Park Wongi, Feringán Beatriz, Yang Minyong, Ryu Seong Ho, Ahn Hyungju, Shin Tae Joo, Sierra Teresa, Giménez Raquel, Yoon Dong Ki
Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
Departamento de Química Orgánica Instituto de Ciencia de Materiales de Aragón (ICMA) Facultad de Ciencias, Universidad de Zaragoza-CSIC, Zaragoza, 50009, Spain.
Chemphyschem. 2019 Mar 18;20(6):890-897. doi: 10.1002/cphc.201801042. Epub 2019 Feb 27.
Ambipolar organic semiconductors are considered promising for organic electronics because of their interesting electric properties. Many hurdles remain yet to be overcome before they can be used for practical applications, especially because their orientation is hard to control. We demonstrate a method to control the orientation of columnar structures based on a hydrogen (H)-bonded donor-acceptor complex between a star-shaped tris(triazolyl)triazine and triphenylene-containing benzoic acid, using physicochemical nanoconfinement. The molecular configuration and supramolecular columnar assemblies in a one-dimensional porous anodic aluminium oxide (AAO) film were dramatically modulated by controlling the pore-size and by chemical modification of the inner surface of the porous AAO film. In situ experiments using grazing-incidence X-ray diffraction (GIXRD) were carried out to investigate the structural evolution produced at the nanometer scale by varying physicochemical conditions. The resulting highly ordered nanostructures may open a new pathway to effectively control the alignment of liquid crystal ambipolar semiconductors.
双极性有机半导体因其有趣的电学性质而被认为在有机电子学领域具有广阔前景。在它们能够用于实际应用之前，仍有许多障碍有待克服，尤其是因为其取向难以控制。我们展示了一种基于星形三（三唑基）三嗪与含三亚苯的苯甲酸之间的氢键供体 - 受体复合物，利用物理化学纳米限域来控制柱状结构取向的方法。通过控制孔径以及对多孔阳极氧化铝（AAO）膜的内表面进行化学修饰，一维多孔阳极氧化铝（AAO）膜中的分子构型和超分子柱状组装体得到了显著调节。利用掠入射X射线衍射（GIXRD）进行原位实验，以研究通过改变物理化学条件在纳米尺度上产生的结构演变。由此产生的高度有序的纳米结构可能为有效控制液晶双极性半导体的排列开辟一条新途径。
