Surface Confined Synthesis of Hydroxy Functionalized Two-Dimensional Polymer: The Effect of the Position of Hydroxy Groups
Surface Confined Synthesis of Hydroxy Functionalized Two-Dimensional Polymer: The Effect of the Position of Hydroxy Groups
复制标题
羟基官能化二维聚合物的表面限域合成：羟基位置的影响
DOI：
10.1002/cphc.201900360
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发表时间：
2019
期刊：
影响因子：
2.9
通讯作者：
Lei Shengbin
中科院分区：
文献类型：
--
作者：
Cao Lili;Yu Yanxia;Zhou Xin;Lei Shengbin
我们报告了一系列二维聚合物（2DP）和含有羟基的大环在高度取向的热解石墨表面上的表面合成。通过扫描隧道显微镜观察形成的2DP和大环。通过改变溶剂和反应温度，直接跟踪从低聚物到有序2DP或离散大环的结构演变。此外，我们还发现，通过交换羟基和醛基的位置，可以将反应产物从扩展的2DP转向离散的大环或链状结构。这些结果表明，羟基和醛基在联苯环上的相对位置在控制和选择表面限制Schiff碱偶联反应的最终产物中起决定性作用。
We report on the on‐surface synthesis of a series of two‐dimensional polymers (2DPs) and macrocycles containing hydroxyl groups on a highly oriented pyrolytic graphite surface. The formed 2DPs and macrocycles were visualized through scanning tunneling microscopy. By varying the solvent and reaction temperature, structural evolution from oligomers to well‐ordered 2DPs or discrete macrocycles was directly followed. In addition, we discovered that the reaction outcome can be steered from extended 2DPs to discrete macrocycles or catenular structures by exchanging the position of the hydroxyl and aldehyde group. These results indicate that the relative positions of hydroxyl and aldehyde groups on the biphenyl ring play a determining role in the control and selection of the final products of the surface‐confined Schiff base coupling reaction.