title: Solubilized derivatives of perylenetetracarboxylic dianhydride (PTCDA) adsorbed on highly oriented pyrolytic graphite.
abstract: The effect on 2D molecular crystallization caused by the addition of propylthioether side groups to the 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) molecule is investigated using scanning tunneling microscopy (STM). The molecule was deposited from 1-phenyloctane onto highly oriented pyrolytic graphite (HOPG) and imaged at the liquid-solid interface. We observe a different structure to previously reported arrangements of PTCDA due to the presence of the propylthioether side groups which inhibits the formation of the herringbone phase. A model, supported by calculations based on density functional theory, is proposed in which molecules form rows stabilized by hydrogen bonding.
authors.affiliation: School of Physics and Astronomy, University of Nottingham, University Park, Nottingham, U.K..
authors.forename: James C
authors.initials: JC
authors.lastname: Russell
authors.forename: Matthew O
authors.initials: MO
authors.lastname: Blunt
authors.forename: Gudrun
authors.initials: G
authors.lastname: Goretzki
authors.forename: Anna G
authors.initials: AG
authors.lastname: Phillips
authors.forename: Neil R
authors.initials: NR
authors.lastname: Champness
authors.forename: Peter H
authors.initials: PH
authors.lastname: Beton