Control of π–π Stacking via Crystal Engineering in Organic Conjugated Small Molecule Crystals
Control of π–π Stacking via Crystal Engineering in Organic Conjugated Small Molecule Crystals
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DOI：
10.1021/acs.cgd.7b01385
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发表时间：
2018-01
影响因子：
3.8
通讯作者：
Ze‐Fan Yao;Jie‐Yu Wang;J. Pei
中科院分区：
文献类型：
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作者：
Ze‐Fan Yao;Jie‐Yu Wang;J. Pei
有机共轭小分子由于其可分辨的晶体结构，本质上是阐明微观结构与电荷传输性质之间关系的理想材料。已有研究表明，电荷输运性质取决于分子结构和分子堆积。在固态下，小分子的π-π堆积在电荷传输过程中起着重要作用。由于共轭小分子的π-π堆积在不同程度上受到其他分子内和分子间相互作用的影响，因此，π-π堆积以及进一步的电荷传输性质可以通过精确的化学修饰通过晶体工程来控制或调节。在此基础上，我们给出了一些典型的例子，说明了控制单晶中π-π堆积的策略。此外，我们试图阐明π-π堆积和其他类型的分子相互作用之间的复杂关系，以及它对电荷输运性质的影响。
Because of their resolvable crystal structure, organic conjugated small molecules are intrinsically ideal for elucidating the relationship between microstructures and charge transport properties. It has been reported that the charge transport properties depend on molecular structure and molecular packing. In the solid state, π–π stacking of small molecules is significant in the charge transport process. Since π–π stacking of conjugated small molecules is influenced at different degrees by other intra- and intermolecular interactions, as a result, π–π stacking and further the charge transport properties can be controlled or tuned by crystal engineering through precise chemical modification. In this perspective, we give some typical examples illustrating the strategy of controlling π–π stacking in single crystals. Furthermore, we attempt to clarify the complex relationship between π–π stacking and other types of molecular interactions, and its influence on charge transport properties.