而限制了聚合物在半导体中的应用。在这项工作中，我们合成了一个噻吩-熔融硫aborin单元作为一个新的构建块。硫aborin单体通过锂化反应很容易转化为二苯基和二碘衍生物。具有硫代aborin单元的p−π*共轭聚合物在薄膜状态下的吸收光谱相对于溶液状态下的吸收光谱表现出明显的红移，表明分子间相互作用强。
Boron-incorporated p−π* conjugated polymers have been studied as optoelectronic and sensor materials. p−π* conjugated polymers usually possess bulky aryl groups that kinetically stabilize the boron centers, and the bulky aryl substituents prohibit intermolecular interactions in the solid state, thereby limiting the application of the polymers to semiconductors. In this work, we synthesized a thiophene-fused thiaborin unit as a new building block. The thiaborin monomer was facilely converted into distannyl and diiodo derivatives via lithiation. The p−π* conjugated polymers with the thiaborin unit exhibited well-defined redshifts in the absorption spectra measured in the film state relative to those measured in solution, suggesting strong intermolecular interactions.