The field of supramolecular polymers is rapidly expanding; however, the exploitation of these systems as functional materials is still elusive. To become competitive, supramolecular polymers must display microstructural order and the emergence of new properties upon copolymerization. To tackle this, a greater understanding of the relationship between monomers’ design and polymer microstructure is required as well as a set of functional monomers that efficiently interact with one another to synergistically generate new properties upon copolymerization. Here, we present the first implementation of frustrated Lewis pairs into supramolecular copolymers. Two supramolecular copolymers based on π-conjugated O-bridged triphenylborane and two different triphenylamines display the formation of B–N pairs within the supramolecular chain. The remarkably long lifetime and the circularly polarized nature of the resulting photoluminescence emission highlight the possibility to obtain an intermolecular B–N charge transfer. These results are proposed to be the consequences of the enchainment of B–N frustrated Lewis pairs within 1D supramolecular aggregates. Although it is challenging to obtain a precise molecular picture of the copolymer microstructure, the formation of random blocklike copolymers could be deduced from a combination of optical spectroscopic techniques and theoretical simulation.

中文翻译：

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BN 受阻路易斯对超分子共聚物中的长寿命电荷转移状态

超分子聚合物领域正在迅速扩大；然而，这些系统作为功能材料的开发仍然难以捉摸。为了具有竞争力，超分子聚合物必须显示出微观结构的有序性和共聚后新性能的出现。为了解决这个问题，需要更深入地了解单体设计和聚合物微观结构之间的关系，以及一组功能性单体，它们可以有效地相互作用以在共聚时协同产生新的性能。在这里，我们首次将受挫的路易斯对转化为超分子共聚物。两种基于π-共轭O-桥联三苯基硼烷和两种不同三苯基胺的超分子共聚物在超分子链内形成了B-N对。由此产生的光致发光发射的显着长寿命和圆极化性质突出了获得分子间 B-N 电荷转移的可能性。这些结果被认为是一维超分子聚集体中 B-N 受阻刘易斯对链化的结果。尽管获得共聚物微观结构的精确分子图片具有挑战性，但可以从光谱技术和理论模拟的组合中推断出无规嵌段共聚物的形成。