Supramolecular Design of Donor-Acceptor Complexes via Heteroatom Replacement toward Structure and Electrical Transporting Property Tailoring
Supramolecular Design of Donor-Acceptor Complexes via Heteroatom Replacement toward Structure and Electrical Transporting Property Tailoring
复制标题
通过杂原子置换进行供体-受体复合物的超分子设计，以实现结构和电传输特性定制
DOI：
10.1021/acsami.8b16561
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发表时间：
2019
影响因子：
9.5
通讯作者：
Huang Wei
中科院分区：
文献类型：
--
作者：
Jin Jianqun;Long Guankui;Gao Yongqian;Zhang Jing;Ou Changjin;Zhu Caixia;Xu Haixiao;Zhao Jianfeng;Zhang Mingtao;Huang Wei
可行的策略依赖于使用杂原子替代，即对有机化合物进行化学修饰。在这里，我们提出了给体-受体络合物的设计概念，它包括在给体分子的中环上引入氮原子来促进短接触和减少混合骨架的空间效应。这些氮改性络合物除了具有混合堆积途径、扩大的π-π相互作用之外，还可以具有更短的分子距离，甚至通过额外的受体插入，甚至具有稀有的1：2.5摩尔比。结果表明，不同侧氮原子的1：2络合物表现出稳定的电子场效应迁移率性能，而没有氮取代或相同侧氮原子的二元系表现出较差的双极性。这些结果证实了杂原子取代是微调有机给体-受体络合物的分子堆积及其相应的电子性质的有力的分子设计工具。
A feasible strategy relies on using heteroatom replacement, namely, chemical modification of an organic compound. Here we present this design concept for donor–acceptor complexes, which involves introducing nitrogen atoms to the middle ring of donor molecules to promote short contacts and reduce steric effect of the mixed framework. These nitrogen-modified complexes can possess a shorter molecular distance besides the mixed-stacking pathway, enlarged π–π interactions, or even a scarce 1:2.5 molar ratio through extra acceptor insertion. As a result, the unique 1:2 complex with nitrogen atoms on the different sides demonstrated stable electron field-effect mobility performance, whereas the binary system with no nitrogen replacement or N atoms on the identical sides displayed poor ambipolar properties. These results confirmed that heteroatom replacement was a powerful molecular design tool to fine-tune the molecular packing of organic donor–acceptor complexes and their corresponding electronic properties.