Photoelectric Covalent Organic Frameworks: Converting Open Lattices into Ordered Donor鈥揂cceptor Heterojunctions

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• 作者：Long Chen ; Ko Furukawa ; Jia Gao ; Atsushi Nagai ; Toshikazu Nakamura ; Yuping Dong ; Donglin Jiang
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：July 16, 2014
• 年：2014
• 卷：136
• 期：28
• 页码：9806-9809
• 全文大小：320K
• ISSN：1520-5126

文摘

Ordered one-dimensional open channels represent the typical porous structure of two-dimensional covalent organic frameworks (COFs). Here we report a general synthetic strategy for converting these open lattice structures into ordered donor鈥揳cceptor heterojunctions. A three-component topological design scheme was explored to prepare electron-donating intermediate COFs, which upon click reaction were transformed to photoelectric COFs with segregated donor鈥揳cceptor alignments, whereas electron-accepting buckyballs were spatially confined within the nanochannels via covalent anchoring on the channel walls. The donor鈥揳cceptor heterojunctions trigger photoinduced electron transfer and allow charge separation with radical species delocalized in the 蟺-arrays, whereas the charge separation efficiency was dependent on the buckyball content. This new donor鈥揳cceptor strategy explores both skeletons and pores of COFs for charge separation and photoenergy conversion.