title: Packing of Isophthalate Tetracarboxylic Acids on Au(111): Rows and Disordered Herringbone Structures.
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.
authors.affiliation: School of Physics and Astronomy and School of Chemistry, University of Nottingham , University Park, Nottingham, NG7 2RD, U.K. ; School of Physics and Astronomy and School of Chemistry, University of Nottingham , University Park, Nottingham, NG7 2RD, U.K. ; Institute of Experimental Physics, University of Wroclaw , Pl. M. Borna 9, 50-204 Wroclaw, Poland.
authors.forename: Izabela
authors.initials: I
authors.lastname: Cebula
authors.forename: Emily F
authors.initials: EF
authors.lastname: Smith
authors.forename: Maria Del Carmen
authors.initials: MD
authors.lastname: Gimenez-Lopez
authors.forename: Sihai
authors.initials: S
authors.lastname: Yang
authors.forename: Martin
authors.initials: M
authors.lastname: Schröder
authors.forename: Neil R
authors.initials: NR
authors.lastname: Champness
authors.forename: Peter H
authors.initials: PH
authors.lastname: Beton