High-Rate Charge-Carrier Transport in Porphyrin Covalent Organic Frameworks: Switching from Hole to Electron to Ambipolar Conduction
High-Rate Charge-Carrier Transport in Porphyrin Covalent Organic Frameworks: Switching from Hole to Electron to Ambipolar Conduction
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DOI：
10.1002/anie.201106203
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发表时间：
2012-01-01
影响因子：
16.6
通讯作者：
Jiang, Donglin
中科院分区：
文献类型：
--
作者：
Feng, Xiao;Liu, Lili;Jiang, Donglin
导电聚合物由于其载流子传输能力而在光电子、晶体管和太阳能电池中发挥着关键作用。为了实现高速载流子传输，高度优选允许形成有组织的传导路径的共轭结构的分子设计。 [1]在此背景下，二维共价有机框架 (2D COF) 提供了一类具有非常规结构的新型导电聚合物，其具有 2D 多边形片和重叠堆叠架构，为电荷载流子传输提供预组织路径。 [2, 3] COF 的一个显着特征是 2D 多边形片中构建块的排序是离散的，并且 2D 片材是平行且单向的。传统的 1D 和 3D 导电聚合物很少能提供如此组织良好的结构，具有精确的面内和面间排序。我们通过将 p 电子组件集成到 2D COF 的骨架中，专注于 p 电子 2D COF 的合成。 [3]最近，我们开发了一种典型的大p体系，即用于合成四方二维卟啉COF的卟啉单元，该体系表现出高结晶度和大表面积。 [4]在研究过程中，我们发现卟啉单元堆积在一个
Conducting polymers play a key role in optoelectronics, transistors, and solar cells owing to their capability in chargecarrier transport. To achieve high-rate carrier transport, the molecular design of a conjugated structure that allows the formation of organized conducting pathways is highly preferred.[1] In this context, two-dimensional covalent organic frameworks (2D COFs) offer a new class of conducting polymers with unconventional structures that feature 2D polygon sheets and eclipsed stacking architecture to provide preorganized pathways for charge-carrier transport.[2, 3] A significant feature of COFs is that the ordering of building blocks in the 2D polygon sheet is discrete and the layered alignment of 2D sheets is parallel and unidirectional. Such a well-organized architecture with precise intra-and interplane orderings is seldom available with conventional 1D and 3D conducting polymers.We have focused on the synthesis of p-electronic 2D COFs by integrating p-electronic components into the skeletons of 2D COFs.[3] Recently, we have developed a typical and large p system, that is, a porphyrin unit for the synthesis of a tetragonal 2D porphyrin COF, which shows high crystallinity and large surface area.[4] During the course of the study, we found that the porphyrin units stacked in an