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首页> 外文期刊>RSC Advances >Electron transport via phenyl-perfluorophenyl interaction in crystals of fluorine-substituted dibenzalacetones
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Electron transport via phenyl-perfluorophenyl interaction in crystals of fluorine-substituted dibenzalacetones

机译：氟取代的二苯并丙酮晶体中通过苯基-全氟苯基相互作用进行电子传输

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摘要

Although substitution with fluorine creates stability in organic electronic materials by altering the molecular crystal packing, the charge transport properties of the materials are significantly affected. Phenyl-perfluorophenyl (pi-pi(F)) interaction is a unique intermolecular interaction formed between electropositive perfluorophenyl and electronegative non-fluorinated phenyl, and may have a different charge transport as compared to the pi-pi interaction formed between ordinary phenyl rings. Three crystals with both pi-pi(F) interaction and intermolecular hydrogen bonding interaction were chosen to study the relationship between intermolecular interactions and their charge transport properties in both the band-like model and the hopping model. In contrast to ordinary pi-pi interaction, which has been reported to be mainly responsible for hole transport, the pi-pi(F) interaction is mainly responsible for electron transport. Thus, intermolecular pi-pi(F) interaction is an effective packing style to realize the n-type charge carrier. In summary, C-H/center dot center dot center dot F interactions are mainly responsible for electron transport while the C-H/center dot center dot center dot O interaction is responsible for hole transport.
机译：尽管用氟取代通过改变分子晶体堆积在有机电子材料中产生了稳定性，但材料的电荷传输性能受到显着影响。苯基-全氟苯基（pi-pi（F））相互作用是在正电全氟苯基和带负电的非氟化苯基之间形成的独特分子间相互作用，与普通苯环之间形成的pi-pi相互作用相比，其电荷传输可能不同。选择了具有pi-pi（F）相互作用和分子间氢键相互作用的三种晶体，以研究带状模型和跳跃模型中分子间相互作用与其电荷传输性质之间的关系。与普通的pi-pi相互作用（据报道主要负责空穴传输）相反，pi-pi（F）相互作用主要负责电子传输。因此，分子间的pi-pi（F）相互作用是实现n型电荷载流子的有效堆积方式。总之，C-H /中心点中心点中心点F相互作用主要负责电子传输，而C-H /中心点中心点中心点O相互作用主要负责空穴传输。

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