Dong Wei-long, Wang Lin, Ding Hui-min, Zhao Lu, Wang Dong, Wang Cheng, Wan Li-Jun
Institute of Chemistry, Chinese Academy of Sciences (CAS) , Beijing 100190, PR China.
University of CAS , Beijing, PR China.
Langmuir. 2015 Nov 3;31(43):11755-9. doi: 10.1021/acs.langmuir.5b02412. Epub 2015 Oct 20.
The on-surface reactions of tetrathiafulvalene equipped with four benzaldehyde groups (4ATTF) and ditopic diamine molecules are investigated. 4ATTF tends to form large-scale-ordered rhombus structures when reacted with p-phenylenediamine (PPDA). A longer ditopic diamine molecule, 1,1'-biphenyl-4,4'-diamine dihydrochloride (BPDA), causes the domain size of the regular rhombus structure to decrease and triangular and irregular rhombus structures to appear upon reaction with 4ATTF. However, in the rhombus structures formed by different-length ditopic diamine molecules, the single-layer covalent organic frameworks on the graphite surface preferentially orient in alignment with the underlying HOPG substrate lattice.
研究了带有四个苯甲醛基团的四硫富瓦烯（4ATTF）与双官能二胺分子的表面反应。4ATTF与对苯二胺（PPDA）反应时倾向于形成大规模有序的菱形结构。一种更长的双官能二胺分子，1,1'-联苯-4,4'-二胺二盐酸盐（BPDA），与4ATTF反应时会导致规则菱形结构的畴尺寸减小，并出现三角形和不规则菱形结构。然而，在由不同长度双官能二胺分子形成的菱形结构中，石墨表面的单层共价有机框架优先与下层的高定向热解石墨（HOPG）衬底晶格对齐取向。
