Packing of isophthalate tetracarboxylic acids on Au(111): rows and disordered herringbone structures

Izabela Cebula, Emily F. Smith, Maria Del Carmen Gimenez-Lopez, Sihai Yang, Martin Schröder, Neil R. Champness, Peter H. Beton

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Scanning tunnelling microscopy (STM) has been used to investigate the formation of hydrogen-bonded structures of the isophthalate tetracarboxylic acids, biphenyl-3,3',5,5'-tetracarboxylic acid (BPTC), terphenyl-3,3″,5,5″-tetracarboxylic acid (TPTC), and quarterphenyl-3,3‴,5,5‴-tetracarboxylic acid (QPTC), via deposition from solution onto Au(111). STM data reveal that ordered structures can be formed from an aqueous solution leading to the formation of rows for the shortest acid BPTC, while the longer molecules TPTC and QPTC adopt a herringbone-like structure with significant degrees of disorder. The influence of solvent and substrate on the molecular ordering is discussed, and density functional theory is used to identify molecular models for these new phases.

Original languageEnglish
Pages (from-to)18381-18385
Number of pages5
JournalJournal of Physical Chemistry C
Volume117
Issue number36
Early online date27 Aug 2013
DOIs
Publication statusPublished - 12 Sep 2013

Keywords

  • scanning tunnelling microscopy
  • isophthalate tetracarboxylic acids
  • herringbone-like structure
  • molecular models

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