A Pyrene-Based, Fluorescent Three-Dimensional Covalent Organic Framework
A Pyrene-Based, Fluorescent Three-Dimensional Covalent Organic Framework
复制标题
基于芘的荧光三维共价有机框架
DOI：
10.1021/jacs.6b00652
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发表时间：
2016-03-16
影响因子：
15
通讯作者：
Wang, Cheng
中科院分区：
文献类型：
--
作者：
Lin, Guiqing;Ding, Huimin;Wang, Cheng
三维COF的定向合成一直被认为是具有挑战性的，特别是采用新的拓扑结构和轴承光电单元。在此，我们首次报道了一种新型的3D芘基COF（3D-Py-COF）的合成和表征，通过选择性地选择前体的几何形状和连接模式。基于X射线衍射测量和详细的模拟，提出了3D-Py-COF采用双层互穿的PTS拓扑结构，这是以前从未报道过的。此外，3D-Py-COF具有窄的孔径分布和高的表面积，并且还具有相对于N-2选择性吸收CO2的特征。有趣的是，由于在3D框架中存在孤立的芘单元，3D-Py-COF是第一个荧光3D COF，并可用于爆炸物检测。我们的研究结果不仅表明可以合理地设计和合成具有其他拓扑结构的3D COFs，而且还表明将光电单元并入3D COFs可以使所得材料具有有趣的特性。
The targeted synthesis of 3D COFs has been considered challenging, especially adopting new topologies and bearing photoelectric units. Herein, for the first time, we report the synthesis and characterization of a novel 3D pyrene-based COF (3D-Py-COF), by selectively choosing the geometry of the precursors and the connection patterns. Based on X-ray diffraction measurement and detailed simulations, 3D-Py-COF is proposed to adopt a two-fold interpenetrated pts topology, which has never been reported before. In addition, 3D-Py-COF has a narrow pore size distribution and high surface area" and also features selective absorption of CO2 over N-2. Interestingly, due to the existence of isolated pyrene units in the 3D framework, 3D-Py-COF is the first fluorescent 3D COF and can be used in explosive detection. Our results not only show it is possible to rationally design and synthesize 3D COFs with other topologies but also demonstrate that the incorporation of photoelectric units into 3D COFs can allow the resulting materials with interesting properties.