Synthesis of porphyrin nanodisks from COFs through mechanical stirring and their photocatalytic activity
Synthesis of porphyrin nanodisks from COFs through mechanical stirring and their photocatalytic activity
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DOI：
10.1016/j.apsusc.2020.145720
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发表时间：
2020-05-30
影响因子：
6.7
通讯作者：
Osakada, Yasuko
中科院分区：
文献类型：
--
作者：
Li, Xinxi;Goto, Tomoyo;Osakada, Yasuko
薄层二维（2D）有机纳米材料的合成由于其在光电化学和光催化方面的潜在应用近年来引起了人们的广泛关注。为了合成薄层有机聚合物，如聚合物纳米片和纳米盘，以苯或三苯基苯为核心单元的共价有机框架（COFs）在普通溶剂中浸泡或机械超声。然而，要去除含有这种卟啉单位的π共轭COFs仍然具有挑战性。在本研究中，我们研究了含卟啉的COFs在常用溶剂下的液相剥离，发现调节溶剂表面能和机械搅拌是有效剥离的关键。采用机械搅拌的方法在普通溶剂中合成了薄层共价有机卟啉纳米片，并观察了其光催化活性的增强。
The synthesis of thin-layered two dimensional (2D) organic nanomaterials has recently attracted considerable attention because of their potential for use in photo-electrochemistry and photocatalysis. To synthesize thin-layered organic polymers such as polymer nanosheets and nanodisks, covalent organic frameworks (COFs) with benzene or triphenylbenzene core units, are immersed or mechanically sonicated in common solvent. However, it is still challenging to exfoliate the pi-conjugated COFs containing such porphyrin units. In this study, we investigated the liquid-phase exfoliation of COFs comprising porphyrin using common solvents, and found that tuning the solvent surface energy as well as mechanical stirring is crucial for effective exfoliation. We synthesized thin-layered, covalent organic porphyrin nanodisks in a common solvent by mechanical stirring and observed their enhanced photocatalytic activity.