Electroactive macrocycle building blocks are a promising route to new types of functional two-dimensional porous organic frameworks. Our strategy uses conjugated macrocycles that organize into two dimensional porous sheets via non-covalent van der Waals interactions, to make ultrathin films that are just one molecule thick. In bulk, these two-dimensional (2D) sheets stack into a three-dimensional van der Waals crystal, where relatively weak alkyl–alkyl interactions constitute the interface between these sheets. With the liquid-phase exfoliation, we are able to obtain films as thin as two molecular layers. Further using a combination of liquid-phase and mechanical exfoliation, we are able to create non-covalent sheets over a large area (>100 μm²). The ultrathin porous films maintain the single crystal packing from the macrocyclic structure and are electrically conductive. We demonstrate that this new type of 2D non-covalent porous organic framework can be used as the active layer in a field effect transistor device with graphene source and drain contacts along with hexagonal boron nitride as the gate dielectric interface.

中文翻译：

---

具有高结晶度的非共价二维多孔有机材料中的电导率

电活性大环构建基块是通往新型功能性二维多孔有机框架的有前途的途径。我们的策略是使用共轭大环化合物，这些共轭大环化合物通过非共价范德华相互作用而组织成二维多孔片，从而制造出仅一分子厚的超薄薄膜。总体上，这些二维（2D）薄片堆叠成三维范德华晶体，其中较弱的烷基-烷基相互作用构成了这些薄片之间的界面。通过液相剥离，我们能够获得薄至两个分子层的薄膜。进一步使用液相和机械剥离的结合，我们能够创建在大面积上的非共价片（> 100微米²）。超薄多孔膜保持大环结构的单晶堆积并且是导电的。我们证明了这种新型的2D非共价多孔有机骨架可以用作具有石墨烯源极和漏极触点以及六方氮化硼作为栅极电介质界面的场效应晶体管器件中的有源层。