Interaction strength in molecular junctions consisting of π-stacked antiaromatic molecules,Journal of Materials Chemistry C

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Interaction strength in molecular junctions consisting of π-stacked antiaromatic molecules
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-12-19 , DOI: 10.1039/d3tc04166b
Shintaro Fujii ₁ , Ryoya Tomida ₂ , Aoshi Yamane ₁ , Kazuki Nabeyama ₁ , Harunari Ohkura ₁ , Hiroshi Shinokubo ₂ , Tomoaki Nishino ₁

Affiliation

Elucidation of intermolecular interactions is essential for understanding charge transport properties in organic materials and organic electronic devices. While interactions between aromatic molecules have been extensively studied, little is known about interactions between antiaromatic molecules. Theoretical considerations predict that when two antiaromatic porphyrin molecules are superimposed, the antiaromatic molecules should be stabilized by attractive intermolecular interactions. In this study, we used atomic force microscopy to evaluate intermolecular interactions originating from the π–π stacking of the two antiaromatic porphyrin moieties at the molecular level. We evaluated substantial interaction between the antiaromatic porphyrin moieties as an adhesion force of the antiaromatic porphyrin molecular pairs using force spectroscopy. The present result supports the formation of π–π stacking due to the attractive interaction between the two antiaromatic π-systems at the single-molecule level.

中文翻译：

由 π 堆叠抗芳香族分子组成的分子连接中的相互作用强度

阐明分子间相互作用对于理解有机材料和有机电子器件中的电荷传输特性至关重要。虽然芳香族分子之间的相互作用已被广泛研究，但人们对反芳香族分子之间的相互作用知之甚少。理论考虑预测，当两个抗芳香族卟啉分子叠加时，抗芳香族分子应该通过吸引的分子间相互作用来稳定。在这项研究中，我们使用原子力显微镜在分子水平上评估了源自两个反芳香族卟啉部分的 π-π 堆积的分子间相互作用。我们使用力谱评估了抗芳香族卟啉部分之间的实质性相互作用作为抗芳香族卟啉分子对的粘附力。目前的结果支持由于两个反芳香π-系统在单分子水平上的吸引相互作用而形成π-π堆积。

更新日期：2023-12-19

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