On-surface synthesis of single-layered two-dimensional covalent organic frameworks via solid-vapor interface reactions

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[1] [1,Liu, Xuan-He
[2] 1,Guan, Cui-Zhong
[3] Ding, San-Yuan
[4] Wang, Wei
[5] Yan, Hui-Juan
[6] Wang, Dong
[7] Wan, Li-Jun
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Wang, D. (wangd@iccas.ac.cn) | 1600年 / American Chemical Society卷 / 135期
关键词：
Surface covalent organic frameworks (SCOFs); featured by atomic thick sheet with covalently bonded organic building units; are promised to possess unique properties associated with reduced dimensionality; well-defined in-plane structure; and tunable functionality. Although a great deal of effort has been made to obtain SCOFs with different linkages and building blocks via both top-down exfoliation and bottom-up surface synthesis approaches; the obtained SCOFs generally suffer a low crystallinity; which impedes the understanding of intrinsic properties of the materials. Herein; we demonstrate a self-limiting solid-vapor interface reaction strategy to fabricate highly ordered SCOFs. The coupling reaction is tailored to take place at the solid-vapor interface by introducing one precursor via vaporization to the surface preloaded with the other precursor. Following this strategy; highly ordered honeycomb SCOFs with imine linkage are obtained. The controlled formation of SCOFs in our study shows the possibility of a rational design and synthesis of SCOFs with desired functionality. © 2013 American Chemical Society;
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