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Download filePacking of Isophthalate Tetracarboxylic Acids on Au(111): Rows and Disordered Herringbone Structures
journal contribution
posted on 2015-12-16, 23:30 authored by Izabela Cebula, Emily
F. Smith, Maria
del Carmen Gimenez-Lopez, Sihai Yang, Martin Schröder, Neil R. Champness, Peter H. BetonScanning 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.