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J Phys Chem C Nanomater Interfaces. 2014 May 22;118(20):10911-10920. doi: 10.1021/jp502148x. Epub 2014 May 01.

Quinacridone on Ag(111): Hydrogen Bonding versus Chirality.

The journal of physical chemistry. C, Nanomaterials and interfaces

Thorsten Wagner, Michael Györök, Daniel Huber, Peter Zeppenfeld, Eric Daniel Głowacki

Affiliations

  1. Institute of Experimental Physics, Johannes Kepler University Linz , Altenberger Str. 69, 4040 Linz, Austria.
  2. Linz Institute for Organic Solar Cells (LIOS), Johannes Kepler University Linz , Altenberger Str. 69, 4040 Linz, Austria.

PMID: 24883168 PMCID: PMC4032182 DOI: 10.1021/jp502148x

Abstract

Quinacridone (QA) has recently gained attention as an organic semiconductor with unexpectedly high performance in organic devices. The strong intermolecular connection via hydrogen bonds is expected to promote good structural order. When deposited on a substrate, another relevant factor comes into play, namely the 2D-chirality of the quinacridone molecules adsorbed on a surface. Scanning tunneling microscopy (STM) images of monolayer quinacridone on Ag(111) deposited at room temperature reveal the formation of quasi-one-dimensional rows of parallel quinacridone molecules. These rows are segmented into short stacks of a few molecules in which adjacent, flat-lying molecules of a single handedness are linked via hydrogen bonds. After annealing to a temperature of

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