期刊
ADVANCED MATERIALS
卷 33, 期 21, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202008685
关键词
C; C bond formation; conjugated porous networks; Grignard reagents; mechanochemistry; Ullmann‐ type reactions
类别
资金
- Division of Chemical Sciences, Geosciences and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy
- US Department of Energy (DOE) [DE-AC05-00OR22725]
A novel method using mechanochemical Ullmann-type reactions to promote direct aromatic ring knitting has been demonstrated to afford CPNs with high surface areas and mesoporous architecture under neat and ambient conditions. The versatility of this approach has been confirmed by successful construction of various CPNs and even highly crystalline graphite product, showing good electrochemical performance in lithium-ion batteries. This strategy expands the frontiers of CPN synthesis and provides new opportunities for their scalable applications.
The current approaches capable of affording conjugated porous networks (CPNs) still rely on solution-based coupling reactions promoted by noble metal complexes or Lewis acids, on-surface polymerization conducted in ultrahigh-vacuum environment at very high temperatures (>200 degrees C), or mechanochemical Scholl-type reactions limited to electron-rich substrates. To develop simple and scalable approaches capable of making CPNs under neat and ambient conditions, herein, a novel and complementary method to the current oxidative Scholl coupling processes is demonstrated to afford CPNs via direct aromatic ring knitting promoted by mechanochemical Ullmann-type reactions. The key to this strategy lies in the dehalogenation of aromatic halides in the presence of Mg involving the formation of Grignard reagent intermediates. Products (Ph-CPN-1) obtained via direct C-C bond formation between 1,2,4,5-tetrabromobenzene (TBB) monomer feature high surface areas together with mesoporous architecture. The versatility of this approach is confirmed by the successful construction of various CPNs via knitting of the corresponding aromatic rings (e.g., pyrene and triphenylene), and even highly crystalline graphite product was obtained. The CPNs exhibit good electrochemical performance as the anode material in lithium-ion batteries (LIBs). This approach expands the frontiers of CPN synthesis and provides new opportunities to their scalable applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据