Key Laboratory of Biomedical Polymers (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072 (P.R. China).
Chemistry. 2014 Nov 3;20(45):14614-8. doi: 10.1002/chem.201405330. Epub 2014 Sep 29.
Two-dimensional covalent organic frameworks (2D COFs) provide a unique platform for the molecular design of electronic and optoelectronic materials. Here, the synthesis and characterization of an electroactive COF containing the well-known tetrathiafulvalene (TTF) unit is reported. The TTF-COF crystallizes into 2D sheets with an eclipsed AA stacking motif, and shows high thermal stability and permanent porosity. The presence of TTF units endows the TTF-COF with electron-donating ability, which is characterized by cyclic voltammetry. In addition, the open frameworks of TTF-COF are amenable to doping with electron acceptors (e.g., iodine), and the conductivity of TTF-COF bulk samples can be improved by doping. Our results open up a reliable route for the preparation of well-ordered conjugated TTF polymers, which hold great potential for applications in fields from molecular electronics to energy storage.
二维共价有机骨架（2D COFs）为电子和光电材料的分子设计提供了独特的平台。在这里，报道了一种含有众所周知的四硫富瓦烯（TTF）单元的电活性 COF 的合成和表征。TTF-COF 结晶为具有重叠 AA 堆积方式的 2D 片层，具有高热稳定性和永久孔隙率。TTF 单元的存在赋予了 TTF-COF 供电子能力，这可以通过循环伏安法来表征。此外，TTF-COF 的开放框架可与电子受体（例如碘）进行掺杂，并且掺杂可以提高 TTF-COF 块状样品的电导率。我们的结果为制备有序共轭 TTF 聚合物开辟了可靠的途径，这些聚合物在从分子电子学到储能等领域具有巨大的应用潜力。
