Journal
LANGMUIR
Volume 31, Issue 43, Pages 11755-11759Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.5b02412
Keywords
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Funding
- National Key Project on Basic Research [2011CB808701]
- National Natural Science Foundation of China [21433011, 21127901, 21233010, 21373236]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB12020100]
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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.
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